25 Horse 2 stroke overheats

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Last fall I bought a 1980s Alumacraft Backtroller with a 1990s Yamaha 25 HP 2 stroke (Model Number 25 MLHS) that overheats at trolling speed. Does this sound like it might need a new water pump impeller?

Also, I accidentally broke the keel off the bottom of the motor. :facepalm: Is there any way to fix this without replacing the whole lower unit?

This is my first post with attached photos. I hope they come through.

Thanks for the help.

 

[99yam40]

Re: 25 Horse 2 stroke overheats

When was the last time the impeller was changed?
they are something that Yamaha recommends to replace at least every few years.
Look up skeg guard

 

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Re: 25 Horse 2 stroke overheats

I don't know when the impeller was last replaced. don't recall if the previous owner said. Water seems to flow out of the engine pretty well at medium to high speeds, but I don't see any coming out at slow speeds, and the overheat light eventually comes on.

 

[99yam40]

Re: 25 Horse 2 stroke overheats

So what does that tell you, the tell tail is there to tell you if water pump is pumping water

 

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Re: 25 Horse 2 stroke overheats

So that's why its there... Not the first time I've missed the obvious. Thanks!