So, what should I check NEXT ??

[wmitch2]

2002 Optimax # OT468900

I've been having a slow to rev up on take off, then would "catch" and come up on RPM's and would plane out. I was running a 25* Trophy Plus with 2 holes open and 2 holes plugged full. I could only get 5100-5200 WOT and 52mph. I tried a 23* Trophy Plus with 4 medium plugs. It had instant response, but would top out at 5100-5200 and 50mph!!
Then went to a 24* Trophy Plus with 4 medium plugs and had instant response, but still would top out at 5100-5200 rpm's and 51-52 mph. I've tried running the 25* with open PVS and it would blow out. I've installed new plugs, had the idler checked and compression checked (100 on all cylinders). Seems like I can't get past 5200 RPM's !! What should I look at next.

[DewRonInc]

Bore scope for turned sleeves

[JOE54]

all sensors and switches spark on all 6 and or cyl drop test on water at lake to isolate problem cyl-s verify linkage set up ,engine height , unload boat to achieve max performance after resolve then load it and prop for 5800

[EuropeanAM]

all sensors and switches spark on all 6 and or cyl drop test on water at lake to isolate problem cyl-s verify linkage set up ,engine height , unload boat to achieve max performance after resolve then load it and prop for 5800

^^^^ Good advice.

What boat is this, BTW?

[wmitch2]

^^^^ Good advice.

What boat is this, BTW?

2002 Ranger 205 DVX

[lpugh]

Fuel/air pressures test on the water and available voltage test on all six, Ohm test wires and wet test for leaks

[EuropeanAM]

Another item to check is to make certain you are actually REACHING 100% (WOT) position. See FAQ Section: Hotfoot Setup

[wmitch2]

Another item to check is to make certain you are actually REACHING 100% (WOT) position. See FAQ Section: Hotfoot Setup

No hot foot, only hand throttle. Mechanic says it's set right. ???

[EuropeanAM]

Check it using the same methods at the engine end, just to confirm the throttle plate is opening fully.

[wmitch2]

Check it using the same methods at the engine end, just to confirm the throttle plate is opening fully.

Thanks, will do !!