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Dominick
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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1997 mercruiser 5.7 carberated. Won't turn over but it did

Customer Question

1997 mercruiser 5.7 carberated. Won't turn over but it did start once. Slave solinoid?
Submitted: 2 years ago.
Category: Boat
Expert:  Tan replied 2 years ago.
Hello. Do you have a volt meter to do some voltage tests?
Customer: replied 2 years ago.
Yes
Expert:  Tan replied 2 years ago.
Ok go to the battery cable connection on the starter test the voltage when cranking the engine. What is the voltage reading?
Customer: replied 2 years ago.
13 volts
Expert:  Tan replied 2 years ago.
Did you do the test when cranking the engine? If yes we need to test the voltage at the circuit breaker on the engine both terminals. Do you have voltage?If yes then locate the primary start solenoid C on the top of the engine. Now jump to 2 large terminals together does the engine crank? http://i.imgur.com/v6ikNFi.jpg
Customer: replied 2 years ago.
No reading at the breaker. 13 v at solinoid
Expert:  Tan replied 2 years ago.
Did you test for voltage on both terminals of the breaker? If yes then you have a blown fuse on the starter. Could I get the engine serial number please?
Customer: replied 2 years ago.
14098242
Expert:  Tan replied 2 years ago.
Do you have no voltage on both terminals of the breaker D? http://i.imgur.com/v6ikNFi.jpg That isn't a good serial number. You should have 2 letters and 6 numbers.
Customer: replied 2 years ago.
Ok146688
Customer: replied 2 years ago.
No voltage either terminl.
Expert:  Tan replied 2 years ago.
Ok check at the starter terminal is there a red wire connected to the main terminal? This will be a smaller wire than the battery cable. You should have a red and an orange wire are they both connected?. The wires should be connected to a fuse like this one. http://bpi.ebasicpower.com/c/MER10G/graphics/00000001/MAL9-15510.jpg Do you have voltage at this connection?
Customer: replied 2 years ago.
Yes. 13v
Expert:  Tan replied 2 years ago.
Do you have voltage on the small terminal of the fuse? If yes then you have a break in the red wire coming from the starter to the circuit breaker. Run a 10 gauge wire from the starter to the circuit breaker does the engine crank now?