1986 Evinrude 90 hp WOT problems

[TC777]

I am interested in buying a boat. The guy said that the gears in the motor slip when in full throttle. He said it only occurs at full throttle, when he bumps the throttle back the issue goes away. He said his mechanic could fix it for $300. He said the mechanic said that the impeller was slipping at full throttle???? I just want some good advice from you guys. Thanks.

 

[David Greer]

Re: 1986 Evinrude 90 hp WOT problems

The advice: don't buy trouble.

The analysis: It's not the impeller; it's the propeller that's slipping. Maybe.
If so, it's not an expensive fix. It could indicate, however, that he hit something. So, if he'll let you try it with a different prop, and no slip, OK. If he says that after 23 years he's never hit anything, walk away!

But it could also be gears in the lower unit. That will be a lot more expensive to fix. And even if you got a blind estimate from a repair shop, there could be more problems uncovered.

On the other hand, if the price is right, you could buy it and take it straight to the shop for a lower unit check, overhaul if necessary, and prop repair/replace. You probably should replace the water pump impeller anyway before you use it, esp. if it's a salt water motor.

I'd buy it if I really liked the boat, and would buy it at that price with no motor and had money to repower it. Then I'd try the prop and if that doesn't work, repower. Otherwise, you won't be using that boat until August.

Some repair shops won't work on old motors.

 

[TC777]

Re: 1986 Evinrude 90 hp WOT problems

Thanks for the advice. I will stay away from trouble

 

[kenmyfam]

Re: 1986 Evinrude 90 hp WOT problems

I am interested in buying a boat. The guy said that the gears in the motor slip when in full throttle. He said it only occurs at full throttle, when he bumps the throttle back the issue goes away. He said his mechanic could fix it for $300. He said the mechanic said that the impeller was slipping at full throttle???? I just want some good advice from you guys. Thanks.

Sounds scary to me. I would steer clear !!!

 

[emdsapmgr]

Re: 1986 Evinrude 90 hp WOT problems

Could be nothing more that a bad prop. If the hub of the prop is bad, it could be any easy fix. Try another prop and see if it fixes the slippage. If that does not fix it, you may need a new clutch dog and a new forward gearset in the lower unit-a more expensive proposition...

 

[kenmyfam]

Re: 1986 Evinrude 90 hp WOT problems

Make a mark on the hub and prop, take it for a spin then see if the marks still line up. If not then you have a spun prop.

 

[Gotts]

Re: 1986 Evinrude 90 hp WOT problems

Could be the lower gears, normally it feels like someone hits the back of your boat when it slips in and out. Not costly but, still what else is wrong?

I agree stay clear unless you've gone over it really good.

Good luck

 

[Benny1963]

Re: 1986 Evinrude 90 hp WOT problems

sounds like a spun hub being able to let off and gain speed.mark the hub if it moves its the hub jew him down to bottom dollar ,i bought a 50 evin that did the same thing ,put a used prop on it and ran it for a summer sold it on the water for double my money but i only paid 100 with controls ,he thought it was the lower ,if he will let ya mark it and run it and drain some fluid ya may have something ,but theres always the unknown.