Topics

[Amel Yacht Owners] Yanmar 75HP - Cannot go over 2300 RPM


VLADIMIR SONSEV
 

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@...> 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


Thanks

Dominique 

S/V Viva 

SM #374 

Opua, NZ 




karkauai
 

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]"
To: amelyachtowners@...
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@...> 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

Thanks
Dominique 
S/V Viva 
SM #374 
Opua, NZ 





eric freedman
 

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 Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Monday, January 09, 2017 12:18 AM
To: amelyachtowners@...
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@...>
To: amelyachtowners@...
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@...> 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

 

Thanks

Dominique 

S/V Viva 

SM #374 

Opua, NZ 

 

 

 


VLADIMIR SONSEV
 

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 Winds

Eric

Kimberlite 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

 

Thanks

Dominique 

S/V Viva 

SM #374 

Opua, NZ 

 

 

 


Alexandre Uster von Baar
 

Good morning Vladimir,

When you purchase the boat, were you able to excel 2300 rpm?

I have the Volvo TMD 22 P (rated at 78 HP at 4500 rpm), moving I am not able to exceed 2400 rpm.
If I am fully stop, then I can increase the throttle then exceed 2400, but as the boat starts moving forward the rpm will decrease.
My understanding is that it is typical of the Super Maramu, if my memory is correct due to over sized propeller.
Kent had his propeller re pitched to solve that issue.

Note: careful not to exceed 90% of your throttle. Example if you are standing still, get 2800 rpm then as you start moving the rpm decrease, you will need to reduce the throttle accordingly until you see a little drop on the rpm.

I had my Auto prop completely rebuilt 2 years ago and it did not make any difference in my case.
I was told the Auto Prop should be rebuilt every 2000 hours or 10 years (and of course greased at every haul out).

If you previously were able to exceed the 2300 rpm, then make sure your propeller is very clean.
Last August in San Juan, there was lots of growth, and I could not exceed 1350 rpm - after diving and cleaning was back to 2400 rpm.
You would be surprised how little growth will make such difference on performance.

If you were previous able to exceed 2300 rpm, it is also possible your boat is more loaded/heavier and that will penalize you as well.


Sincerely, Alexandre
SM2K #289 NIKIMAT
Harbor View Marina, Tortola, BVI





--------------------------------------------

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

Subject: RE: [Amel Yacht Owners] Yanmar 75HP - Cannot go over 2300 RPM
To: amelyachtowners@yahoogroups.com
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@optonline.net
[amelyachtowners]" <amelyachtowners@yahoogroups.com>
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@gmail.com
[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@yahoo.com
[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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eric freedman
 

Vladimir,

There was no significant difference between the before and after bearing change .

However the engine gained 1000 RPM’s. I believe the difference cannot be detected when the boat is on the hard but when the prop is turning 1000 rpm I am sure that makes the difference.

 

Where are you located?

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Monday, January 09, 2017 10:03 AM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] Yanmar 75HP - Cannot go over 2300 RPM

 

 

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 Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Monday, January 09, 2017 12:18 AM
To: amelyachtowners@...
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@...>
To: amelyachtowners@...
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@...> 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

 

Thanks

Dominique 

S/V Viva 

SM #374 

Opua, NZ