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Hello, my name is***** will assist you today.
There are a few things that this problem could be. You will need to have a good quality multimeter and a helper to troubleshoot this. Do you have these?
a multimeter is used to measure voltage. We are going to need to be able to, to locate the source of the issue.
It is something either in the charging or the starting systems. If you are going to the auto parts store, take the boat battery and have it load tested. That wil eliminate a step.
A digital meter is best.
All you have to do is reply the same way that you have been. I will be here until around midnight CST today and after 10 AM tomorrow.
That was quick.
Reinstall the battery in the boat. Make sure that you put the red on the positive post.
Great. Check the power at the starter solenoid on the red wire. Red meter lead to the red cables on the solenoid, black meter lead to a clean ground on the block. Test it both with the key off, and then in the start position. Turn the kill switch off, so the motor will not start. Let me know what you get there.
What make and model is the meter, I need to get a look at it.
20 on the DCV scale. The solenoid is part 9 in the diagram. It is on the front of the engine.
Yes that is it. Red meter lead to the post with the red covered wires on it.
Did you turn the key to start to engage the starter?
Yes, I need to know what the voltage is with the starter engaged.
Ok, more the red meter lead to the Yellow tipped wire on the solenoid and crank the engine over again. Them move the red meter lead to the other end of the yellow wire at the starter, crank it over again.
You are looking for voltage that is very close to 9.5V at each test point.
Your issue will be a failing starter. You can either replace that one with an after market one, have that one rebulit at a starter shop, or get an OEM starter. Do you need a part number?
You are getting good voltage at all the test points. What has to be happening is that when the starter gets hot from the engine running, the brushes do not make good contact with the armature, and therefore cannot spin the engine over.
That or the engine is locking up.
Yes. If the starter was engaging the flywheel, but unable to spin the engine over, it would hum. Good voltage is defined at as least 9.5V DC with the engine cranking over. We know that the battery is good, cables are good, solenoid is good. Only items left are starter or block. To eliminate the block, remove the spark plugs from the engine and look at the tips, are any of them slightly silver in color?
Starter is part 1 in the diagram.
To get back directly to me, you can either request me in the question page or lace my name in the question line. I am only online after 7 PM CST weekdays and most all day on the weekends. I spend my day hours in a busy repair shop.