On Mon, 1/9/17, Vladimir Sonsev sonsev52@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: RE: [Amel Yacht Owners] Yanmar 75HP - Cannot go over 2300 RPM
To: amelyachtowners@...
Date: Monday, January 9, 2017, 9:02 AM


 









Eric,
Thanks for your email. It is interesting.

I have my boat for one year.  The engine has more than
4,000 hours.  I don't know if bearings were replaced
before. I greased prop bearings 2 times. Prop blades rotate
freely. There is no play. There is no evidence of any
bearing damage.  What else could go wrong? Did you feel
anything wrong before you change the bears? Could you feel
any difference in blade rotation after the bearings change?

Vladimir

SM#345 "LIFE IS GOOD"

On Jan 9, 2017 1:00 AM,
"'sailormon' kimberlite@...
[amelyachtowners]" <amelyachtowners@...>
wrote:















 









I had the same problem
with Kimberlite. Even though when I hauled her and tried to
wiggle the blades of the autoprop they seemed normal. After
exhausting all other possibilities , I spend a day and
rebuilt the autoprop.Voila back to 3500 rpm.
I also rebuilt the prop at about 3500
hours.The autoprop is a
sensitive beast and the slightest out of balance will kill
your rpm.Fair
WindsEricKimberlite Amel Super
Maramu #376   From: amelyachtowners@yahoogroups.
com [mailto:amelyachtowners@
yahoogroups.com]
Sent: Monday,
January 09, 2017 12:18 AM
To: amelyachtowners@yahoogroups.
com
Subject: Re: [Amel Yacht
Owners] Yanmar 75HP - Cannot go over 2300
RPM   Hi Vlad and
Dominique,AutoProps require
regular maintenance.  If you haven't done that in a
couple of years, that may be your problem.  There are some
other threads on this forum that discuss this vis a vis low
rpm.  Just spinning the blades on the hub doesn't tell
you much.  They can feel perfectly free wheeling, and still
be a problem.If you don't run
your engine hard on a regular basis, you can get a serious
buildup of carbon in the turbo and exhaust elbow. 
That's the second place to
look.Let us know what you
find.Kent From: "Vladimir Sonsev
sonsev52@...
[amelyachtowners]" <amelyachtowners@yahoogroups.
com>
To: amelyachtowners@yahoogroups.
com
Sent: Sunday, January 8,
2017 11:21 PM
Subject: Re: [Amel
Yacht Owners] Yanmar 75HP - Cannot go over 2300
RPM  
Hi
Dominique, I also
have 75 HP YANMAR engine 4JH3-TE. I also can't develop
more than 2200-2500 RPM.
I am discussing
this problem with Autoprop.  I suspect that perhaps prop
provides to much torque
load.Autoprop ask me for transmission gear
ratio. The label on my transmission is gone. I requested
this information from Amel. I am waiting for a reply now.
Autoprop also ask me to conduct some
tests. I can't do the tests now because my boat is on
hard.
I will keep you
posted.Vladimir
SM#345
"LIFE IS GOOD" On Jan
8, 2017 10:26 PM, "songhui_ma@...
[amelyachtowners]" <amelyachtowners@yahoogroups.
com> wrote: 
Happy
New Year 2017 Yanmar
4JH3-TE - 3600 hours - 1500 hours
maintenance.  A New
Zealand mechanic replaced the injectors with Yanmar ones I
provided and sourced in the US [Niemiec] Both mechanic and my
US provider confirmed that it was the correct part
#.  However
and since I cannot go over 2300
RPM.The
smoke is pretty transparent neither black or
white.  I
browsed the internet, got a lot of ideas, but nothing which
jumped out.I suspect it is
related to the Turbo - over 2300 RPM - that I have not used
much and realized I should have.    Suggestions greatly
appreciated ThanksDominique S/V
Viva SM
#374 Opua,
NZ    






























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