Indmar 340 Assault only 2700 RPM at WOT

[Jhendrix39110]

Indmar 340 Assault will only reach 2700 RPM at WOT. I have replaced the fuel filter, cleaned K&N filter and replaced spark plugs. I checked fuel pressure and it is within spec. What should I try next?

[MJHKnox]

Indmar 340 Assault will only reach 2700 RPM at WOT. I have replaced the fuel filter, cleaned K&N filter and replaced spark plugs. I checked fuel pressure and it is within spec. What should I try next?

You might have a fault code that might be telling the motor "no-go". Try getting someone to hookup a scanner.

My next area would be plug wires, cap and rotor. Sounds like you have the spark plugs and fuel filter changed out. Those are the easiest parts.

[secondsupra2004]

Indmar 340 Assault will only reach 2700 RPM at WOT. I have replaced the fuel filter, cleaned K&N filter and replaced spark plugs. I checked fuel pressure and it is within spec. What should I try next?

Need more info.
Is it cutting out at 2700 RPM, or running smoothly just won't increase? Could be as simple as cable binding unless this is a newer electronic throttle control. What year is it?

[Jhendrix39110]

It is a 2008. Cranks easily and running smoothly but just won’t increase. I took it out this weekend with 8 passengers. Max RPM was approx 3000

[Turbinesurgeon]

Fuel pressure regulator?


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