compression on 1971 9.5 johnson

[joho5]

do I just pull the spark cables off, then one at a time pull the spark plug out and replace with compression meter, then proced to turn the crankshaft? or do I pull the string?

I have never done this before and want to make sure thats not an issue with my motor.

thanks

Matt

 

[CATransplant]

Re: compression on 1971 9.5 johnson

Remove both spark plugs, screw in the compression tester into one spark plug hole, then pull the rope 5 or 6 times. Repeat on the other hole. Ideally, you should ground the high-tension wires, but if you can pull the safety lanyard (if it's equipped with one), you'll be OK.

Report your findings here, please, and we'll help interpret them for you.

 

[joho5]

Re: compression on 1971 9.5 johnson

i dont have a safety lanyard and I dont know what the high tension wire is.

sorry im pretty new to working on outboards.