Boatman61, many thanks for reply. Appreciated.
My original post from Tuesday May 15th was as follows:
Volvo MD 22L will not accelerate anymore
I do have 2 Volvo Penta
MD 22L engines in my sailboat. They both do have same problem:
The engines do start without any problem. I can run them for hours without any problem but if I would bring back the throttle to neutral and than do try to accelerate again (backwards or forwards) the transmission
(PRM Delta) is engaging (the shaft is turning slowly) but the motor
is not reacting but remains running stationair(quite regular though) as if the throttle would still be in neutral position.
This problem starts to occur only after 2 hours of running; if I let the engine
rest a while/cool down (having it neutral is already sufficient) the engine
would engage again as normal (but after a limited period of time the same problem will occur). Strangely enough, if the problem occurs and I dis-engage the transmission
will accelerate without any delay.
The engines are 2 stand-alone machines that have their own filters, tubing etc) except for the diesel
tank (approx. 700 liter). Filters have been renewed; tubing have been blown through.
Any ideas on what could cause this problem are very welcome
Do you have any advise?