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Compression 1987 225 evinrude

B

bob doolin

Guest
What should it be i have 90 p

What should it be i have 90 psi on all 6 cyl.
 
"Bob.... That reading is corre

"Bob.... That reading is correct. The compression was lowered a few years prior to compensate for the poor quality of the gasoline we have available.

Joe
"
 
" This question is for Joe...J

" This question is for Joe...Joe, about what year did they lower compression on OMC motors to compensate for poor fuel ???
Gary G "
 
"Gary.... I really don't r

"Gary.... I really don't remember exactly when that took place, but it seems to me that it took place somewhere after the middle 1980's, 1987/88/89 somewhere in there. Hopefully someone will come up with an exact year.

Joe
"
 
Joe..Do you recommend using a

Joe..Do you recommend using a higher grade of fuel in earlier engines such as premium or a plus grade with a rating of 89 or higher ???
Gary
 
"I haven't kept up with th

"I haven't kept up with that, but to my knowledge the 87 octane has always proved satisfactory. If you are having a problem which you think may be due to the 87 octane, you could try the higher octane just to see if it makes a difference. If it doesn't, it would simply be a waste of money. This of course is just my opinion.

Joe
"
 
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