89 Johnson 140 overheat issue.

[misery]

I recently picked up an 89 Johnson 140 hp. The motor hasn't been run for five years, but after some tinkering I got it running but it tripped the overheat alarm after about two minutes of running in a barrel. I noticed that it wasn't putting any water out of the tell tale, so I put a flusherette on it and it started to put water out of the tell tale, but it still overheated.
Is this a sign that my impeller is toast or is there another reason for this condition?

 

[Bob_VT]

Re: 89 Johnson 140 overheat issue.

Drop the lower unit!!!! It is new to you and it needs to be checked. The entire process is under an hour to drop, inspect, (replace impeller if needed - I would)and re-install. The 89 is a great model year. If you don't do the right thing then your wallet could be toast.

 

[V153]

Re: 89 Johnson 140 overheat issue.

Yes. Replace the impeller. There's a possibility the tstats could be effed up too, of course, considering how long it sat. But I would highly recommend putting at least a new impeller in it for starters

 

[misery]

Re: 89 Johnson 140 overheat issue.

Ok so I replaced the impeller on the motor and now i have a couple of new issues that i've noticed. The first issue that i've noticed is that it takes quite a few seconds for water to begin coming out the tell tale. Is this because of the amount hoses and such that the water has to pass through? The feed for the tell tale is on the top of the port head, so i assume that the block and heads have to fill before it can exit out the tell tale. The other issue I noticed is the strength of the of the tell tale stream. Its not that strong, on a garden hose. The tell tale hose seems rather large on this motor, about 5/16" id. Should this be stronger in the water?
Thanks for all the help.

 

[schematic]

Re: 89 Johnson 140 overheat issue.

the telltale has a vent incorporated in it. The stream is not very strong