Bertram31.com General Bulletin Board

Re: tachometer accuracy

Posted By: Capt. Dave Kosh
Date: Friday, 29 April 2005, at 11:26 a.m.

In Response To: tachometer accuracy (Dave Mechem)

Well they are telling you this because that is the way they test them. They read on the shaft or flywheel with an optical device. On the shaft you just take your reading and multiply by your transmission gear ratio. i.e. you measure 1400 RPM under full load WOT and multiply by 2 if you have 2 to 1 gears. So there method is optical. I don't see any reason why you coildn't rent one and do it yourself but I would do it under load WOT to see how accurate your tachs are at the upper end of the scale. I know mine were measured as follows. Port 150 RPM high Starboard 50 RPM low. So Nice to know these things.Good Luck Dave K

Messages In This Thread

tachometer accuracy
Dave Mechem -- Friday, 29 April 2005, at 8:22 a.m.

Re: tachometer accuracy
Capt. Dave Kosh -- Friday, 29 April 2005, at 11:26 a.m.

Re: tachometer accuracy
Mac Creech -- Friday, 29 April 2005, at 1:17 p.m.

Re: tachometer accuracy
Peter -- Saturday, 30 April 2005, at 3:43 p.m.

Re: tachometer accuracy *LINK* *PIC*
Capt Patrick McCrary -- Saturday, 30 April 2005, at 5:16 p.m.

Re: tachometer accuracy
andre fourrier-Louisiana -- Saturday, 30 April 2005, at 7:58 p.m.

Re: tachometer accuracy
Walter Kaprielian -- Saturday, 30 April 2005, at 8:01 p.m.

Re: tachometer accuracy
bruce -- Saturday, 30 April 2005, at 8:28 p.m.