Volvo Penta saildrive 120se has developed a sudden fault. Loss of power and weird noise.

[jbm1967]

Hi, my saildrive has developed a sudden fault. It has very little power (just a little at low revs). It is making a not good noise. Sounds like the prop is hitting something. The prop will rotate by hand when in gear but does rotate slowly when engine is running in both forward and reverse but hardly any power and does not increase much with revs. Could this be the rubber coupling inside the prop? Or something more serious? How best to check? Are these saildrives easily rebuilt or best to look for a second hand one if its actually the saildrive? Oil looks clean and is changed regularly. Thanks for any advice.

 

[ChromeDome]

No experience but my attention would be drawn to internal conical clutch.

Saildrive clutch slip?

 

[Martin_J]

I'd take the linkage off (fwd, neutral, reverse) at the gearbox end first..

Then check that the forward, neutral and reverse positions for the gearbox lever line up exactly with the control cable positions.

If any position is out slightly, the gearbox cones will not be in their correct positions, leading to possible drag or noise.

 

[Tranona]

Your instincts are probably right. The bush in the prop is first port of call, Probably picked up a plastic bag and just enough to finally break a decaying bush.

 

[VicS]

Hi, my saildrive has developed a sudden fault. It has very little power (just a little at low revs). It is making a not good noise. Sounds like the prop is hitting something. The prop will rotate by hand when in gear but does rotate slowly when engine is running in both forward and reverse but hardly any power and does not increase much with revs. Could this be the rubber coupling inside the prop? Or something more serious? How best to check? Are these saildrives easily rebuilt or best to look for a second hand one if its actually the saildrive? Oil looks clean and is changed regularly. Thanks for any advice.

If it is anything more serious that the prop hub you might need the workshop manual
https://www.plaisance-pratique.com/IMG/pdf/VolvoMS2-SD120_manual.pdf

 

[jbm1967]

If it is anything more serious that the prop hub you might need the workshop manual
https://www.plaisance-pratique.com/IMG/pdf/VolvoMS2-SD120_manual.pdf

Thank you

 

[jbm1967]

It was the propeller hub. £550 later and my Labour while beached over a few days and it’s all sorted.