what gear ratio?

[skeeterboss]

I need to know my gear ratio for my 2001 Yam. HPDI 150 (VZ150TLRZ). I believe this is a 2.6 litre engine correct? I know my shaft is 20 inches (no pun). I believe my only gear ratio choices are 1.86 and 2.00....any ideas?

[21XDC]

2.0:1 http://www.kencook.net/Gears.html

[skeeterboss]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 21XDC &raquo;</TD></TR><TR><TD CLASS="quote">2.0:1 http://www.kencook.net/Gears.html</TD></TR></TABLE>

[TomM]

What is the ratio? rpm/prop revolution or prop revolution/rpm....

Tom

[21XDC]

2 revs of the motor to 1 rev of the prop.

[headhigh]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 21XDC &raquo;</TD></TR><TR><TD CLASS="quote">2 revs of the motor to 1 rev of the prop. </TD></TR></TABLE>

So at 6000 rpms your prop is turning 3000 rpms. So if you had a 23p prop your boat would be traveling at 65.34 mph with zero prop slip.....but that just doesn't happen.

[21XDC]

OK, so it must be 6000 rpms X2 is 12,000 revs on a 23P and slipping 95%

[headhigh]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 21XDC &raquo;</TD></TR><TR><TD CLASS="quote">OK, so it must be 6000 rpms X2 is 12,000 revs on a 23P and slipping 95%

</TD></TR></TABLE>

Uhhh, maybe we can get Mark to put a little cup in the tips of the prop.....that should bring it down to 75-80%