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1981 Johnson 9.9 No Power

W

wade b

New member
I have replaced Power pack, plugs, water pump, rewired(placed all grounds directly to block),rebuilt carb and fuel pump. I am getting spark on both cylinders, but take it out and put a load it falls on its rear end. Just before I pulled it off the boat, I noticed what looked like milky fuel on the leading edge of the carburetor. My next step is a compression check. Any advice or recommendations would be greatly appreciated.
 
Not sure why folks just start replacing parts.---This could be as simple as a broken reed valve.------Trouble shooting starts with a compression test.----If that is good there are more simple tests.
 
Fuel ( or any liquid ) needs heat to vapourize.---In this case it gets some of the heat from the carburetor body.-----So now you have a cold carburetor.----Then water vapour comes in contact with the cold surface as air is pulled through the carburetor.-----It condenses and shows up as that while / milky stuff.
 
Not just replacing parts to fix. I wanted to revive the old lady for my wife and daughter's boat. Nothing but the best..... Thank you for the post. I did not even take into account about the reeds. The only reason a compression check has not been done is, I keep forgetting mine at my shop..... Thank you...
 
Thank you for the links. I will re post with comp. later today. As for spark gap test, I am currently looking for a replacement test strip. Mine that I have had for over 20yrs, decided it no longer wanted to be in my tool box. It just got up and wondered off. The new ones I have found are not the same quality product.
 
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