2001 Yamaha F80 Compression

handi2

Cadet
Joined
Nov 19, 2011
Messages
24
Hello,

I want to do a quick compression test on a 2001 F80 outboard. I know a leak down test is required for an acurate test. I am changing the spark plugs and engine anodes so I would like to do a quick compression test.

What needs to be done to do this? I have never done a compression test on a 4 stroke outboard engine. It is a carburated engine with no EMM.

Do I need to ground the plug wire?
 

luskateer

Seaman Apprentice
Joined
May 1, 2008
Messages
36
Re: 2001 Yamaha F80 Compression

also you need to do the test with "Wide Open Throttle". Otherwise the reading is about half what it should be.
Ground the plug wires.
All plugs removed
 
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