Re: [Amel Yacht Owners] Rough engine at idle
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You mentioned cutlass bearing. What model Amel do you have?
Kimberlite Amel Super Maramu #376
From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Wednesday, January 02, 2019 7:56 PM
Subject: Re: [Amel Yacht Owners] Rough engine at idle
I’ll check the engine mounts. Looking at the prop shaft when in gear today there does seem to be a slight misalignment by eye.
I had the cutlass bearing replaced in the canaries so perhaps alignment has been out but somehow got worse via the engine mounts movement etc after prolonged free running of the prop shaft at speed on the long passage.
There was also LOTS of weed on the passage. A boat we are travelling with seems to have issues with their prop after weed fouling on the trip so perhaps we also were fouled whilst running the prop shaft alternator hard which has exacerbated a prop shaft alignment issue.
I’ve bled the system but only up to the injector pump. I am rather ignorant about how air might cause rough running. Perhaps if the air was just in one of the high pressure fuel lines to a single cylinder ? Wonder if this would get worse not better on higher revs.
I’ll also chase the fuel line as you mention to see if there is any obvious signs of problems at unions etc.
The last fuel we took on was in the canaries. Only about 50L. We don’t use much really but that which we did take on in a few places in the canaries always seemed ok and always had lots of throughput at the pumps with all the other boats. I treat with a biocide too but I could have a look at the fuel just in case.
I also have a switchable double canister off engine primary fuel filter. I tried switching that to the new unused filter and the problem remained unchanged.
Many thanks again for the helpful thoughts. Very much appreciated
All the best