Prop ? for merc xr2 150

[trapman69]

New to site and let me first say very informative<br /> and friendly site.<br /> Now to ? Just bought a used 86stratos fish/ski w/a mercury xr2 150 on it<br /> The boat is set up for sking and I want to set<br /> it up for more speed but still get out of the hole fast. Here's info on prop is a 23pitch<br /> stainless three blade, at full throttle 50mph at<br /> 5900rpm. I should also mention it has a hydrafoil.Thinking of going to a 19pitch 4blade!<br /> Any suggestion's are what has worked for you is<br /> much appreciated. Thanks Tom Reichert

 

[walleyehed]

Re: Prop ? for merc xr2 150

LaserII works real well on that set-up.<br />4-blade in a 19 would dissapoint you badly, if your 23 is truely doing what you say, but I must mention 50MPH at 5900 with a 23 on that is 25-27% slip ratio-sucks at best, and leads me to believe something else is astray.<br />Is your engine on a jackplate???<br />a 23 pitch on a bass boat with a 150 carbed is not a good combo for hole-shot (skiing) so double-check those numbers.

 

[trapman69]

Re: Prop ? for merc xr2 150

walleyehed<br /> Thanks for reply.Prop is marked 23 I don't <br /> know if its ever been repitched. No jackplate.<br /> The guy I bought it from told me they had it set <br /> up for skiing and tubing? I wouldn't say it has<br /> a great hole shot but not bad. How fast should <br /> this boat run on average any idea? Two average<br /> people. One more question what would be a good<br /> combo for hole shot and skiing because I do plan<br /> on doing this with my kids next summer. I've never really done any of that my kids have with<br /> other people so I really don't know what it takes<br /> to get someone out of the water. I was told this<br /> boat should do around 60 so thats why I was thinking it was the prop. My old boat had a 19pitch and ran like the wind. Again any help appreciated as I'm not very knowledgable about boat motors prop's etc. Thanks Tom R

 

[Bob La Londe]

Re: Prop ? for merc xr2 150

5900 rpm is a little fast, but not horribley so. Usually when you improve top speed you lose hole shot. I am thinking that at 5900 RPM you should be pushing 60 MPH with that prop. I suggest you go get or borrow a GPS unit to check your speed. <br /><br />Have you got your trim position all figured out <br />yet? <br /><br />I'm thinking that dropping down to a 19 will give you a better hole shot, but leave you over revving the engine at WOT. <br /><br />If you know somebody who has one I might suggest you try a 4 blade 24" trophy prop on it and see what it does for top speed.

 

[trapman69]

Re: Prop ? for merc xr2 150

Almost forgot what's a laserII?? Thanks Tom R

 

[trapman69]

Re: Prop ? for merc xr2 150

I have trim all figured out. Drove and owned a <br /> few boats but never had to do anything to them <br /> and if I did I take to the shop. With the kids<br /> wanting to ski tube and all that I want to make<br /> sure I'm set up right for them but also have a<br /> set up for when its fishing time (speed). <br /> Ie two props. Gps is a good idea I will do that.<br /> So I have this straight <br /> Lower the pitch the better the hole shot but also<br /> more rpm's.<br /> Doesn't the 4blades give you better hole shot for<br /> skiing etc? Thanks Tom R

 

[walleyehed]

Re: Prop ? for merc xr2 150

Yes, lower pitch=better hole-shot, and yes, the 4-blade will give better hole-shot as well.<br />Problem is..without a jackplate, you won't be able to obtain the speeds the 23 is capable of, and #2, it's likely it's mounted (the engine) too low to optimize the props abilities.<br />The LAZER II is a good all-around SS prop by Merc Marine. It has vent holes to help with hole-shot, but 23 may be too much. That set-up (no jackplate) likes a 19 for ski, tube, etc., and a 21 for speed. WITH a jackplate, I can see a 23 being very possible, but you don't know if that prop has been "worked". Optimise the engine mounting, then tweak with props.