I have an exhaust leak under the cowling of my 1983 Evinrude 35hp jon boat motor. It is fouling the intake air and causing rough running and low top end. I believe it is due to a faulty powerhead-to-midsection gasket. I have tightened the 6 nuts that appear to be clamping that joint together...
Re: WOT Engine RPMs and Prop Pitch for Rebuilt 25 hp Evinrude
Update: I tried the hotter plugs and it ran much better, however I am still getting plug fouling. Taking it back to the rebuilder mechanic today for a look-see. I increased the angle of the hydrofoil which helped get the transom...
Re: WOT Engine RPMs and Prop Pitch for Rebuilt 25 hp Evinrude
Update: I finished the motor and boat painting and it turned out great.
The white primer lower unit pic shows how I filled in all of the screw pockets and voids with paintable silicone (removable later if necessary) to streamline...
Re: WOT Engine RPMs and Prop Pitch for Rebuilt 25 hp Evinrude
Thanks for all the input.
1) I will raise the motor 3/4"
2) I suspect my paddlewheel speedo is a little off. I will take a GPS next time and calibrate it.
3) The 40 hp estimate was figured this way: A) In 1983, the 25 and the...
Hey this is my first post but I have been lurking for years and have found lots of useful information on this great site that has helped me work on my boat. I have over 35 years of shadetree boat and engine work under my belt. Glad to finally be participating.
I recently had my 1983 Evinrude 25...
Hey this is my first post but I have been lurking for years and have found lots of useful information on this great site that has helped me work on my boat. I have over 35 years of shadetree boat and engine work under my belt. Glad to finally be participating.
I recently had my 1983 Evinrude...
