I got a call from a friend that said his motor cold will start up and idle fine, take off, WOT perfect for 10 mins and then starts to fall off. He said after 10 mins. of running it will idle but sounds like it is missing and will not get up to speed.

Any suggestions where to start troubleshooting???

Anyone with DVA specs or manual on PDf of this motor?

Any help is appreciated..

1978 evinrude 35hp

Thanks

John