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What should the compression pressure be on a 8hp mercury outboard 2 stroke?
185psi
What is the spark plug gap for a 1988 88 HP Johnson outboard motor?
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
What should the compression be at on a 150 hp mercury outboard motor?
I should be equal on all cylenders and about 110 to 120
What should the compression be for a 50 hp 4 stroke Mercury outboard motor?
125 is the least
What is the compression for a 1974 Johnson 65 hp outboard?
In the early 1970's, when you could still get good gasoline, outboard compression in the 180-190 psi range was common. If your 65 hp Johnson is running in the 100-150 psi range, this would be acceptable, and the engine should still perform well on todays fuel. The important thing to note with compression readings however, is that the difference between the highest and lowest reading, is no more than 15 psi. One more note, avoid fuels containing alcohol if at all possible.l
What is the cylinder compression for a 1999 135hp mercury outboard?
should be at least 100 PSI and the difference between cylinders should be less than 10% of each
What is the cylinder compression for a 2003 90 hp mercury outboard?
I have a 2005 and compression should be close to 120 psi. Normally a good engine will have compression between 115 and 130 psi but a leak down test should be performed also to know the full condition of a cylinder.
Where can you get owners manual for Johnson 1997 outboard motor 200 hp?
should be able to find it at this site http://www.marineengine.com/manuals/johnson/index.html?gclid=CKXf-92Xg5QCFRZjnAodnjN_WA
What should a 1966 80 hp Johnson seahorse compression be with all plugs out and cold?
120 psi
What is the year of your Johnson outboard motor model number is 6r-71g serial number is j3382841?
Should be a 71 year model
How much does a 1979 Johnson 140hp outboard motor weigh?
About the same as a 115, same motor, different carburator. Should be around 350lbs.
What should the compression be on a 9.9 outboard?
optimally at least 100 psi on each cylinder, but the most important thing is that both cylinders are 5% within each other.
