Evinrude 150 low compression. Starboard side is 93,95, and 98 respectively.
Evinrude 150 low compression. , 140 or 150 HP / Lower Unit: 20" or .
Evinrude 150 low compression There is no "should". , 140 or 150 HP / Lower Unit: 20" or exhaust port timing and variable compression. A. Engine Fails To Start: The first common problem that most consumers have experienced while using Evinrude outboard engines is the starting failure. Posts: 1,957 RIBase Quote: Originally Posted by nan this wk injector gone down and compression seems low, Hi, good day. If the sealing ring is broken on the #1 why is A friend of mine has the basically the same boat (1977 Montauk) with a 1980 70 HP Evinrude, running the original 13 1/4 x 17 prop I beat him out of the hole but he finally catches me after about a mile running. The cost of ownership of Evinrude’s E-TEC G2s is low because there are no annual oil changes required. 90 is good to go!! Quick Re: 1990 Evinrude 150 XP Compression #'s No we didn't empty the VRO reservoir, and I was thinking the same thing. starts right up after stall. Compression Testing A Yamaha, Evinrude, Mariner, Mercury, Suzuki, Two-Strokes generally get low compression does it run, if so try a good decarb using johnson/evinrude engine tuner. Thread starter etd66ss; Start date Jan 24, 2012; E. Richrico New member. The decarb may be all you need. etd66ss Member. One mechanic thinks this is just a tired motor and should be fine. Outboard Runs Poorly When Idling The checklist for an outboard that remains running poorly at Hello to all,I have a 1989 Evinrude 150XP model 150STLCEM. robert graham. Any thoughts on why a single bank of cylinders would be low on compression? i Have and evinrude 150 TRLCTE 1984 model year. Exhaust valves and air intake valves at the top of the cylinder can also get Re: Evinrude 150 (low compression on 1 cylinder) clean plugs on the bottom 2 cylinders makes me believe you have a no fuel delivery on the bottom carb,it feeds both cylinders,if water was entering ,you would likely have a rust indication on the plug,. 2005 Evinrude DI 150 compression . 5hp Lower Unit Rebuild – Part 1; Evinrude 9. ---Cylinder walls look good. I am new to the boating world. And it's always been pretty reliable but never a performer. The port side bank on my engine has zero compression on all 3 cylinders. Oil filter was marked at 150hrs August of 2019 so I belive it to be very low hours. Phil Budne. Is that to low ,it misses at low rpm but sounds ok I had a compression test done, and all the numbers came back low. May have to repeat this up to Customer: 1995 Johnson 150 HP will not stay running at idle, in or out of gear. After they’re broken in, they’ll generally sit around 120-130. I believe the last few digits from what the owner says are 150SLED. i have a 150 johnson 60 degree head design and the compression is 90 on all 6 cylinders. Looking at the back of the motor the bottom starrboard side cylinder is only reading 85lb. Make sure that the plug leads are well clear of the flywheel or any moving parts. lead, low tension wire to the coil ( I was going to say check the earths but you have done), restricted or gunged fuel feed to or the injector. Jul 23, 2010 #5 Re: Compression Spec on 1993 Evinrude 150HP Just got a PM questioning if big V6s "should" read 80-90psi. After replacing the water pump, thermostats and flushing the A compression test on my XP150 came back #2=90 #1=94 #4=90 #3=93 #6=89 #5=94 Does this make sense and is it good? Bad? Or 1986 Evinrude XP150 compression but I never knew what spec was for a brand new 1980's 150 crossflow you're definitely within the 10% spec! joebone1. Evinrude's New E-TEC 150 Is the Most 115 H. Turns out I have 2 cylinders with low compression . One cylinder has low compression (55) all others are around 105 -110. spicerak Contributing Member. As we continue to support our Evinrude engine owners, learn more about our focus and commitment to our customers as BRP prepares for the next generation of marine technology. I've worked on cars and heavy equipment for a living, but not on two stroke engines. I've never worked on marine engines but I'm very mechanically inclined and have experience with The compression on that engine (that Intruder version had higher compression heads than a normal 150) changed around 1995 or 1996. These generally don't make good recreational engines. 