prop advice 1972 glastron gt 160 with merc 1350

[coupe]

I just bought a super nice gt 160, and the merc 1350 is in great condition as well. Just mounted a 4 inch set back manuel jack plate on it. I have no idea where to start on a prop for this. Just want some thing with decent holeshot and good top speed. Its just a lake cruiser, but want it to perform well. any advise is welcomed. thanks.

[cyhuff]

If that 1350 is all original it has a 1.78 to 1 gear ratio. I'd probably start with something in the 17" pitch range. Make sure it's reaching the upper 5000's for rpms.

[David]

18 small ear chopper? Do lasers come as small as 18?

[flatbackcanoe]

22 pitch chopper, or a 22 pitch Lightning ET. You need an RPM gauge, it might be able to turn a bigger one.
Try 2 inches under for the lower. If the boat bounces raise the engine a little bit at a time, make sure water pressure doesn't drop off.

Inlines like 5800 - 6000 RPM Wide Open Throttle. No more then 6000 RPM and there is no REV limiter or over heat bell.

[cyhuff]

I don't think it will pull a 22" if it has the 1.78 lower.

[coupe]

The lower has been swapped, for what I ASSUME is a later gear box. It has a 19 pitch stainless on it now. GPS 52 mph with me wife and my boy riding. Hole shot is good. Cant say it runs bad with this, but would it pull a little larger pitch, with a different style blade, or if it let some exhaust over the hub?

Shamless plug....what a nice boat! shame they don't make em anymore.

[cyhuff]

As has been said, you absolutely need to get a tachometer and see what it's turning at WOT. Figure out what gear ratio you have also.

And I agree, those are cool boats!

[coupe]

another question? are there any other motors that have props that interchange with the merc in line 6? might find a couple used ones to try out. thanks again.