[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. 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. Vladimir
On Jan 8, 2017 10:26 PM, "songhui_ma@... [amelyachtowners]" <amelyachtowners@...> wrote:
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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:
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sailormon <kimberlite@...>
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@...>
Hi Dominique, I also have 75 HP YANMAR engine 4JH3-TE. I also can't develop more than 2200-2500 RPM. 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. Vladimir
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
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VLADIMIR SONSEV
Eric, Thanks for your email. It is interesting. Vladimir
On Jan 9, 2017 1:00 AM, "'sailormon' kimberlite@... [amelyachtowners]" <amelyachtowners@...> wrote:
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Alexandre Uster von Baar
Good morning Vladimir,
toggle quoted messageShow quoted text
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@... [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 #yiv0511156626 #yiv0511156626 -- #yiv0511156626ygrp-mkp { border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;} #yiv0511156626 #yiv0511156626ygrp-mkp hr { border:1px solid #d8d8d8;} #yiv0511156626 #yiv0511156626ygrp-mkp #yiv0511156626hd { color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;} #yiv0511156626 #yiv0511156626ygrp-mkp #yiv0511156626ads { margin-bottom:10px;} #yiv0511156626 #yiv0511156626ygrp-mkp .yiv0511156626ad { padding:0 0;} #yiv0511156626 #yiv0511156626ygrp-mkp .yiv0511156626ad p { margin:0;} #yiv0511156626 #yiv0511156626ygrp-mkp .yiv0511156626ad a { color:#0000ff;text-decoration:none;} #yiv0511156626 #yiv0511156626ygrp-sponsor #yiv0511156626ygrp-lc { font-family:Arial;} #yiv0511156626 #yiv0511156626ygrp-sponsor #yiv0511156626ygrp-lc #yiv0511156626hd { margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;} #yiv0511156626 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sailormon <kimberlite@...>
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. Vladimir
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@...]
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@...>
Hi Dominique, I also have 75 HP YANMAR engine 4JH3-TE. I also can't develop more than 2200-2500 RPM. 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. Vladimir
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
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