oldgit
Well-known member
Had a pair of AQD40A 135HP in Princess 33 on outdrives and now have a pair of TAMD 41B 200HPin a Princess 35.
Apart from a bit of blue smoke on idle after start up , never observed black smoke while opening throttles on either boat.
However chum had a Princess 330 which gave out an enormous gout of black smoke when throttles were opened.
He tried everything/ repitching props/new air filters/new fuel pump/ fuel filters etc etc.
It turned out to be the fuel regulator which sits on top of the injection pump.
Not sure if the previous owner had fiddled with it. !
Apart from a bit of blue smoke on idle after start up , never observed black smoke while opening throttles on either boat.
However chum had a Princess 330 which gave out an enormous gout of black smoke when throttles were opened.
He tried everything/ repitching props/new air filters/new fuel pump/ fuel filters etc etc.
It turned out to be the fuel regulator which sits on top of the injection pump.
Not sure if the previous owner had fiddled with it. !