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1993 Force 90hp starter.kicking out

Nmshields

New member
Hello, having some issues with our 93 force outboard. We just purchased it a few weeks ago, apparently hadn't been ran in a few years. When first launched it had an over heating problem, replaced waterpump that was totally destroyed. Before we replaced the water pump it started up fine but would overheat obviously.
Since replacing the water pump we can no longer get the starter to stay engaged (it kicks out within a few seconds) and haven't been able to start it since. We've gotten it running once but it idled too low and then killed within about 10 seconds.
What we noticed today is that the starter will only stay engaged(stay against flywheel) when the killswitch lanyard key is pulled out. Once putting the killswitch key back in place the starter continues to kick out, is it something as simple as replacing the killswitch? We are out of ideas and new boat owners.
What we have replaced already: starter, starter solenoid, waterpump, battery

Thanks for any help!
 
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Do a compression and spark test.
Since it runs it should be ok, just do it as this is the first steps in any troubleshooting procedure.

New starter, right from the box they can be bad.
Get a rebuild kit, get the Mercury one if possible.
Any kit will work but the cheapo aftermarket can cause more trouble.
The brushes can crumble when they get hot:(

Still have the problem then the solenoid might be kicking out.817109A3
Again use Mercury parts if possible.
A 4 post Ford can work in a pinch.

Even a new battery can be weak, load test after charging.
 
Two with the same low comp.
Might be the head gasket?

Uneven comp. can cause the problem with slow turning and the starter releasing early.
 
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