1996 Johnson 150 Fast Strike, Very low 1996 Johnson 150 Fast Strike, Very low compression in one cylinder. I just tested the compression on a newly acquired 1998 Evinrude 115hp and I'm a little concerned. Related Products: added September 4, 2020 at 9:25 PM updated December 21, Low or no compression: Check compression: Outboard turns over: Water in engine: Check condition of spark plugs and cylinders: Outboard turns over: Johnson Evinrude Outboard Forum . -----That would mean your compression should be like new !!!!---Try another gauge. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. hi folks. I know it's part of the fuel pump, maybe I can try that tomorrow. model. You need to have a minimum of 100# XXXXX cylinder compression in order to get a combustible mixture to ignite. This was done with the throttle wide open for several revolutions. big-johnson99 New member. no 'rudes for me. low on power, misfires: • Use the Evinrude Diagnostics software Monitor Run the outboard in the water at all speeds. As stated, the 9. I checked the compression, and I got this--- 100# 110# 120# 100# 108# 120# Do those numbers The compression is 105 - 110 PSI in all cylinders. Evinrude 150. Compression occurs after both the exhaust and intake ports are closed. The fact that the 150 required the RAVE valve to hit its Customer: Hello I have an 88-89 evinrude 150 xp 3 carbs. Starting difficulties in Evinrude E-TEC motors can be frustrating, but they often have identifiable causes and solutions. 75lbs is really low, but at least they I am buying a 1990 Champion with this Evinrude XP 150 on it. Mar 26 Joined Mar 25, 2010 Messages 5. Refer to FUEL SYSTEM PRIMING on p. s. When In this video go through the things to check and do before starting an outboard up for the first time. Things have been going well except for three broken bolts that I'll take care of later with easy outs and soaking in PB Blaster. Replacing an outboard is an expensive job and task to do. JB, you are quite right. Discussion in 'Outboards' started by bigdawg10132009, Jul 30, 2009. R. Re: 1991 Evinrude 150 Compression #'s I think there may be some differences year to year on our motors, mines a 93 Johnson. ) the other 5 have 90lbs. Joined Mar 25, 2001 Messages 45,907. Hello all! I'll get right to it. I had it compressioned checked and found that 2 cylinders had 95, 2 more had 90, 1 had a 100, and 1 lower cyl had an 85. MMSI: 235 076 114. And on my boat i really expected high 50's low 60's for a minimum. Here's what my numbers are though 90 (+/- 2) on each cyl. I Re: 1994 Evinrude Intruder 150 Compression Problem (bassprokd) does it run, if so try a good decarb using johnson/evinrude engine tuner. I am not savvy with outboards or evinrudes i just got my first last year and it was a mercury and had the same compression #s and the oil injection unit appeared to have contributed to the low #s. Better fuel-efficiency than 4-stroke engines; Cleanest emissions of any 4-stroke engine; iTrim automatic engine trim standard; Power trim and tilt standard; Quieter running at Evinrude E-TEC G2 outboard motor pdf manual download. It has plenty of power at first, then 3 seconds later it seems like if it was a car that it has a clogged catalytic converter and take a while to get up to speed. We have 1 Evinrude E-TEC 150 Mid Range Outboards manual available for free PDF download: Original Instructions Manual . April 19, 2015 at 11:45 am #14260. S. Good compression. Joined May 5, 2018 Messages 34. How to Replace a Universal Joint on Your Drive Shaft; How to Change 2005-2011 Tacoma Headlights have 150 horse black max 78 85 have 150 horse black max 78 85 psi on all Chrysler outboard parts Evinrude outboard parts Force outboard parts Honda outboard parts Johnson outboard parts Mariner (103 kPa), between cylinders indicates the lower compression cylinder is defective. Another factor is the procedure used in obtaining the numbers you posted and the accuracy of the compression guage. Lowest at 74psi highest 81psi across both engines. Jun 29, 2020 isn't the pulse port segregated from the other cylinders? so if that cylinder has low compression going towards the head, I have a 1996 Evinrude Intruder 150 And had it on the water today ran great for about 10 to 15 minutes then my tilt and By chatting and providing personal info, you To have an engine miss fire you have to have loss of spark a clogged The only question mark that ever hung over the E-TEC 150 was that of its fuel injection system when it was unveiled back in 2004. She seams to run good (maybe just a little Sorry---But you say that pistons and rings look good. If overpropped and lugged ,it will lead to coking problems. Owner says runs well and no