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sam196370
05-14-2013, 01:42 PM
So I put a new 13x13 OJ 4-blade on my '79 SNS (351w - 1:1 velvet drive) and the increased acceleration is amazing! I did notice that now the motor will rev up to 5,000 and maybe higher; didn't think it was a good idea to push it...

Is this normal and what would people think I should use as a "redline"?

Thanks!

EJ OJPROP
05-14-2013, 01:51 PM
4800 to 5000 RPM should be max. May need to send the prop down for a little more cup or exchange it for a 13 X 14.

thatsmrmastercraft
05-14-2013, 01:58 PM
4800 to 5000 RPM should be max. May need to send the prop down for a little more cup or exchange it for a 13 X 14.

That response took 9 minutes. :toast:

sam196370
05-14-2013, 04:52 PM
Good to know, thanks. Dealer recommended 13x13, will I get better top speed with increased pitch?

ricford
05-14-2013, 05:42 PM
Good to know, thanks. Dealer recommended 13x13, will I get better top speed with increased pitch?

Yes you will.