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[Amel Yacht Owners] Amel propeller
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Bill & Judy Rouse <yahoogroups@...>
Chris, Be careful...early model Amel Super Maramus will not accommodate AutoProp. The C Drive was modified for an AutoProp to fit. Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School www.amelschool.com 720 Winnie St Galveston Island, TX 77550 On Fri, Jun 23, 2017 at 8:01 PM, Chris Shiels rettirc@... [amelyachtowners] <amelyachtowners@...> wrote:
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greatketch@...
Every SM came standard with two props, since having a spare was required for the Class Certification. A feathering prop was installed as the standard working prop on all boats, I believe, and a fixed prop was a spare.
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The standard feathering prop on the earlier SM's was a MaxProp, an Italian made three blade feathering propeller. Gives 98% of the motoring performance of the AutoProp for 10% of the hassle with fouling. Performance on any prop goes down dramatically when fouled, but the Autoprop can be especially sensitive. Does anybody know what hull number the switch was made? (Our #160 is a MaxProp). Bill R: Do you know what modification was made to the C-drive to accommodate the Autoprop? I am guessing the output shaft was lengthened... Bill Kinney SM160, Harmonie Highlands, NJ ---In amelyachtowners@..., <yahoogroups@...> wrote : Chris, Be careful...early model Amel Super Maramus will not accommodate AutoProp. The C Drive was modified for an AutoProp to fit. Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School www.amelschool.com 720 Winnie St Galveston Island, TX 77550
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Bill & Judy Rouse <yahoogroups@...>
Bill R: Do you know what modification was made to the C-drive to accommodate the Autoprop? I am guessing the output shaft was lengthened... Yes, I know...the C Drive case was modified to allow for a AutoProp blade to pass by the C Drive when the blade is at 90 degrees (feathered). If you place an AutoProp on an older model Amel SM, and start the engine, chances are you will destroy the AutoProp and the C Drive. Is that a good enough explanation?😀 Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School www.amelschool.com 720 Winnie St Galveston Island, TX 77550 On Sat, Jun 24, 2017 at 9:47 AM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:
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I have SM 243, Chris. What is your boat's hull number? Kent karkauai "at" yahoo "dot" com +1 828 234 6819 From: "'Bill & Judy Rouse' yahoogroups@... [amelyachtowners]" To: "amelyachtowners@..." Sent: Saturday, June 24, 2017 10:28 AM Subject: Re: [Amel Yacht Owners] Amel propeller Chris, Be careful...early model Amel Super Maramus will not accommodate AutoProp. The C Drive was modified for an AutoProp to fit. Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School www.amelschool.com 720 Winnie St Galveston Island, TX 77550 On Fri, Jun 23, 2017 at 8:01 PM, Chris Shiels rettirc@... [amelyachtowners] <amelyachtowners@...> wrote:
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On Kristy, the new MaxProp fit almost perfectly on the old shaft used for the AutoProp, There was less than a mil in a couple of spots that were trimmed on the MaxProp by a prop shop to make a perfect fit. Kent SM 243 Kristy From: "'Bill & Judy Rouse' yahoogroups@... [amelyachtowners]" To: "amelyachtowners@..." Sent: Saturday, June 24, 2017 11:16 AM Subject: Re: [Amel Yacht Owners] Amel propeller Bill R: Do you know what modification was made to the C-drive to accommodate the Autoprop? I am guessing the output shaft was lengthened... Yes, I know...the C Drive case was modified to allow for a AutoProp blade to pass by the C Drive when the blade is at 90 degrees (feathered). If you place an AutoProp on an older model Amel SM, and start the engine, chances are you will destroy the AutoProp and the C Drive. Is that a good enough explanation?😀 Best, CW Bill Rouse Admiral, Texas Navy Commander Emeritus Amel School www.amelschool.com 720 Winnie St Galveston Island, TX 77550 On Sat, Jun 24, 2017 at 9:47 AM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:
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greatketch@...
Exactly what I expected, and for the reason I imagined. :) The Autoprop blades have a couple more "degrees of freedom" than other feathering props!