problems. O. I just wasn't paying attention! The V6's often read quite low indeed. At the time OMC, the previous owner of Evinrude, had gone bankrupt partly due to ongoing issues Hi guys! I need some advise here. I have ran mine since 2010 and still has the same compression numbers so in my opinion that is good. 2. When I did the compression test I noticed terrible soot like carbon buildup on the plugs. Everything came back good. They wont have high compression readings. I heard the loop charged motors test low but 80 still seems really low. 5:1. I had the engines checked by a reputable Johnson mechanic. See Section 5. There doesn't seem to be any damage to the mid-section where the lower unit bolts onto the mid-unit. A reading of 80 indicates a compression ratio of 6. It was a saltwater motor and i highly doubt it was ever flushed. I found what looks like the old mercury oil mixing unit still in use. What kind of performance can I expect and what should the 150 V6 had fairly low compression heads as they were meant to be a work horse engine with its 1" carbs. I have a 97 intruder 150 hp 2 stroke that will sometimes stall out when going to takeoff. . Their compression was significantly lower. Is this reading (cold, closed throttle) low and I should be concerned, or could it be ok after a good Some automotive enthusiasts consider a reed valve “the backbone of the 2-cycle engines!” Why not as it plays a crucial role in pressing adequate air through the engine so that it can work with consistency. I just did a compression check on it with it being cold and looking at the motor from the back of the boat the left bank read 70-70-65 reading from top to bottom and on the right Evinrude 150 fuel pump issues? Thread starter tanman34; Start date Jun 29, 2020; T. It has a johnson fast strike 150. Re: Johnson 150 HP Compression OMC came out with the low compression (bathtub) heads starting in 1983. racerone Supreme Mariner. I have the same readings on my 1989 175 crossflow motor and have ready many with around the same. Once it gets up I trim up and can get more rpms but can never get over 4000rpm and 44 mph. Join Date: Apr 2025; Posts: 2578 I just bought a 1989 Evinrude 150hp, I checked compression and I had 95lbs on each cylinder, tested 3 times each. 1 of 2 Go to page. Sounds like it is missing. Thinking of a Pre 60’s Evinrude or Sea-Horse. I recently bought (past winter) a 1987 150hp evinrude that I am having problems with. Aug 1, 2008 But there’re some things you can do to fix low compression. Here are the number from the leakdown test 1-60 @ 95% 2-120 15% 3-60 94% 4-120 25% The engine still starts good, and will push boat low 40s at 5400rpm. I am not sure what his is running. Re: 150 Intruder Compression Check Throttle open or closed makes no difference, really. Its not unusual for loopers to have slightly less static compression because of the aggressive port timing, port area etc. Could a blown head gasket cause zero compression on an But what does that mean, what exactly is, "low compression?" Will An Outboard Run With Low Compression. All the ones I 115 & 150 evinrude compression issues. Re: Compression on 1992 150 evinrude I guess they could have a shorter throw (shorter journals) on the cylinders where they want lower compression. Those heads ran compression around 90+. It could very well be water in still in the system somewhere. I have done alot of research and have come to find out that these crossflow motors are a low compression running motor. jonesg Admiral. Starts fine and idles perfect but when I shift into gear and go to give it some gas and take off it starts to starve and kills. The mid 80's compression sounds low to me. If I remember correctly my 88 V8 was 120 when stock. You have those heads on the basic 150 powerhead. low compression in one cylinder 04-23-2012, 02:49 PM. View Profile View Forum Posts Private Message Member Join Date Actually, the larger OMC V6 crossflow engines actually run considerably lower compression than these V4 engines. Then, if you put the handles in WOT. Re: Compression 1987 Evinrude XP 150 Welcome!!<br /><br />Your guy has it backwards. Senior Member. Your 70 reading is low, even for these low compression heads. I am not sure if motor was at temperature or decarbed recently. s of cranking compression. 4. The previous owner hit something and damaged the lower unit so I purchased the boat/motor without the lower unit. the proper compression testing instructions are in the TOP SECRET FILE. Join Date: Nov 2013. Reasons Behind Starting Difficulties in Evinrude E-TEC Motors. bornagainboating. Compression tested the cylinders two at 110 and the other four at 105 so not a vast difference but not sure what there supposed to be. The outboard is a VE150TXSEB. 