"just bought a new boat, well
"just bought a new boat, well I say new its a 70 year old scottish fifie, ex herring drifter, she's fitted with a 2715E and a borg warner box, which believe is 1.5:1 reduction.
now, just brought her back down from scotland to the tyne, and think the prop might be totally wrong, or that perhaps there's a governor fitted somewhere to the motor.
max revs about 1650, but that started to sound painful and made little difference to top speed when the revs were at 1500, so thats where we kept her for the run home, 27 hours non-stop, and she never missed a beat, but I would have thought she would rev a bit more, 2250 to 2500 perhaps, which might give her a bit more on the top end. at 1500 revs, with the tide behind us we'd make about 7knots, with the tide against us that would drop to 6 or less. She's 43' LOA, so wonder wether we've got too big a prop holding her back or wether there may be a governor on the engine
she did previously have an old Kelvin K3, which is a very slow revving engine, so maybe the prop from that is still fitted??
any suggestions as to what prop pitch/size should be?? or if there's a governor on the motor, how and where and should I maybe remove it??
mucho thanks, I know, loads of questions for a first post!"
"just bought a new boat, well I say new its a 70 year old scottish fifie, ex herring drifter, she's fitted with a 2715E and a borg warner box, which believe is 1.5:1 reduction.
now, just brought her back down from scotland to the tyne, and think the prop might be totally wrong, or that perhaps there's a governor fitted somewhere to the motor.
max revs about 1650, but that started to sound painful and made little difference to top speed when the revs were at 1500, so thats where we kept her for the run home, 27 hours non-stop, and she never missed a beat, but I would have thought she would rev a bit more, 2250 to 2500 perhaps, which might give her a bit more on the top end. at 1500 revs, with the tide behind us we'd make about 7knots, with the tide against us that would drop to 6 or less. She's 43' LOA, so wonder wether we've got too big a prop holding her back or wether there may be a governor on the engine
she did previously have an old Kelvin K3, which is a very slow revving engine, so maybe the prop from that is still fitted??
any suggestions as to what prop pitch/size should be?? or if there's a governor on the motor, how and where and should I maybe remove it??
mucho thanks, I know, loads of questions for a first post!"