Home › Forum › Ask A Member › Minimum compression? › Re: Minimum compression?
April 19, 2015 at 2:15 am
#14241
Higher horse power motors will require higher compression. Mercs also have higher compression than the johnson evinrudes etc. 60 psi is ok on low hp omc. 80psi or better on 10 hp omc or higher is best. Just what I have been told not really a rule of thumb.