getting on plane

[anchor man]

When starting out from idle speed, typically I give it just enough juice to get on plane and then set my cruising speed. Without gunning it out of the hole, which prop pitch will get me on plane quicker..19 or 21?

[Ralph Wiggum]

I'm sure that there are a lot more knowledgable people out there, but I am pretty sure that you'll pop out quicker with the 19, but you'll have more top speed with the 21.

[Deitz Dittrich]

Ralph if correct, the smaller pitch will spinn faster and get you up quicker. Be sure that your not going too small as you dont want to over rev your boat.

on a side note, a 4 blade prop will get you up faster than a 3 will, but again, you are scaraficing top end performance.

[marine_man]

I concur with Deitz and Ralph... the flatter the blade (or, the lower the pitch) the quicker you'll get on plane...

Not happy with the performance of your fisherman anchor man?

marine_man

[anchor man]

Marine Man,

I'm plenty happy with the Fisherman, just trying to decide between the original 21 or the 19 I'm trying out. The 19 gets me up to 6000rpm and even a bit over, the 21 more in the mid 5000 range at wot, plus a few more mph.

[Deitz Dittrich]

WOAH!!!! 6,000 rpms is too many.. most eng say to keep it under 5400 or even less than that.. go with the 21 if it gets you to the 5400 rpms. Maybe look at a 21 4 blade?

[SteveWilson]

I have a Fisherman (1800) too with a 21 pitch aluminum prop (Hustler) and was wondering what changes I might experience if I went with a Michigan Wheel Rapture (Stainless) of the same size (13-1/4"x21"). Since I have a kicker motor too I'm not so concerned with hitting rocks as I switch to the kicker or Minnkota when I'm playing in the shallows.

[Ralph Wiggum]

The stainless steel should give you more speed and better hole shot because the blade of a SS prop don't flex like aluminum blades do. Probably a few mph top end.

[anchor man]

Deitz,

I talked to a rep at Yamaha with the same concern about the higher rpm's. They said the max range for the F150 is 5000-6000 and that 57000-6000 is the optimum range I want to reach for best performance.

So, if they say try to get to 5700-6000, but I decide to go with the 21 and am in the 5400 range, will this mean my motor is working too hard since the prop restricts it by a few hunderd rpms??

[marine_man]

anchor man...

Maybe your best bet would be to go with a stainless.. it'd get you the best of both worlds... it'd get your speed back that you lost when you went to the 19... and it'd get the hole shot, or very close to it, of what you have now...

A little more $$$$ but... it might be worth it... presuming you don't run the river and have a high likely hood of hitting a submerged obstacle...

marine_man

[Deitz Dittrich]

anch. if that is what they told you I would go with what they say.. I never knew they wanted that many RPMs.. Go with the 19 then!

[Ole #1]

If you get on plane quick enough, stick with the 21. If you feel it takes to long to get on plane, maybe try the 19.

My Johnson 140 4 stroke runs max RPM at 6,200 or 6,300.

It idles at 750 and silent.

Ole

[ChuckN]

"When starting out from idle speed, typically I give it just enough juice to get on plane and then set my cruising speed Without gunning it out of the hole, which prop pitch will get me on plane quicker..19 or 21?"

Is there a problem with the boat planing? I don't understand why you don't want to give the motor full throttle to plane up and then back off on RPMs to your cruising speed.

When you start manipulating what the manufacturer and dealer recommends you may run into trouble. They set up boats from lots of experience.

Your other question... 5400 RPMs for a motor that is recommended for 5800-6000? I wouldn't do it, you are stressing that motor more as it is. Plus if you are dropping those RPM's your hole shot should not be very good, and that is what you want from what I see in the topic?