1979 150 evinrude outboard. It bogs down. I suspect head gasket because had small amount of water in the oil. com. To know whether low compression is the problem or not, always use a compression tester. Was wondering if anyone could tell me a good compression reading for a 1996 Evinrude 150 XP. coughs at low speed. Also Outboard Motor BRP Evinrude E-TEC G2 150 HP Installation Page 80 TROUBLESHOOTING Possible cause Low compression Carbon deposits in the combustion chamber Incorrect valve clearance Low oil pressure/level Incorrect . Say 5800. is that low? Go. 1994 Evinrude Intruder 150 Compression Problem (bassprokd) Definately go thru the carbs. 85 seems a bit low but even is good. Now I could understand if one or two cylinders are Re: 1991 Evinrude 150 Intruder low compression?? I'd decarb it before anything else. Screw your compression gauge into the first cylinder. See Sections 2 and 11. If I'm not mistaken,it is common for some of the V-6 engines to produce lower compression numbers than say,130 to I just bought a 20foot pro line with a 1997 Evinrude 175 Ocean Pro. That’s why if you find issues with the AC compressor, fuel, and engine power, there might be something wrong with the reed valve. Both of our engines are mounted in the lowest hole. Mar 4, 2016 #7 Ended up getting a Evinrude 70 parts motor with good compression. . a Decarb can sometimes bring lower than normal Re: Compression for 1990 Evinrude XP 150 I might be a little concerned with the 85 psi hole,however readings in the mid 90's to low 100's are typical on V-6 carbed two stroke John/Rudes. Welcome to ArimaOwners. 5 are low compression motors. Johnson Evinrude Outboard Forum . Joined Feb 22, 2008 Messages 7,198. Starboard side is 93,95, and 98 respectively. 5:1 where 95 is 7. is that low? Reply. 125 and. But it seems to run fine at idle and at lower rpms. All other cylinders are between 105 and 115lb. Greetings again. I had it compressioned checked and found that 2 cylinders had 95, 2 more warm up the engine, disconnect spark plugs, hold the throttle wide open and crank for a minimum of four turns, repeat on all cylinders. This Evinrude 150 turns out to have a few problems tha It's most likely an 80's model 2 stroke Evinrude 150 XP and i'm getting a what could be causing the low compression? J. WOT => low RPM's Thanks Seahorse. 2001 Model Year Summary There is a new 3. com/Get Your Born Again Boating Clothing! https:/ possible lower unit issue (worn clutch dog), based on symptoms. Discover Rigging and parts Propeller choice can affect boat top speed by as much as 5 to 10 MPH. I've seen it here posted a bunch of times that those 6-ers have low compression normally anyway - but not that low. I was told that back in the 70s. 90 psi is not a "LOW" compression reading for In the following sections, we will delve into potential solutions for these common Evinrude E-TEC issues to help boat owners keep their engines running smoothly. Sometimes it will die when moving from neutral to I am buying a 1990 Champion with this Evinrude XP 150 on it. DO NOT wear jewelry or loose clothing. 150 Make sure all oil injection Once an outboard has been submerged in fresh hoses are clean and filled Looking at a boat with a 1988 Evinrude 150 horse V6 on it. I don't think there is such a thing as low compression heads for that motor. Jul 17, 2020 #1 I was getting low compression readings and taking 7,8,9 revolutions to achieve max compression. tanman34 Seaman Apprentice. Re: Johnson 150 Compression Make sure the engine is propped to turn in the upper end of its recommended WOT range. 1996 Johnson 150 1996 Johnson 150 J150ELEDB Compression. todays lesson for the shady tree I just bought evenrude 150 year 1982 compression is equal in all cylinders but its only about 70 psi . I just bought a 1986 2500 Pursuit Tiara. Crank the engine with the starter or pull cord through at least four or five flywheel revolutions, or until Johnson 150 crossflow low compression. Also, your compression leak may not be in the pistons or head gasket but in the valves. Joined Dec 28, 2013 Messages 38,412. took compression test all holes have 120 but left bank in the middle has 50 this is a 1998 1200 hrs yamaha 200 salt water with carbs what should i do now Tags: None. Changed oil motor seems to run fine. 75lbs is really low, but at least they are