Congratulations on your new Amel, and welcome to
the Amel family.
If you search this forum you will find several
threads about this problem. I had a TMD22 on Kristy, SM243
that I bought in 2009 when she had 3000 hours of engine time..
I could only get her up to 22-2300 rpm. I spent thousands
trying to get the rpm up to 3000. All mechanics said the
engine was fine, except for the fact that the turbo was fouled
and had to be replaced, repaired, and replaced again in the
first 3000 hours (A result of running at low rpm).They all
thought it was over-propped. I told them that it was the
original H6 prop and the original fixed spare prop supplied by
Amel. When I called Brunton (AutoProp company), they told me
it was what they recommend for a SM with 100HP Yanmar. When I
asked Amel about it, they said they sold SMs with the same
prop for both engines, and said that it worked fine with the
Clean hull and prop, if all seems OK except the
rpms, service the prop first. Even if the blades spin
freely, others have said that servicing the prop solved the
If that doesn't solve it, check the engine for
common problems. Fuel, Air, compression, valve lash, turbo
function, exhaust elbow constriction...
If everything checks out OK, consider trying
your fixed spare prop, if it still won't get up to 3000rpm,
have that prop checked by a good prop shop with your boat's
specs and see what they think about its size and pitch for
your boat. I was told that my spare prop was also
significantly over pitched and oversized. I had it cut down
and repitched to their recommendations. Voila! 3000rpm. The
Auto Prop of 1999 vintage could not be altered, so I bought a
MaxProp and have been very happy with it for 6 years. When I
repowered a year later, I was able to repitch the MaxProp for
the new 110HP Yanmar 4JH4HTE.
Good luck and let us know what you find.
On Jun 25, 2020 10:10 AM, JOSE
Hello Amelians! I am in the
process of learning my boat. The engine is a Volvo
TMD22, with autoprop h6 propeller.
I found some threads here on the forum related to this
topic, but none conclusive about what is the ideal
cruise rpm regime, and what is the maximum rpm? I can't
get more than 2100 rpm!
SV Wayag, SM 323
Currently Alicante, Spain
Q me s me