| Author |
Message |
    
William Griffin
New member
Username: griff53
Post Number: 1
Registered: 10-2009
| | Posted on Wednesday, October 14, 2009 - 12:09 am: | 
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I have a 2000 tamd-41 engine in my boat 30' center console. Motor runs great stats right up when cold. I cruse at 3700 rpm. never any power loss at speed. My problem is after running at speed when i slow down to idle. Motor will shut of or have no power no throttle responce. If i idle for a while it will speed up and then throttle comes back. seems like air in the fuel. When motor stalls it will not start again untill motor cools about an hour. then starts right up and runs fine untill i run at speed again for a while then same thing again. Changed fuel pump and racor fuel seperator unit. no help. any advice. Thank you Bill |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4275
Registered: 04-2006
| | Posted on Wednesday, October 14, 2009 - 12:21 am: |
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Double check the fuel return.
Take the hose in a canister and check that it flows freely and without air bubbles. At the same time check the temperature of returned fuel. If 'hot' it may vaporize. Normal reason for return fuel to get hot is capacity. This might be fuel pump( primary), blocked filter, blocked pick-up tube in tank or air leaks in system. |
Stringer Bell
Member
Username: stringer_bell
Post Number: 54
Registered: 12-2006
| | Posted on Wednesday, October 14, 2009 - 09:58 am: |
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Fuel tank vent may be plugged, creating vacuum. |
alan martin
Member
Username: amarcafina
Post Number: 11
Registered: 02-2010
| | Posted on Friday, February 12, 2010 - 03:18 pm: |
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vent on tank clogged makes good since I 2nd that!! |
Martin Hellstrom
Member
Username: martinhellstrom
Post Number: 19
Registered: 06-2009
| | Posted on Wednesday, March 03, 2010 - 05:17 pm: |
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William,
Your TAMD41 has a max rpm between 3700 - 3900, volvo recomends crusing 300-500rpm below max rpm, my suggestion is that you lower your crusing rpm, this might not solve your problem, but will help your engine to last longer. |
Sailor
Member
Username: skiss
Post Number: 61
Registered: 08-2006
| | Posted on Thursday, March 04, 2010 - 08:38 am: |
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Depending on the tank setup...the pickup tube may have a screen on the bottom that is clogged.
Simple item to check. If restricted this may lean out the engine at full / cruise rpm causing heat due to lack of fuel lubrication, so I would start with simple / easiest items and go from there. If it has a screen, I would remove it and let the filters do their job. The 41 can clear minor fuel line bubbles, and the cooler tank fuel should help cool overheated fuel in the pump, so another suggestion is to stage the throtle to allow the running engine to cool. |
