97 evinrude 20hp troubles

[andrewfarmer]

i have a 1997 evinrude 20 on a 1985 basstracker. 15ft alluminum. motor runs and planes very well with one person on the boat. but when two people get on the boat it runs like crap and doesnt plane. Any suggestions?

 

[JB]

Re: 97 evinrude 20hp troubles

Howdy, Andrew.

Welcome to iboats.

You are possibly overpropped, but there are some other things to look at first.

Anti-ventilation plate. Is it at about the same level as the bottom of the boat? If not, make it so.

Engine tilt. Is the AV plate pretty much parallel with the boat bottom?

Is the throttle plate opening completely (horizontal) when WOT is applied?

Are the throttle and ignition timing synchronized exactly as called for in the Service Manual?

Is the boat bottom clean and smooth?

If all of the above are correct, you will need to borrow a tachometer to measure engine speed when at WOT (Wide Open Throttle) both with a single passenger (you) and with a second passenger.

Let us know what you get, and good luck.

 

[andrewfarmer]

Re: 97 evinrude 20hp troubles

Thank you for the input. The throttle is opening completely at wot. I have played around with the tilt of the engine but havent tried every spot, ive been fishing tournaments every time i am on it.lol I will try to adjust the tilt every which way possible and hope for the best. The prop is a 10x13. i believe this is the standard prop according to marrine engine.