evinrude 9.9 compression test|Do I have a cylinder/compression issue on my 1980 Johnson : retailer I'm not one to just throw parts at something until it works right. Diagnosing the issue, doing tests then buying the correct part or doing a proper adjustment is the smart way to . Resultado da Oferece também narração de futebol ao vivo dos jogos do Vitória e do Bahia. Pode ouvir a Rádio Sociedade ao vivo no estado da Bahia na frequência 740 AM e na região .
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I have a few of questions about my 9.9 rebuild project. First, I did a compression test on the engine. Initially, I sprayed fogging oil in the spark plug holes and ran the test. . 1988 Evinrude 9.9 compression question. I've searched and haven't really found a good answer. Saw anywhere from 110 to 70. I am selling a motor and guy came to look at it. . I bought a boat last night with a 1979 9.9 Evinrude. While doing the test on the bottom cyl. my gauge would screw in all the way preventing me from doing the test. All the .
I'm not one to just throw parts at something until it works right. Diagnosing the issue, doing tests then buying the correct part or doing a proper adjustment is the smart way to .
The type and model is what matters in an outboard’s compression readings. Not necessarily the hp or size. Some of the 9.5’s had 65-75 lbs when new. The late 80’s 200 hp looper motors only had about 85-95 lbs . Compression readings should be the same or within 10% of each other. Due the age of your motor, readings in the 90 and above would be good. Use a screw-in type guage. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110 .
Test. Compression : Compression on these motors may seem lower than some of the others. Displacement of the these 9.5 hp motors is 15.2 Cubic Inches with a Wide Open Throttle of . If no problems are found during the spark test, grounds, stop switch elimination, visual wiring inspection, then I would use either a timing light or those inline neon spark .On a 2 stroke engine, a compression check is sufficient. Steps to performing a compression check: Obtain a compression gauge. As earlier stated, you can purchase a compression gauge at most any auto parts store for about 30 dollars, give or take. They’re not expensive and you don’t need the best one on the market. Remove all spark plugs. Re: aprox. how much compression should i have. 9.9 82 johnson It's really not important how fast you pull rope for a compression test. Just pull like you're trying to start the motor. Compression readings should be the same or within 10% of each other. Due the age of your motor, readings in the 90 and above would be good. Use a screw-in type guage.
Re: 1982 Evinrude 9.9 newbie Thanks very much for the quick replies - I have only just posted an hour or so ago and didn't expect such a quick response for my queries from Australia. Ok - compression test? Need some kind of gauge. I remember seeing these a long time ago. Am I right in saying you push or screw them into the spark plug port.
aprox. how much compression should i have. 9.9 82 johnson
Re: evinrude 9.9 1979 poor idle,loud exhaust,less power Since you own a 32 year old motor that is just going to get older I would buy yourself a compression guage and a spark tester (or make a spark tester). You will be needing them again. Your problem could be compression, spark or even fuel. Well I have had the opposite experience on my 1975 9.9 Evinrude. The champion plugs you named caused me different problems but the NGKs you mentioned never caused me a problem. . have you done a compression test since the "incident"? M. mark.h Cadet. Joined Oct 4, 2011 Messages 13. Oct 5, 2011 #20 Re: 1975 9.9 Evinrude Spark OK OK I guess I .
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Re: 1978 Evinrude 9.9 Model 10824M Before spending a $ on this motor you should do a compression test.--Tilt rod can be made up with any suitable material. -----The knob on the side is for idle speed only and is not a mixture adjustment, motor . I do a compression test on my Johnson 9.9 Outboard and tear it down to diagnose what is wrong with it. Look like I have to decide on what I want to do. Rebui. Re: 9.9 Evinrude Issues loose plugs will cause compression issues!!! and ruin the threads in the head. id start your diagnosis with a compression test, then move to fuel ( if you have good spark). a bit of seafoam goes a long way if it is a carbon problem.
Johnson & Evinrude Outboards . Johnson 9.9 1980 compression number . Johnson 9.9 1980 compression number You've got a 20% difference in the compression across cylinders. That's out of spec. Time to pop the head and see what's going on. S. svey . How can I test to see if it is leaking? I could try tightening the bottom bolts if I can fit a . Knowing how to perform a compression test is essential if you are buying or maintaining any outboard motor. This is the process. Hello, I just bought a 9.9 evinrude, it turns out the compression may be a problem. The top measures 70 psi and the bottom 100 psi. The motor is extremely difficult to start, once started it will not start again after it shuts off. I assume that .
What is good compression for a 9.9?
