5500 Rpm at wot trimmed up 45mph ish

[Sevenscrew]

At wot and trim up I get 42-45 ish mph but am at 5500 Rpms is this normal?

 

[ziggy]

Re: 5500 Rpm at wot trimmed up 45mph ish

read this ss. then bring in some facts for us so some folks here can help ya out.

 

[Bt Doctur]

Re: 5500 Rpm at wot trimmed up 45mph ish

Maybe for a jet-ski, what is it?

 

[thumpar]

Re: 5500 Rpm at wot trimmed up 45mph ish

Depends on what you are driving. If it is a car I would say no. If it is a boat maybe.

 

[Sevenscrew]

Re: 5500 Rpm at wot trimmed up 45mph ish

Mercruiser 3.0 lx 135? hp alpha one
Bowrider 17 foot. 92

Soorry can't tell u the model or serial it's rubbed off the air hat

 

[thumpar]

Re: 5500 Rpm at wot trimmed up 45mph ish

RPM seems pretty high. Is that GPS speed?

 

[Sevenscrew]

Re: 5500 Rpm at wot trimmed up 45mph ish

That's what the dash is saying.

 

[thumpar]

Re: 5500 Rpm at wot trimmed up 45mph ish

RPM should be in the mid 4000 range. Also check speed with GPS. What prop are you running?

 

[Sevenscrew]

Re: 5500 Rpm at wot trimmed up 45mph ish

How would I lower the Rpms? Different prop?

 

[ziggy]

Re: 5500 Rpm at wot trimmed up 45mph ish

wot spec for a 92 3.0lx is 4400-4800 per s/m 13. so imho, something is amiss. tach reading wrong, or really is turning that rpm in which case ya'd want a steeper pitched prop. or maybe your trimmed out to much and yer ventilating the prop getting the high rpm readings.
what does the tach read when your not trimmed out high? does that bring the rpm down into specs?

 

[Sevenscrew]

Re: 5500 Rpm at wot trimmed up 45mph ish

Ill get back to you Wednesday . When I have it out again

 

[Don S]

Re: 5500 Rpm at wot trimmed up 45mph ish

If you was under propped enough to be 1000 rpm to high, you wouldn't be seeing 45 mph.
You have tach issues.