Bill K |
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Chris Shiels <rettirc@...>
This is all now getting confusing!!!! Max Prop, Auto Prop, c-drives, fixed prop, let me throw Spurs into the equation. The boat we are buying is a 1998, SM 224. What prop would have come standard from the factory at this time? The original propeller had one of the blades depart. I believe that this prop is located at a local machine shop....if they can find it. Aka: minus one blade. I think I need to find out what this prop was before I proceed any further? There is a fixed pitched prop fitted at the moment, I imagine this is the factory item, however I was happy to see there was a rope cutter fitted also. I shall do a little research and try to request a picture of the original prop. During sea trial, we could not get maximum rpm out of the engine with the fixed prop, only 2800rpm, I need to investigate why. This was after pressure washing hull and cleaning the prop. I suspect it could be blocked after the turbo, or the turbo needs an overhaul. I shall investigate this later. We shall be moving to the boat (Thailand) later next month and want to organise as much as possible before we get there. I hope I don't abuse the forum, however I have now met 3 separate Amel owner and looking forward to meeting more. There are so many other questions I have but trying to do as much of my own research first. Regards Chris On 25 Jun 2017, at 3:40 AM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:
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John Clark
Chris, I havevan older SM with the fixed blade prop and a newer Volvo TMD 22 engine. Our max rpm is also 2800 with the fixed blade. The engine runs like a top and has zero smoke. Perhaps this is to be expected with the fixed blade prop? John Clark SV Annie. SM 37 Charleston, SC On Jun 24, 2017 6:12 PM, "Chris Shiels rettirc@... [amelyachtowners]" <amelyachtowners@...> wrote:
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Hi again Chris, Kristy is my first sailboat, and my first big boat. I was the absolute worst about asking questions that now seem straightforward. The folks on this group were happy to take me by the hand and explain in detail how to diagnose and repair everything I asked about. No question is regarded as too simple to answer. Without the group's help I probably would have given up after a year or two. While I've learned a lot, I still learn something new with every question posed and the answers given. Fire away, cousin Amelian! Kristy is SM 243, built in 1998-99. She came with a Volvo TMD22, 78 HP. There was an AutoProp and a fixed spare aboard. I spent $5000+ trying to figure out why she wouldn't get over 2300 rpm. (With the AutoProp OR the spare fixed prop). I finally got the numbers off the AutoProp, and Bruntons (AutoProp mfg) told me it was the prop recommended for an SM with the 100HP Yanmar. Amel said they used the same prop for both engines. I had the fixed prop checked by a prop shop and was told that it, too, was over-propped for my boat and engine. I had the fixed prop repitched per their recommendation, and voila! 3200 rpm. The only thing I didn't do was service the AutoProp, which I understand needs to be done every couple of years, even if the blades spin freely on the hub, and don't have noticeable wobble. Others have had the same problem of low rpm that was solved by servicing the prop. Amel sent me a one-page explanation of how they prop their boats which has as much to do with torque as horsepower. I think it is in the interest of efficiency. Somebody please correct me if I'm wrong about that. Bruntons also told me that the model AutoProp had been discontinued, and that new blades were no longer available. Hope that helps. Kent Robertson S/V Kristy SM 243 On Jun 24, 2017, at 5:51 PM, Chris Shiels rettirc@... [amelyachtowners] <amelyachtowners@...> wrote:
This is all now getting confusing!!!! Max Prop, Auto Prop, c-drives, fixed prop, let me throw Spurs into the equation. The boat we are buying is a 1998, SM 224. What prop would have come standard from the factory at this time? The original propeller had one of the blades depart. I believe that this prop is located at a local machine shop....if they can find it. Aka: minus one blade. I think I need to find out what this prop was before I proceed any further? There is a fixed pitched prop fitted at the moment, I imagine this is the factory item, however I was happy to see there was a rope cutter fitted also. I shall do a little research and try to request a picture of the original prop. During sea trial, we could not get maximum rpm out of the engine with the fixed prop, only 2800rpm, I need to investigate why. This was after pressure washing hull and cleaning the prop. I suspect it could be blocked after the turbo, or the turbo needs an overhaul. I shall investigate this later. We shall be moving to the boat (Thailand) later next month and want to organise as much as possible before we get there. I hope I don't abuse the forum, however I have now met 3 separate Amel owner and looking forward to meeting more. There are so many other questions I have but trying to do as much of my own research first. Regards Chris |
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Danny and Yvonne SIMMS
Hi Chris, if you have the Volvo TMD 22 78hp 2800rpm is the correct max revs. Many of us sweated over this for years without knowing this. I will say it again. 2800rpm is the correct max revs for the TMD 22 78hp Volvo Sent from my Vodafone Smart On 24 Jun 2017 23:51, "Chris Shiels rettirc@... [amelyachtowners]" <amelyachtowners@...> wrote:
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Danny and Yvonne SIMMS
Hi again Chris, I got so excited about the rpm ,I forgot to tell you that if the prop with a missing blade is a auto prop you can buy new blades for it from Bruntons the manufacturer. Either singly or all of them. Sent from my Vodafone Smart On 24 Jun 2017 23:51, "Chris Shiels rettirc@... [amelyachtowners]" <amelyachtowners@...> wrote:
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ianjenkins1946 <ianjudyjenkins@hotmail.com>
Hi Chris ,
If you have the 78hp Volvo , which I guess you do , Amel governed it down to 60hp ,2800 revs , because above that you are just burning fuel to no effect . At 2800 with a clean hull and prop on a flat calm day you should get over
8 k , maybe 8.5
Ian and Judy , Pen Azen ,SM 302 , Italy
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