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Old 11 February 2015, 14:51   #1
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Country: UK - Scotland
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Mercusier 1.7 dti losing power

Hi I was wondering if anyone else has encountered this problem. I have a humber Ocean pro with a 1.7 dti engine. I had the boat laid up for a year and a half. I put her back in the water a couple of weeks ago and she was running fine probably did about 4-5 hrs with no problems then all of a sudden when I go over 3100 rpms the engine losses power for a second every few seconds bellow 3100 rpms she runs fine. There was some old diesel in the tank about 3/4 full and I have put in about 100lts fresh fuel. Has anyone else had similar problems. I am going to put new fuel filters on tomorrow to see if that makes a difference. Cheers
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Old 11 February 2015, 14:57   #2
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Quick google suggests turbo wastegate is a common failure point. Is it a car engine based unit marinised?
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Old 11 February 2015, 16:16   #3
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Country: UK - Scotland
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Yes it is based on an Izuzu car engine I think I am going to investigate the turbo gate value tomorrow as well
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Old 11 February 2015, 16:29   #4
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Hi fuel filter is favourite & a good first port of call
The wastegate issue was usually sticking either closed or open if it sticks open then you get no boost pressure so I don't think that's your problem & if it sticks closed you don't notice until you melt a piston due to running on overboost
its worth dropping the actuator off to check the wastegate is free its only 2 bolts & could save your engine
if the filters are good I'd start looking for possible air leaks into the fuel lines then I think id check boost pressure
intercooler is also prone to getting restricted
I'm just reassembling one to go back into my boat after a rebuild
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Old 11 February 2015, 16:29   #5
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We have an astra van with that engine it, it will not die! Parts should be fairly cheap and easy to come by though...
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Old 11 February 2015, 16:41   #6
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Country: UK - Scotland
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Quote:
Originally Posted by beamishken View Post
Hi fuel filter is favourite & a good first port of call
The wastegate issue was usually sticking either closed or open if it sticks open then you get no boost pressure so I don't think that's your problem & if it sticks closed you don't notice until you melt a piston due to running on overboost
its worth dropping the actuator off to check the wastegate is free its only 2 bolts & could save your engine
if the filters are good I'd start looking for possible air leaks into the fuel lines then I think id check boost pressure
intercooler is also prone to getting restricted
I'm just reassembling one to go back into my boat after a rebuild
Thank you for your reply I will check all that u have suggested
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