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[Amel Yacht Owners] Engine-Autoprop problem
Joel F. Potter <jfpottercys@...>
Dear Dimitris:
What I am about to relate may seem hard to believe but it is absolutely true. A few years ago I had symptoms exactly identical to yours. I had my fuel tested, tested flow rates on my Racor filters and had the best diesel man in town check my engine and fuel system. All was O.K. Believing that any repair would be a dreadful ordeal, I called Jacques Carteau at Amel. I enjoy a good relationship with Jacques and he gets great pleasure out of teasing me. When he told me to clean my propeller I was sure he was joking. He insisted and told me that the AUTOPROP is particularly sensitive to ANY GROWTH, even a small amount. Feeling ridiculous and being certain I was the victim of a joke, I dove on my boat and, believe it or not, there were several small gooseneck barnacles, most of them on just one of the blades. I cleaned them off and used sand paper to polish off their "footprint". The engine problems disappeared immediately. How can this be? To make a long story short, the AUTOPROP works as well as it does and is extremely efficient due to the unusual shape of the propeller blades. The blades, though not interconnected must work in complete symmetry/unison. If any one blade is more fouled than another, that effects it's "pitch" or angle of operation. The vortex of water coming off this blade then causes the other blades to change pitch...it's complicated but I hope you can understand the relationship. I hope this will eliminate your problems. Remember, the prop must be perfectly clean on all three blades. As a proof to this, last week I sold an 8 month old SUPER MARAMU that sat at a dock here in Fort Lauderdale for two months. When we pulled the boat out of the water, the propeller was fouled, but pretty evenly on all three blades. The boat would only go 4 knots at 2000 max R.P.M. and there was a noticeable increase in vibration. Once clean, all was normal. Let me know how you solve your problem, please. Good luck! Joel F. Potter SUPER MARAMU #400 "MARY BROWN"
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eric freedman
Joel,
That's amazing-thanks for the info. Eric _____ From: Joel F. Potter [mailto:jfpottercys@worldnet.att.net] Sent: Friday, August 06, 2004 11:15 AM To: amelyachtowners@yahoogroups.com Subject: RE: [Amel Yacht Owners] Engine-Autoprop problem Dear Dimitris: What I am about to relate may seem hard to believe but it is absolutely true. A few years ago I had symptoms exactly identical to yours. I had my fuel tested, tested flow rates on my Racor filters and had the best diesel man in town check my engine and fuel system. All was O.K. Believing that any repair would be a dreadful ordeal, I called Jacques Carteau at Amel. I enjoy a good relationship with Jacques and he gets great pleasure out of teasing me. When he told me to clean my propeller I was sure he was joking. He insisted and told me that the AUTOPROP is particularly sensitive to ANY GROWTH, even a small amount. Feeling ridiculous and being certain I was the victim of a joke, I dove on my boat and, believe it or not, there were several small gooseneck barnacles, most of them on just one of the blades. I cleaned them off and used sand paper to polish off their "footprint". The engine problems disappeared immediately. How can this be? To make a long story short, the AUTOPROP works as well as it does and is extremely efficient due to the unusual shape of the propeller blades. The blades, though not interconnected must work in complete symmetry/unison. If any one blade is more fouled than another, that effects it's "pitch" or angle of operation. The vortex of water coming off this blade then causes the other blades to change pitch...it's complicated but I hope you can understand the relationship. I hope this will eliminate your problems. Remember, the prop must be perfectly clean on all three blades. As a proof to this, last week I sold an 8 month old SUPER MARAMU that sat at a dock here in Fort Lauderdale for two months. When we pulled the boat out of the water, the propeller was fouled, but pretty evenly on all three blades. The boat would only go 4 knots at 2000 max R.P.M. and there was a noticeable increase in vibration. Once clean, all was normal. Let me know how you solve your problem, please. Good luck! Joel F. Potter SUPER MARAMU #400 "MARY BROWN" Yahoo! Groups Sponsor ADVERTISEMENT <http://us.ard.yahoo.com/SIG=1291judd2/M=296967.5286862.6394559.3294649/D=gr oups/S=1705065792:HM/EXP=1091891521/A=2196952/R=2/id=noscript/SIG=1304ck1na/ *http:/www.sodaclubusa.com/referrer.asp?redirect=rv_boat_camp.asp&referrer=0 002_0015_0178_0002%20> <http://us.a1.yimg.com/us.yimg.com/a/so/sodaclub/alternate_320x250_061504.jp g> <http://us.adserver.yahoo.com/l?M=296967.5286862.6394559.3294649/D=groups/S= :HM/A=2196952/rand=456273910> _____ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/amelyachtowners/ * To unsubscribe from this group, send an email to: amelyachtowners-unsubscribe@yahoogroups.com <mailto:amelyachtowners-unsubscribe@yahoogroups.com?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! <http://docs.yahoo.com/info/terms/> Terms of Service.
