by Les Simonds
(Sydney Australia)
I had my boat at marine mechanics, they just replaced sea water pump, replaced distributor cap and rota tor button all leads and spark plugs, replaced map sensor to 5.7 ltr mercruiser TBI engine and now the engine will only rev to 2000 rpm and is seems to be missing and vibrating when try to increase revs , they also replace gearbox and drive shaft, universal joints and bellows