1992 Evinrude 175 hp Intruder compression at zero

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ollierolulu

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Jul 2, 2011
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Hi,

My 1992 Evinrude 175 hp, run only on 5 cylinders everything was check, ignition,fuel and when i took the compression cylinder #3 get 0 in compression all the other one are correct. I removed the head and everything seems okay except that i have a doubt on the o-ring head gasket. Do you think is possible to get 0 in compression on only one cylinder with a bad o ring ?

Thanks a lot for your help
 
D

Daviet

Fleet Admiral
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Sep 24, 2008
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8,958
Re: 1992 Evinrude 175 hp Intruder compression at zero

It looks like it takes six o-rings, so I guess that one cylinder could blow the o-ring and loose compression on that cylinder.
 
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daveb112

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Jul 2, 2011
Messages
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Re: 1992 Evinrude 175 hp Intruder compression at zero

u could blow some air in plug hole and see if u can here where it is going it may be a valve not seating
 
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boobie

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Nov 5, 2009
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20,826
Re: 1992 Evinrude 175 hp Intruder compression at zero

Is the piston moving on that cyl ??
 
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ollierolulu

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Re: 1992 Evinrude 175 hp Intruder compression at zero

boobie said:
Is the piston moving on that cyl ??
Click to expand...

Hi, yes i remove the head and crank the engine and everything seems okay, i looked after the first ring and it's not stuck in the groove of the piston, cylinder is very clean no marks on it, but the thing strange it's compression at 0 ! i have a doubt that only a bad o ring can make this compression at 0. i will replace all o rings and see.
 
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boobie

Supreme Mariner
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Nov 5, 2009
Messages
20,826
Re: 1992 Evinrude 175 hp Intruder compression at zero

After you replace the orings just for the heck of it try another compression gauge. It's vary rare that these orings give compression probs.
 
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