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Anne and John Hollamby <hollamby@...>
Message text written by INTERNET:amelyachtowners@yahoogroups.com
<I am hoping that Dimitris will tell us whether and how he has solved the engine problem, it certainly sent me under the boat to polish the prop to gleaming bright with 100 wet and dry sandpaper. On a minor note the macerator pump on our aft head started leaking after about two and a half years liveaboard use. I replaced the seal with Jabsco part no 90197-0000. Doing this I found that the pumps in both heads had been wrongly assembled and thus likely to damage the motors when the seals start leaking. The motor is black and bolted on to it is the pump assembly which can be fitted in two ways. The correct way will place the weep holes at the bottom and the top of the motor and the incorrect way will place them horizontally as my ones were. This means that when the seal goes the back end of the pump casig will fill to half way before the leaky "water" can escape thus immersing the front bearing. It is not difficult to remove the whole assembly and correct the fault before any damage is done. Best wishes from the new headmaster, John on Bali Hai SM 319
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Krassopoulos Dimitris <dkra@...>
Dear John,
Regarding the problem I had I am pretty sure that there is a propeller problem. I have to dive under the boat in clear water to polish the propeller. I will inform everybody if something changes after that. I have exactly the same problem with the aft head. I will check according to your instruction. Alma Libre SM 2000 _____ From: Anne and John Hollamby [mailto:hollamby@compuserve.com] Sent: Monday, August 23, 2004 1:57 PM To: INTERNET:amelyachtowners@yahoogroups.com Subject: RE: [Amel Yacht Owners] Engine-Autoprop problem Message text written by INTERNET:amelyachtowners@yahoogroups.com <I am hoping that Dimitris will tell us whether and how he has solved the engine problem, it certainly sent me under the boat to polish the prop to gleaming bright with 100 wet and dry sandpaper. On a minor note the macerator pump on our aft head started leaking after about two and a half years liveaboard use. I replaced the seal with Jabsco part no 90197-0000. Doing this I found that the pumps in both heads had been wrongly assembled and thus likely to damage the motors when the seals start leaking. The motor is black and bolted on to it is the pump assembly which can be fitted in two ways. The correct way will place the weep holes at the bottom and the top of the motor and the incorrect way will place them horizontally as my ones were. This means that when the seal goes the back end of the pump casig will fill to half way before the leaky "water" can escape thus immersing the front bearing. It is not difficult to remove the whole assembly and correct the fault before any damage is done. Best wishes from the new headmaster, John on Bali Hai SM 319 Yahoo! Groups Sponsor ADVERTISEMENT <http://us.ard.yahoo.com/SIG=129jt81ec/M=295196.4901138.6071305.3001176/D=gr oups/S=1705065792:HM/EXP=1093345074/A=2128215/R=0/SIG=10se96mf6/*http://comp anion.yahoo.com> click here <http://us.adserver.yahoo.com/l?M=295196.4901138.6071305.3001176/D=groups/S= :HM/A=2128215/rand=383652002> _____ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/amelyachtowners/ <http://groups.yahoo.com/group/amelyachtowners/> * To unsubscribe from this group, send an email to: amelyachtowners-unsubscribe@yahoogroups.com <mailto:amelyachtowners-unsubscribe@yahoogroups.com?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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