Head gasket 85hp or 135hp ?

Devonaaron

Seaman Apprentice
Joined
Aug 1, 2010
Messages
32
I got.a 1977 85hp that runs good in gear but in neutral misses or something like that an dies almost like a lean sneeze. Took the heads off to just take a look and I have 135hp Johnson heads on their. What that means I don't know but I would think it needs the 85hp ones. Dose not make any sence at all. Had the hardest time with motor replaced all electronics. It just seems to miss bad at idle in neutral sometime will die instantly but about ever 3-6 sec it kicks or sneezes. Motor has good compression just trying to figure out what in the world is the matter here. Runs great at wot and in gear it will idle at 600 in gear but put her in n and will die rather fast unless kept above 1600 and still some missing their. Rebuilt carbs ordered new idle orfice just can't seem to figure out what the deal is with it. It has fixed idle adjustments and new fuel pump. What a pain in the *** I just wanna take my glastron I totally redid out and hit some waves.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,930
Re: Head gasket 85hp or 135hp ?

I dont think 135 heads will fit on your engine as it a 3-3/8 bore and the 135 is 3-1/2 bore...
 

Devonaaron

Seaman Apprentice
Joined
Aug 1, 2010
Messages
32
Re: Head gasket 85hp or 135hp ?

Your correct i just am not sure why it runs with the 135hp ones it dose seal but is to big but not sure if it's a problem.
 
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