volvopaul
Well-known member
You have a problem with the propeller size , quite a big one by the rpm stated .Hi All
I am still struggling with the problem of loss of revs on the port engine.
We have now changed the primary and engine filters and on a sea trial on Tuesday still only managed to achieve 2,500 rpm with the throttle wide open on the port engine. We checked the exhaust at this speed and there was no indication of any excess smoke of any colour, although we do get the normal black exhaust residue on the fibreglass near the exhaust outlets on both engines. The throttle cable has been checked on the berth and the injection lever travels to the stop when the throttle is pushed to maximum. As mentioned before, with the throttles in neutral, both engines achieve 3,400 rpm which suggests to me the problem is not fuel starvation. The port injectors and pump were serviced by Powerdrive in Portsmouth and I spoke to our local engineer who removed and refitted the injectors and pump and he confirmed no sea trial was conducted after installation. Could the problem now relate to the turbo charger? I am no engineer and would really appreciate any advice / suggestions as to the next step.
you are 100 rpm too high under load , now imagine the other engine being ok , the revs under load would be even higher as the good engine e is doing the work which is heavily loaded .
Did your engineer hire the correct tools to re time the injection pumps , it’s quite a process on the 63 as specialist tools are quoted to set the flywheel in the correct position then set up the drive flange on the pump . It could be that the timing is way out causing the los of performance , in my option there is quite an imbalance .
When one engine is way down on rpm the other good one would not achieve its full rpm let alone exceed it by 100 in such a heavy boat .
you have other engine problems of which have not been identified at the start .