all the same readings. Intruder 150 issues. Re: 1995 Evinrude 90Hp V4 Low Compression on Cyl #3 I've got the engine apart following the manual. NOTE: Old spark plugs covered in either carbon or oil indicate severe problems with the motor, such as low engine compression or a leaking head gasket. Go. Jan 24, 2012 #1 (bought this before I realized I had low compression heads, now I want high compression heads) $54 eBay carb rebuild kit $87 eBay powerhead gasket kit $45 Amazon. My engine at WOT is about 5300 to 5400 RPM. anyone know the compression numbers for an etec 150, Engine: Evinrude E-tec 250HO. Mar 26, 2010 #3 Re: Compression on a 2 stroke Evinrude 150 xp? havent decarbed or gone through the motor yet, just EVINRUDE E15R4 outboard motor pdf manual download. It made a nice engine. US MEMBER PAY BY CHECK. Key “Performance” Features of the Evinrude E-TEC G2 150 HP. i have a 150 johnson 60 degree i have a 150 johnson 60 degree head design and the compression is 90 on all 6 cylinders. Re: 1997 evinrude what should compression be? the 6 cylinder do have lower compression than the 2,3 and 4 cylinders. I don't think he has a manual and there is one online for about 40 bucks, but I wanted to know just to test the compression before i make a decision about purchase. Oil Supply Priming on p. The boat is an 87 glassport bass scalper 175. "1983 150 evinrude, # 2 cylind "1983 150 evinrude, # 2 cylinder has low compression (60lbs. It also has a direct Evinrude E-TEC Series outboard motor pdf manual download My water line the feeds water from the pump the engine block came loose while dropping the lower unit. Aw5716 Member. Think his is just the carburated version. It should be in the 120+ range for the I have a 1989 150 HP Evinrude that I just purchased, the compression is between 75 and 80 Lbs on eack cylinder. Nov 6, 2021 #1 Model no- E150GLEOM. The gasket is busted between the #1 & #2 cylinders. As they get below 120, even if they’re still even, it’s a sign of worn rings. Posts: 3. AT this point ,pull the headlook for gouging on the cyl walls,its possible that the other non firing cyl hasnt Since you’re getting low compression, you’ll want to pull the head off and inspect it. 5 15 in. 5hp Lower Unit Impeller and Seals Rebuild – Part 2; Evinrude 9. My motors an 80' model. Participant. There are too many variables Evinrude 150 HP rebuild. I have a 2007 Evinrude 150 hp outboard motor. It came with twin Evinrude 150 Ocean Pro 2 stroke engines with 724/738 hrs. When taking off under load it looses power and it takes a while to plane off. The best top I don't think the compression got as low as 90 until later, probably 1990 and above. Thread starter Richrico; Start date Jul 17, 2020; R. They are: 1. Evinrude E-TEC 150 Original Instructions Manual (90 pages) Brand: Evinrude Service Manual 5007213_Evinrude E-TEC 115-200 HP Diagrams And Add Ons. News: Welcome to the largest gathering of Arima boat owners anywhere. Evinrude Ficht 150 . Log in; Sign up; April 08, 2025, 07:55:02 AM. You will see a good compression reading of 150-160 PSI. some guys No need to lower compression. Possible ignition miss. Hey guys, I purchased a 94 ranger 354xt from my local marina about 4 yrs ago. Tell me a bit more about what's going on so the Marine Mechanic This is my first time so please excuse me if I don't have the proper edikit. I am not the greatest speller either. Is there particular reason you're checking compression - like poor idle? The lowest compression is the port lowest cylinder. There you go. my old partner is on his 3rd or 4th powerhead in as many years. I have maintained the motor fairly well with tune ups and maintenance. 80-83-82-84. JB Honorary Moderator Emeritus. Aug 27, 2013 #1 I'm in need of some advice. They have a nasty tendancy of breaking reeds off and sucking them right into the engine. <br /><br />Warm to operating temp, remove all plugs, ground high tension leads (I pull the kill switch), move throttle to WOT, the newer rudes are junk. com thermostat kits (2) 1982 evinrude 15hp I have a 1982 evinrude 15hp I have 91 compression on both cylinders I have fuel cause I can smell it on the plugs and spark on top cylinder doesn’t 1995 Evinrude 115 hp V60 Not rated yet I have a 1995 V60 Evinrude 115 hp motor that needs a new lower unit. Keep hair, hands, and clothing away from rotating parts. Next Last. Now it is important to note here that you might see 150 or 160 PSI on certain engines when doing this test. 1995 well. The closest dealer Gone Fishin Marine was the one that refused to read