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#1
posted to rec.boats.cruising
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Clutch Control Problem
My 1978 San Juan 28 has a Yanmar 15hp diesel and a Morse control - a
single throttle lever for forward and aft, and a push in-pull out button for the clutch - you push it in to engage, out for neutral. I'm having trouble finding the neutral spot when I need to disengage the clutch. The throttle control is very notchy around the neutral area. I find myself fiddling with the controls when I'm 20 feet from the dock and wanting to drift in. The levers connecting to the clutch and throttle cables are a bit stiff despite plenty of lubrication. The business ends on the transmission and the engine seem to be working fine. The cables are probably the originals but they seem to move freely enough in their tubes. I think the problem is right behind the control panel, but I can't see how to fix it. Any suggestions would be welcome. Thanks in advance Richard Isherwood Windspirit, SJ 28 - 118 Port Townsend WA |
#2
posted to rec.boats.cruising
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Clutch Control Problem
On Sat, 31 May 2008 12:07:53 -0700 (PDT), "
wrote: My 1978 San Juan 28 has a Yanmar 15hp diesel and a Morse control - a single throttle lever for forward and aft, and a push in-pull out button for the clutch - you push it in to engage, out for neutral. I'm having trouble finding the neutral spot when I need to disengage the clutch. The throttle control is very notchy around the neutral area. I find myself fiddling with the controls when I'm 20 feet from the dock and wanting to drift in. I don't really understand your problem - on any marine diesel I've used with a single lever control, including a Yanmar 2GM, the clutch control was only used when starting and warming up the engine - it allowed you to advance the throttle without engaging forward or reverse gear. There was no need to touch the clutch control while manoeuvering - simply putting the control lever in the center detent would disengage the clutch, and set the engine speed to idle. If the engine normally remains in gear with the control lever in the center position, the shift cable is misadjusted, or the control lever mechanism that drives the shift cable is malfunctioning. The levers connecting to the clutch and throttle cables are a bit stiff despite plenty of lubrication. The business ends on the transmission and the engine seem to be working fine. The cables are probably the originals but they seem to move freely enough in their tubes. I think the problem is right behind the control panel, but I can't see how to fix it. Any suggestions would be welcome. Thanks in advance Richard Isherwood Windspirit, SJ 28 - 118 Port Townsend WA -- Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca GPS and NMEA info: http://vancouver-webpages.com/peter Vancouver Power Squadron: http://vancouver.powersquadron.ca |
#3
posted to rec.boats.cruising
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Clutch Control Problem
There is a compression spring loaded tube at end of your shift cable
that attaches to transmission shift arm. This spring will rust and stick if not lubricated every 100 hours. When cable is at full extension either foward or reverse the spring is depressid 1/8 of an inch to insure clutch positive engagement |
#4
posted to rec.boats.cruising
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Clutch Control Problem
On May 31, 6:54 pm, Peter Bennett wrote:
On Sat, 31 May 2008 12:07:53 -0700 (PDT), " wrote: My 1978 San Juan 28 has a Yanmar 15hp diesel and a Morse control - a single throttle lever for forward and aft, and a push in-pull out button for the clutch - you push it in to engage, out for neutral. I'm having trouble finding the neutral spot when I need to disengage the clutch. The throttle control is very notchy around the neutral area. I find myself fiddling with the controls when I'm 20 feet from the dock and wanting to drift in. I don't really understand your problem - on any marine diesel I've used with a single lever control, including a Yanmar 2GM, the clutch control was only used when starting and warming up the engine - it allowed you to advance the throttle without engaging forward or reverse gear. There was no need to touch the clutch control while manoeuvering - simply putting the control lever in the center detent would disengage the clutch, and set the engine speed to idle. If the engine normally remains in gear with the control lever in the center position, the shift cable is misadjusted, or the control lever mechanism that drives the shift cable is malfunctioning. The levers connecting to the clutch and throttle cables are a bit stiff despite plenty of lubrication. The business ends on the transmission and the engine seem to be working fine. The cables are probably the originals but they seem to move freely enough in their tubes. I think the problem is right behind the control panel, but I can't see how to fix it. Any suggestions would be welcome. Thanks in advance Richard Isherwood Windspirit, SJ 28 - 118 Port Townsend WA -- Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca GPS and NMEA info:http://vancouver-webpages.com/peter Vancouver Power Squadron:http://vancouver.powersquadron.ca Peter, Thanks. The problem is that even at idle speed, without pulling the clutch button out, the boat continues to be driven slowly either forward or back, which makes it difficult to dock it, particularly alone. The center spot is very difficult to feel, and the lever needs some forcing through that zone,which makes me think something is worn inside the control. Richard |
#5
posted to rec.boats.cruising
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Clutch Control Problem
On Sat, 31 May 2008 12:07:53 -0700 (PDT), "
wrote: My 1978 San Juan 28 has a Yanmar 15hp diesel and a Morse control - a single throttle lever for forward and aft, and a push in-pull out button for the clutch - you push it in to engage, out for neutral. I'm having trouble finding the neutral spot when I need to disengage the clutch. The throttle control is very notchy around the neutral area. I find myself fiddling with the controls when I'm 20 feet from the dock and wanting to drift in. The levers connecting to the clutch and throttle cables are a bit stiff despite plenty of lubrication. The business ends on the transmission and the engine seem to be working fine. The cables are probably the originals but they seem to move freely enough in their tubes. I think the problem is right behind the control panel, but I can't see how to fix it. Any suggestions would be welcome. Thanks in advance Richard Isherwood Windspirit, SJ 28 - 118 Port Townsend WA Sounds like the "clockwork" behind the throttle quadrant is worn or broke - that needed fixing on an Mercruiser control for an outdrive I had.... Brian W |
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