2004 optimax 225 high idle

[Michael Beaty]

Made a long run back to the ramp last week. Once I made it to the ramp “luckily” the motor died serpentine belt appeared to have busted from dry rot. Air compressor tested fine.

Installed the new belt today. Motor starts on demand but instantly revs to 3000+ rpms. Any ideas as to what can be causing this? I have changed the belt before on a friends opti and didn’t have this issue. Thanks

2004 optimax 225 dfi
serial # OT 961388

note: I have checked throttle cable nothing appears stuck.
this is on muffs not in the lake.

thanks for the help.

[JOE54]

possible torn diaphram in rail check for fuel in air side of system at shrader valve

[Michael Beaty]

Forgot to mention I checked the rails already

[Savage]

Tracker valve diaphragm.
Throttle returning to the idle stop.

[Michael Beaty]

Tracker valve diaphragm.
Throttle returning to the idle stop.

yes it is returning to idle.

[EuropeanAM]

Are you sure it's not just raw fuel remaining in the system from the lack of air pressure (when belt failed)?

[JOE54]

+1 ^^^^^ fire it a couple times see if it settles out bet it smokes when you fire it dont it and runs real rough

[Michael Beaty]

Yep raw fuel left in system. Got it to the lake idled high for a bit died. Started right back up and never had an issue. Thanks guys

[EuropeanAM]

A couple of us have been there, done that. Soon becomes second nature to just be ready to shut it right down after certain "scenarios" that can cause it.