yamaha 0x66 shut down

[Blue197320]

good news is steering is fixed. bad news is boat is still sad. we water tested again with mechanic today, swapped in a known good computer and have the same issue. by passed ecu controlled ground with same result. bypassed power with same result. eliminated a harness problem. good news is he is not giving up on the motor.

[Old'sCool]

I'm on my 4th OX66 motor and hope it never dies. Is there still an anti-siphon valve at the tank? Is the tank vent clear?

[Blue197320]

fuel starvation and fuel delivery issues have been eliminated. same result on an external tank

[hugo]

so your losing spark? realy need to read manuel and know how the safty systems work to have a good understanding of why it is shutting down.

[csurf]

Give these guys a call and ask for Chip (he's the owner).. they are Yamaha magicians and are always willing to help if you're a customer of not. If it's something they never encountered before they will bend over backwards to figure out the problem.

http://www.accuratemarine.net/

[Blue197320]

it is fixed! great fathers day present. the oxygen density sensor was the cause of the 4k rpm shut down. took it out today for a test and ran great with no issue at all.

[Snookerd]

Excellent! Great day to be out using that motor!