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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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My mercruiser turns over slow and wants to back spin when

Customer Question

My mercruiser turns over slow and wants to back spin when let off key is that timing
Submitted: 1 year ago.
Category: Boat
Expert:  Jason replied 1 year ago.

Hi Joel, my name is Jason.

The slow turning cover can be a bad battery, low voltage to the starter, or a bad starter. Do you have a voltmeter and do you know how to take voltage measurements?

Customer: replied 1 year ago.
It is low voltage also I am only getting 9.5 volts when it is trying to turn over new battery's new wires to starter and new starter and relay on side of block the wiring is jerry rigget really bad were would I start to they make wire harnesses for the hole boat 1986 searay seville
Expert:  Jason replied 1 year ago.

At one point they made a wiring harness but it won't be available if the boat is an 86. Somebody good with electrical would have to go through it. The engine should be spinning over quickly with 9.5V if its not, the starter motor is going to be bad.