jimmy_the_builder
Well-Known Member
Hi Jimmy , it's not particularly a speed issue though it's down a couple or knots.
The issue is I could not read the correct rpm attained because the rev counters don't work correctly, for example a no load max speed should read 3900/4000 rpm , it read 2000 on the port engine , I carried out a couple of readings with my hand held tacho which wasn't easy bouncing around to get a reading as I could not get into the engine bay as it was too dangerous , this model is a baby targa 40 with a sun pad that lifts to gain engine access . The alternators feed the rev counters with a pulse , as their both after market models there clearly not correctly matched so there is either an issue with the code settings on the rev counters or the alternators are not giving the correct info.
Evening Paul
Gotcha, so you can't tell if the props are right because you can't tell that the engines are making WOT because you can't get an accurate rpm reading because of the alternators. All understood. Tricky problem to solve, in context. The obvious question is - why hasn't the boat got OE alternators? Cost saving? What other maintenance items are wrong for the same reason?