1982 evinrude 140 rebuild with 90 heads

[gvl]

I am doing a rebuild on a 1982 evinrude 140 using 90 heads (the #1 head got dinked up and I had the 90 heads) - the job is complete will put on water when the weather is good - how much power will it cost me?
gvl

 

[Dhadley]

Re: 1982 evinrude 140 rebuild with 90 heads

I doubt you'll see any difference unless you up there pretty good in rpm.