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Matt
Matt, Engineer
Category: Small Engine
Satisfied Customers: 21372
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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General of9145 low oil pressure shut down, just changed oil

Customer Question

General of9145 low oil pressure shut down, just changed oil and filter, level good, is switch bad? Generator 10 years old
Submitted: 8 months ago.
Category: Small Engine
Customer: replied 8 months ago.
It's a Generac of9145 auto magic home standby generator
Customer: replied 8 months ago.
Automatic, damm auto correct!
Expert:  Matt replied 8 months ago.

Hello

I'd 1st suggest measuring the actual oil pressure with seperate mechanical gauge - this can be plumbed into the engine via the current pressure switch port - if you use a Tee piece you can keep the pressure switch plumbed in as well and so see if the low pressure light corresponds to a low pressure reading.

As its intermittant and you have no rumbling or rattling noises from the engine its likely to be an electrical fault so 1st check the connection to the pressure switch is bright and clean and check back along the switch wiring for any signs of damage to the insulation

As if the wire is grounded out at any point then this will also turn on the light.

If you do have a low pressure reading ( should be 4 bar (59psi) at 2000rpm) and to turn on the light it will be very low about 5psi then replace the oil pump and ensure that the pump pickup in the sump hasn't come loose or is blocked

Expert:  Matt replied 8 months ago.

Hi

do you still need help?

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