Boat props x2 Help would be great!

[Dhadley]

Re: Boat props x2 Help would be great!

One more thing - looks like there is a transducer or something right in front of the starboard motor. If so, be very careful. In fact it needs to be at least 10" away from the centerline of the motor.

 

[tmartin]

Re: Boat props x2 Help would be great!

***********update************

Ok, here's the update. Two aluminum 15x17 3-blade props is what I have now.....The boat has excellent hole shot and top speed is 45'ish. The bummer is simply, the motors are too high to take advantage of an meaningful trim. Last Motor trimmed 6 bars (LED Honda Digital gauges on both motors) and now all I can do is 3 bars. If I don't start out an the bottom, I will cavitate on wot at a stand still. I only have one hole I can drop and so I will go ahead and do that. I really wish I had 4" (one hole = 1 inch) to drop instead. The motors are the longest versions that Honda has. So, without jack plate x2, I guess I have to live with it....

The only advantage I see is that having the motors soo tucked up under the transome, It really pulls the bow down and chews through slop pretty well. I still cavitate under nasty conditions and doing maybe 3800 rpms. I know it ain't right. I wish I never had the knowledge to know what it SHOULD be...

1. How much diff can moving ther motors down 1" do for slipage and trim ability?
2. What prop will give me more bow lift and STLL hold without slippage? High rake?

 

[hwsiii]

Re: Boat props x2 Help would be great!

T, I am sure dhadley will be here as soon as he sees your post, i would think by monday morning.



H

 

[Dhadley]

Re: Boat props x2 Help would be great!

T, don't assume all props of a given pitch are created equal - they just aren't. And don't assume all gearcases are created equal. Your Ficht gearcases may well act very differently than the Honda gearcases. You haven't (that I noticed) mentioned anything about toe-in. That plays a huge part in a multi engine set up.

From the pics it doesn't look like those props have much rake or tip cup. Just not sure I'd expect much from them. There are some very good ss props made specificaly for 4 strokes. If I were doing this I think I'd take a close look at them. To be honest, this isn't a set up I'd be looking at aluminum props.

 

[tmartin]

Re: Boat props x2 Help would be great!

T, don't assume all props of a given pitch are created equal - they just aren't. And don't assume all gearcases are created equal. Your Ficht gearcases may well act very differently than the Honda gearcases. You haven't (that I noticed) mentioned anything about toe-in. That plays a huge part in a multi engine set up.

From the pics it doesn't look like those props have much rake or tip cup. Just not sure I'd expect much from them. There are some very good ss props made specificaly for 4 strokes. If I were doing this I think I'd take a close look at them. To be honest, this isn't a set up I'd be looking at aluminum props.

Dhadley-

Thanks for taking the time to chime in. It is somewhat reassuring.

My goal is to find that ss prop that is a closer match to my setup....

I believe a new thread is in order....