Gill6287

I'm fairly new to boat this big was told when I bought it that it would to 60 + at 5000 rpms but the fastest all trimmed out I can get is 54 at 6000 rpm the prop is a 23p any help is appreciated

F-2 Speedy

iTrader: (6)

unless its modified it should max out around 5200,if your getting to 6k its over trimmed.............60 @ 5k seems right

Gimme Fuel

That motor is limited at 5150-5200. It can NOT even spin to 6000. Computer wont let it. Is the tachometer accurate? Is this GPS speed at 54 mph?

SB

iTrader: (1)

Totally agree.

OP make a typo ? If not, is tach set on 6cyl by mistake ?

Gill6287

Thanks guys I will check these things and check back thanks so much and it was with handheld gps 54 every time

VoodooRob

Tabs all the way up and outdrive trimmed at neutral once on plane to set a base line? That boat with 23 prop and 502 should run 60 mph all day at 5,100-5200 RPM.

Hook'em

+1, and it will run several MPH faster with that power. Sounds like you've got several things to check, tach being the first on the list. You may also be experiencing high slip or blow out from over trimming. That wheel is easy to blow out. Get some accurate numbers i.e. GPS speed @ RPM starting at planing speed and every 500 RPM up to WFO.Then we can calculate prop slip and get an idea.

Gill6287

Thank you can't get to lake till Friday but will start with tach thanks so much

Griff

What model 23" 3 blade prop????

Gill6287

Mirage I believe 3 blade think its stock prop