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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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Have a (99) 6v92 mechanical detroit diesel & not getting the

Customer Question

have a (99) 6v92 mechanical detroit diesel & not getting the 12volts that goes to alternator (on regulator terminal) to excite -(after engine is running) to start charging - My other engine shows 12volts after engine is running which excites alternator to start charging - engine must be running to accomplish - what is in line of that 12v suppy that would not allow 12v to flow ? oill press safety ?
Submitted: 1 year ago.
Category: Boat
Expert:  Diesel Boat Doc replied 1 year ago.

Hi it should be a Hobbs switch located on the secondary fuel filter head. Normally open 25psi. hope this helps

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