Re: help 1979 evinrude 9.9 won't run Disconnect the fuel line at the carb. and give the rope a few pulls. You should see gas coming out of the line. I would recommend you do a compression test and write down the numbers. Best of luck. Rick. Hello, My father had an old ‘74 evinrude 9.9 laying around in the garage for about 20 years and my son and I decided to get running again. We have spent the last 2 months on and off working on it and even repainted it. Looks brand new once again. We got it running really well on a stand so the.
Johnson & Evinrude Outboards . Loss of power in 1974 9.9 johnson? Thread starter Gafisherman; Start date Jun 15, 2011; 1; 2; Next. 1 of 2 Go to page. Go . im gunna take heat for this compression test without a tester,it wont give you real world numbers, but try it. remove the top plug, pull the cord out slowly pay close attention to the feel . Im new to outboards and am having a problems with my 1996 evinrude 9.9. I just picked up a new boat with it on and at WOT it bogs down and barely builds rpm. when you back off the throttle it starts to pick up a little speed but still maxes out my 15ft sea nymph at 8mph, I knew something was wrong because my friends mercury 9.9 with the 15hp conversion will .
Anyone know how much compression a 1985 Evinrude 9.9 should have. Mine reads about 80 on both cylinders and I think this is a little low. D. DJ Guest. Nov 12, 2006 #2 Re: Evinrude 9.9 Compression Those are good numbers. It is more important that both are very close to each other.
Ok, I started a thread a little bit ago about my 1965 johnson 9.5 having a "cough" at low rpm. I had taken the previous owner's word that the compression was 120 on each cylinder. I checked it and it is more like 75-80 psi. Now, I have a 1973 9.5 evinrude (basically the same motor, right??) This one runs as well and has about 80 psi. My father had an old ‘74 evinrude 9.9 laying around in the garage for about 20 years and my son and I decided to get running again. We have spent the last 2 months on and off working on it and even repainted it. Looks brand new once again. We got it running really well on a stand so the other day we took it to our stock pond to test it out.
Looking for some diagnostic expertise on some compression test numbers on a 1984 Johnson 90 HP V4. Done after running for a few minutes. Starboard side top - 65 / bottom - 85. Port side top - 70+ / bottom - 80-. Definitely outside the 10% and seem low but can't find what the normal compression numbers should be. I am working on an 1985 Evinrude 9.9 that has overheated and started to smoke. It was shut down. . Compression, although not tested, seems to be good as the engine starts and runs well. I will test to be complete. Thank you. J . H. Haffiman Commander. Joined Dec 17, 2009 Messages 2,454. Oct 4, 2011
Johnson Evinrude Outboard Forum . 1983 Evinrude 9.9 Yachtwin. Thread starter BRUPP79; Start date Sep 2, 2020; B. BRUPP79 Regular Contributor . � looks to be in good shape. 125 psi dry and 140 wet per cyl compression test. Great spark. Wires are buggered up so charge and elect start are unknown yet. Decent shape for the age. Pulled carb .
Topic: Minimum compression? – Antique Outboard
1985 9.9 evinrude 9.9 has misfire on lower cylinder has 110 compression on both. Cly getting spark on both as well as fuel.have swapped out coil,power pack stator and trigger within spec and no sigh of water intrusion.but is a excessive amount of unburnt fuel out the prop exhaust it will pop occasionally.did a drop test and stayed running on top cly but only for . Re: 74 Evinrude 9.9 no spark Thanks. I got this motor as a project motor from a person who could not get it to start. Not exactly sure what they did to try to get it to start, but it had low compression and evidence of water leaking into .
I have a 1975 Evinrude 9.9 hp that when I run it the leg fills with water so high its getting into the cylinders - seems like the water is not getting out fast enough. It has a new water pump, head gasket and thermostat gasket. The thermostat has been removed. There is no thermostat installed. [FONT=Times New Roman, serif] I have a 1985 9.9 HP Evinrude long shaft (10SELCOM) that I use on a sailboat. I have read that the 15 HP Evinrude is really the same engine but with different carbs, a different exhaust tube for at least some model years, and tuned to run at a higher RPM.
Bottom cylinder not firing properly, compression shows 90 lbs on both cylinders. Swapped plugs and. Shop . Main Menu. SHOP LOGIN; CREATE AN ACCOUNT . 1976 9.9 Evinrude Try to do an external spark test to see if the ignition (especially the bottom cylinder) can jump a minimum of a 3/8" gap or if the bottom cylinder is even sparking at all. .
I’m working on a 1977 9.9 Johnson for a friend (Model 10R77A). It has no spark on either cylinder. The Clymer manual has resistance readings for the driver and secondary coils, but further testing calls for a "CD-voltmeter" to measure driver pulses.
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evinrude 9.9 compression test|Do I have a cylinder/compression issue on my 1980 Johnson