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B31 Shaft Length - Standard?
Posted: Oct 24th, '06, 21:04
by nic
Guys
Are all the B31 shafts the same length - 72 inches?
Thanks
Nic
Posted: Oct 24th, '06, 22:19
by AndreF
No
Posted: Oct 24th, '06, 22:25
by scot
I'm not a Bertram historian as some on the boards are, but as a general rule shaft length depends on the transmission / engine package.
The Borg Warner Velvet drives (71, 72 series) are approximately 9"-12" longer than one of the TwinDisc or ZF down angle gears, or even one of the newer series Borg Warners. Depending on engine location each variation could require a different length shaft. This would apply to re-powered boats mainly. But considering all the various engines that were offered in the 31 I would not think that they "were" all the same.
Scot
Posted: Oct 25th, '06, 07:18
by Garry
Nic,
It is safer to say they are all different. Different model 31s, engines, trannys, installations, hell, even the rudders are set different from boat to boat all leading you to measure, measure, measure...
Garry
Posted: Oct 25th, '06, 07:57
by Dave Kosh R.I.P.
Yep all different depending on engine and transmission etc. Mine are 90 1/2" long. Dave K
Posted: Oct 25th, '06, 09:36
by Carl
When I bough tmine one side was 92" the other 93". Now with reduction box's I am 88"