1986 Yamaha 200 Slow Starter

[Jprevat]

Hey Yall,
I'm rehabbing an 86 Yamaha 200 and I am seeing hot battery wires and a slow starter that results in a no start situation. If I put a battery charger on in spins up faster and starts right up.

Battery is new and so are the battery lugs so am I looking at bad cables or starter?

Thank yall for the advice ahead of time.

 

[racerone]

I would take the starter apart for inspection.-----Very easy to do.-----Yes when folks get near a boat they have an extreme desire to get the motor started.-----After driving for say an hour or more the temptation is to crank and crank till motor starts.-----Results in many damaged starter motors.

 

[Jprevat]

Thank you Racer. This motor sat for a long time before I got it. I've had to replace fuel pumps, power pack, and rebuild the carbs. So I wouldn't be at all surprised if the starter was dragging due to corrosion.

I'll post what I find when I open it up.

 

[boscoe99]

HOT battery wires?

That should be telling you something. They should be cool as a cucumber.

Use jumper cables to power the starter motor directly. Does it now spin rapidly or still slowly?

 

[matt167]

You can load test a starter to see if it's good. Commutator starting to get worn, brushes getting carboned up and/ or worn and bam you get a slow start. What it does is draws more current than the battery normally delivers.. Booster pack gives it a jump and it gets good power again.

The other thing that does it is trying to start with a low battery, and the reason is the amperage is higher at a lower voltage to do the same amount of work. For this reason, it was very easy to burn a starter up on a 6V car

 

[Jprevat]

I went ahead and pulled the starter apart and I am pretty sure this is the 86 original. The magnets are worn and the case is corroded. I cleaned it out and will be trying it tomorrow just out of curiosity but I am ordering a new one tonight.

 

[Jprevat]

Update: the cleaned starter spins up much faster and in turn so does the engine. Cold to running in under 10 seconds of actual cranking. Before it was taking at least 30.

Thank yall for the guidance.

 

[99yam40]

magnets should not be worn since they should not be touching anything

 

[Jprevat]

The three down in the bottom of the starter that circle the shaft look as if the starter had been pulled apart before and forced back together rather than finessed.