18hp Evinrude Fastwin won't go to full throttle

[vaporeyezer]

I took boat out on lake and motor starts good and runs good, but could only get the tiller throttle handle to turn to about 1/3 throttle, so boat does around 6mph instead of 19mph. I took shroud off and all linkage from throttle seem free from obstruction. What would cause this, is it lower end related?

1973 evinrude fastwin 18hp

 

[lil-dingy]

Re: 18hp Evinrude Fastwin won't go to full throttle

i am new to the outboards but i ran into simmiler trouble on my 59 johnson had a sparkplug wire hooked on a mount... was a frusterating easy fix

 

[tashasdaddy]

Re: 18hp Evinrude Fastwin won't go to full throttle

sounds like the neutral safety is not moving out of the way, blocking the timing plate. it is a flat bar, just above the shift handle, that runs up to the timing plate.

 

[vaporeyezer]

Re: 18hp Evinrude Fastwin won't go to full throttle

Thx, but spark plug wires are fine and neutral safety is moving out of the way as well. everything that is visible appears to be moving freely which makes me wonder what it could be?

 

[EJ_Evinrude]

Re: 18hp Evinrude Fastwin won't go to full throttle

So, did you find the problem? I am seeing the same issue on 1968 18 Fastwin. Fresh rebuilt carb and idles great. If I manually push it around the flywheel it will go into full throttle.

 

[jbjennings]

Re: 18hp Evinrude Fastwin won't go to full throttle

My guess is that the throttle gears have jumped mesh either at the tiller handle connection or the armature tower where it nineties.
Good luck,
JBJ

 

[outlaw241]

Re: 18hp Evinrude Fastwin won't go to full throttle

i had same problem,the vertical linkage that slips in at the back of tiller has two flat blades on it one of my blades had broke off hope this helps.