Mercruiser 3ltr 135hp over revving loss of speed?

[cake7]

Hi, I have a Bayliner 175 with an inboard Mercruiser 3lt 135HP 2003 model, I have a problem with the prop thrust when turning the boat either way, in that the engine rev's higher and it sound like a car clutch slipping with the trust from the prop?, not sure if this is caused by a clutch of sorts? but pulling a wake boarder out of the water with the trim set at a quarter causes the engine to rev higher and a loss of thrust until the trim is brought down to it's lowest setting please can anyone shed some light into this???? Is it normal???

 

[Don S]

Re: Mercruiser 3ltr 135hp over revving loss of speed?

That's why they have a trim button, so you can adjust to conditions.

 

[achris]

Re: Mercruiser 3ltr 135hp over revving loss of speed?

You are trimmed too high. For skiing and wake boarding, trim the leg all the way IN for take-off and as the speed increases, trim out slightly to stop 'bow-steering'.<br /><br />Chris..........

 

[cake7]

Re: Mercruiser 3ltr 135hp over revving loss of speed?

Good advise, but that doesn't explain why the prop looses power when turning, or the engine revving quicker until I re-trim the stern leg or is this normal? is there a clutch type assemble in the gearbox ???? thanks for your help.

 

[Don S]

Re: Mercruiser 3ltr 135hp over revving loss of speed?

When you turn real sharp, the prop comes out of the water. Think about how the boat tips.

 

[achris]

Re: Mercruiser 3ltr 135hp over revving loss of speed?

Originally posted by Kai Manuel:<br /> ...but that doesn't explain why the prop looses power when turning, or the engine revving quicker until I re-trim the stern leg

It explains it perfectly! The prop doesn't lose power, it loses grip on water, because air is being sucked in.<br /><br />The clutch in the leg is a dog clutch.<br /><br />Chris..........

 

[waterone1@aol.com]

Re: Mercruiser 3ltr 135hp over revving loss of speed?

Just throwing a "third" vote behind the previous posts. Trimming up a "quarter" is a-lot when not pulling anything.....pulling a tube or skier and turning....get that drive down.