Best props or set up for tubing

[mb34928]

I have a 17' 6" single console bass boat that is awesome for fishing, but it is too fast for tubing. <br /><br />to go slow enough for my kids to get on the tube it will not come up on plane and the temp is on the high side at that plane.<br />Here's what I have:<br /><br />93 150 Merc XRI v6<br />Jackplate <br />Stablizing fin - Just installed - hugh improvement<br />Quick silver SST 25" pitch<br />top speed 60 @ 5100 rpms<br /><br />can I get a prop with a smaller pitch for tubing that will slow it down? Would alum work - its alot cheaper???<br /><br />Any Help appreciated<br />Murf

 

[corm]

Re: Best props or set up for tubing

Hi,<br />I have a 17 ft Hydro-Sport bass rig that I use for tubing sometimes. I run a 24" Chopper<br />normaly. For tubing I use a 18" Turbo which<br />gives me 4000 RPMs at ski & tubeing speed. I have also used a 17" 4 blade Comp-Prop for the same thing. An AL prop would also work.<br />Oh-ya the motor is a 150 L6 Merc.<br /><br />BTW, 5100 RPMs is to low for this motor, it should be atleast 5600. So I would get some buddies props and try them out or get your tach checked.<br /><br />...have fun...corm

 

[mb34928]

Re: Best props or set up for tubing

Corm,<br /><br />What year is your Merc 150? I Talked to Comprop tech support and they recommended I use a 22", their concern is I would be over reving the engine. The problem is the 22" only come in a 4 1/2 collar size. and of course I'm at work and can not check it. Do you know if the 93 150 XRI V6 has the 4 1/2 collar??<br /><br />Thanks<br />Murf

 

[corm]

Re: Best props or set up for tubing

Hi Murf,<br />I've got a inline 6 cyl 1976 yr, not a V6 like yours. My motor max RPM is 5800. It turns the 24"chopper 6100 RPMs which is over reved as it is. When I have to use it for tubeing & ect. I don't even try to run it wide open as it would run over 7000 RPMs. To <br />high for my likeing these days.

<br />You would have the same problem running a 17 <br />To high of engine RPM at WOT. However your childern probably don't want to go over 30MPH<br />so you need to prop the motor to turn 3500-<br />4000 RPM at that speed. For every inch you change the pitch you will change the engine RPM 150 - 200 RPMs depending on the type of prop. Proping for childern sking & tubing is a different mind set. WOT is out of the picture. You have to use the prop as a gear to allow the boat to go 30 MPH at 4000RPMs. this allows for throttle adjustment down to <br />3000RPMs and still have the motor run well<br />and have lots of power to help keep the boat on plane at a lower speed yet. This is NOT a prop that is used for anything but tubing.<br /><br />I don't know what brand boat you have (they all run somewhat different), but I would not put over a 20" pitch prop on it. You have the large gear case. The XR6 150Hp has the small case like mine on it. The Tech at Comp-Prop is correct in His thinking about over reving the motor, but he's not 5yrs old riding on the tube scared to death cause the boat won't go under 40MPH.<br /><br />I hope this make some sense, as it is past my bed time tonight.<br />

corm

 

[mb34928]

Re: Best props or set up for tubing

That was alot of help. I had to purchase the Comprop 22' pitch - I have the larger lower unit. Because of the size and amount of flex, it I should raise my RPM's about 700-800. I will probably be able to run it all the time. Either way it should be a huge improvement to what I have for tubing. <br /><br />I really appriecate your, Thanks<br />Murf

 

[sony2001]

Re: Best props or set up for tubing

Does Comprop have a website?<br /><br />------------------

 

[sony2001]

Re: Best props or set up for tubing

Found it!<br /><br />------------------