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2007 Mercury Optimax 75 HP

LPMarine

New member
Hello everone. I am in need for help before I have to put my boat in the shop. So situation. My motor will turn over but not start. The last time I took her out. She came off the trailer fine. She ran to my first waypoint fine. When I got up to change spots. I started her up. Just fine. She idled for about 40 seconds. Then she died. And she has not started since. So these are the things I have checked and done.

Checked fuses. All of them are good.
Checked fuel and fuel lines. No kinks. No rubber deterioration.
Checked spark plugs and ignition coils. Getting fire.
Replaced injectors.
Tore apart fuel/water separator. No trash inside.
Tested the low pressure and high pressure pumps inside separator.
Pulled spare fuel pump. No trash. No tears in the diaphragm.
Took apart air compressor. No damaged leaves inside.

What else can prevent my motor from running. Thank you all.
 
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