Diesel misfire

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7 Jan 2007
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Hi,

I have a single cylinder Sabb 10hp diesel in my boat and i have noticed a slight intermittant misfire,i want to nip this in the bud so have tried changing the fuel filters but it is still there,

Also at mid revs under load i have noticed the tone of the engine change for a few seconds then back to normal,this doesnt seem to affect the boat speed.

Thanks in advance for any help forthcoming.
 

sarabande

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6 May 2005
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is there any chance you have some petrol in the fuel ?

(I did this in the car, and the engine produced a misfire as you describe)

It's either that, or you have an air leak upstream of the injector pump.
 
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Thanks for the replys,
Sarabande, I dont thinks its petrol in the diesel,i have a trusted supplier,
but i was thinking along the lines of air getting in the lines somewhere.The old CAV filter i took off had a lot of gunge along the top of the element.
 
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