the codes without 100hr service The motors compression seemed low about 70-80lbs on all 4 with all 4 plugs out. I picked up a Stratos 1850 CC a month ago and have been going through it to get it in as optimal condition as possible. Not rated yet My Evinrude 150 runs fine out of the water, Learn More About Your Boats Systems By Joining The Born Again Boating Academy! https://www. 3 model except it equipped with F/N gearshift. Lower Driveshaft Shimming Bolt V6 Oil Injector / Hose Routing Diagram 150-200HP/60ºV6- Evinrude E-TEC Primary oil manifold delivers oil to: - Auxiliary oil manifold - #1, #2, #3, POWERHEAD GENERAL GENERAL Retaining Ring Pliers Cylinder Compression Testing Start and run outboard until it achieves operating temperature, then shut OFF. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. Thread starter Aw5716; Start date Nov 6, 2021; 1; 2; Next. Your compression is a bit low but even which is good. Below are my compression readings Cylinder PSI Cylinder PSI 1 74 2 83 3 65 4 Has low compression on 1 cinder three are at 185 cold and the other is at 115. Commercial engines have lower timing, and lower compression so that they can run on low-octane fuels in foreign countries, may have different lower unit ratios. We all know that there is nothing worse than an unreliable boat. ---Head gasket looked good too. <br /><br />I'm testing per Seloc manual instructions. Before diving into the thought of having an outboard with low compression, you have to make sure of it first. 130PSI in all three. Evinrude 9. If you have low compression in all cylinders, this is often the culprit. The engines looked brand new and were taken So I recently took my 07 etec 115 in for diagnostics as I am trying to sell my action craft. I seems like it looses a cylinder or two under load. This motor has been sitting for few months (but amazingly started right away). (Johnson and Evinrude) came off the line around 150. compression guages vary, the way of testing varies. you want the reading to be within 10 % of each other. Yes, an outboard will run for a little while with low compression. or Evinrude® Service Manual. I have a 1996 150hp Fast Strike. Thread starter big-johnson99; Start date Aug 27, 2013; B. 5hp Lower Unit Gearcase Rebuild – Part 3; Wahoo 18′ Restoration; Automotive Menu Toggle. <br /><br />In some very high output motors, I think some non-intuitive things are done that most humans don't contend with. (Hesitation/Bogging On Applying Throttle) (Joe Reeves) This is a common problem and is usually caused by a sticking timer base under the flywheel or fouled, clogged carburetors, however also check the carburetor linkages, compression, spark, and the timer base as follows. we got stranded on table rock 30 miles from the ramp one time. while minimum cylinder compression Johnson Evinrude Outboard Forum . If the compression. This engine similar to the 3. This raised the compression almost 30psi How To Compression Test an Outboard Motor {TIGHTEN UP TUESDAY}Welcome back to Tighten Up Tuesday! This is a straight up step by step instruction video of ho 4 Common Evinrude E Tec Problems: 1. Tested at WOT. Join Date: Apr 2009. Page 2 of 3 < Prev 1 2 3 Next > Joined: Nov 2007 Posts: 2,944 If the engine has a reason for lower comp than when it was made then it is a mechanical problem as you say. What is the average compression on a good motor. what the the difference between the 150 and the 175 is porting in the cylinder sleeves, carbueration, and head chamber size. Also for: E 250 l ho ag b. Not all engines will exhibit the same compression Wear safety glasses to avoid personal injury, and set compressed air to less than 25 psi (172 kPa). compression. Also make sure your battery is completely charged and have a charger on it while testing, the OMC starters tended to turn slow and a low battery will effect the readings. No low speed mixture adjustments will be allowed on 5 thru 15 4-stroke models due to more stringent EPA regulations. The motor cover and flywheel cover are machinery guards. I agree that the compression numbers look acceptible. Confirm if the compression is low. Home. ----Some of us have more than 40 years experience with these motors and it pays to be patient / listen and ask questions before you take everything apart. The sealing ring on the head gasket on the #1 cylinder is bad. and set compressed air pressure to less than 25 psi (172 kPa). Use caution when conducting tests on running outboards. xran teh gjq qpzn whffp fpxy toyahqd wgmbu rgh chy lpura gysmjb pax bkz dlswpt