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Tan
Tan, MerCruiser Certified Technician
Category: Boat
Satisfied Customers: 10900
Experience:  40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.
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Maxim 1800 SR3 - no power to the key switch

Customer Question

Maxim 1800 SR3 - no power to the key switch
Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello. My name is Tan.

Have you tried resetting the circuit breaker on the engine? The red button near the carburetor.

Do you have a volt meter to do some voltage tests if breaker doesn't help?

Customer: replied 1 year ago.
Breaker is not popped. Everything else works accessories trim motor etc
Expert:  Tan replied 1 year ago.

Ok we need to check for voltage on both terminals on the circuit breaker. Can you test voltage here?

Customer: replied 1 year ago.
No, we will have to resume later.
Thanks
Expert:  Tan replied 1 year ago.

Ok get a meter and check for voltage at the breaker. If you have voltage on one terminal the breaker is bad. If you have no voltage at either terminal then the fuse on the starter is bad.

The fuse #8 is located on the large terminal of the starter along with the battery cable connection.

This fuse is protection in case battery cables are connected wrong or the cable are loose and arcing. This is the most common issue when you have no voltage at the key switch.

http://www.marineengine.com/parts/mercruiser-sterndrive-parts/43l-mpi-alphabravo/0w650000-thru-1a063239/starter-motor

Post back with questions and findings.

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