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Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3980
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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2005 mercruiser 5 L ser.ow382183 loss of top end power

Customer Question

2005 mercruiser 5 L ser.ow382183 loss of top end power .after warm up engine goes into limp mode with a continues alarm .fuel pump rail pressure is 40 psi at all rpm any ideas
Submitted: 2 years ago.
Category: Boat
Expert:  Charles replied 2 years ago.

Hello, my name is***** will assist you today.

When you get the solid horn on the engine there are two codes that it could be. One is low oil pressure and the other is overheat. For the oil pressure, make sure that it is good on the gauge when the engine is running. For the water pump, if you have not done an impeller this year, you should do so. Even if you have , but have run through a bunch of sand, that can take out an impeller.

Customer: replied 2 years ago.
Oil pressure 40 @ idle [email protected] 3400 new impeller temp stays at 155
Expert:  Charles replied 2 years ago.

Did you verify the temp using an hand held IR thermometer?

Customer: replied 2 years ago.
No will try asap
Expert:  Charles replied 2 years ago.

Thanks, ***** ***** temp right at the thermostat housing and on the sides of the block.

Customer: replied 2 years ago.
Will test on Monday .may I
Expert:  Charles replied 2 years ago.

Sounds good. I am online after 6PM CST weekdays. I do have a day job as well.

Customer: replied 2 years ago.
Thanks for your time
Expert:  Charles replied 2 years ago.

Your welcome. Please let me know what you find out. All that you have to do is reply back to this thread.