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Starliner w/ G2 250HO Performance Report

I hear ya...I wish I could have put some real hours on her this summer, but it just didn't happen. Love the boat. Love it.
 
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First off, surfacing props is what breaks them. Thinner (faster) they are, faster they break.

2nd, increased diameter allows us to raise the motor higher (faster) before the prop starts slipping.

3rd, Sam I have a wall of propellers, mostly 26's and live 15 mins from a ramp.

If they'll fit your new motor, we'll load all of em in my truck and head to the ramp this spring.

Haven't had time to see the finished product and I'm out of town on a dying phone.
Come on down this spring and we'll go to work.
Prop testing is fun when you can stay I the boat and have a pit monkey backing trailer and changing props.
 
I appreciate the offer. Right now I got a bunch of props to test out too.

21P Mirage
23P Tempest+
22P RX4
24P Bravo 1 FS
26P RX4
26.5P Bravo 1 FS.

So far my best has been the 26P RX4 ( I think...I need to review my posts and see for sure) but I expect the best result will be this spring or fall with the 26.5P Bravo.
 
Sam I am said:
I appreciate the offer. Right now I got a bunch of props to test out too.

21P Mirage
23P Tempest+
22P RX4
24P Bravo 1 FS
26P RX4
26.5P Bravo 1 FS.

So far my best has been the 26P RX4 ( I think...I need to review my posts and see for sure) but I expect the best result will be this spring or fall with the 26.5P Bravo.
Click to expand...

I know a lot of guys have had great luck w/the Bravo's on heavier Vee's.
I think their increased diameter is part of it.

I tried a set on my Sonic but never got them to run the way I thought they should have. It had a hop that would not go away.
Only props to make that boat do that.
I cut 3/8" off the back of the hubs to reduce the lip and that cured 95% of it.

Boat looks great in the video. Attitude is right, trim angle is good, rooster tail is long and low like we want it.

You'll get there.
 
ForbesZ said:
To make outboard boats run quicker we run the motors high on the transom jack so that the top third of each blade of the propeller is piercing the surface of the water all the time. This puts a lot of stress on the blades as they exit the water briefly (no load) and then submerge again (full load) 50 to 60 times per second at WOT.
Click to expand...

:rof:;)

Okay back to the Starliner, looking forward to seeing this thing go!
 
blacktruck said:
:rof:;)

Okay back to the Starliner, looking forward to seeing this thing go!
Click to expand...

On my Starliner I am running the prop shaft even w/the bottom.
So w/a 3 blade wheel, one blade is totally uncovered and two are partially uncovered, every revolution.
The loading/unloading of the blades is dramatic.
I have cracked several including a Mazco RE series which are known to.
 
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Instigator said:
On my Starliner I am running the prop shaft even w/the bottom.
So w/a 3 blade wheel, one blade is totally uncovered and two are partially uncovered, every revolution.
The loading/unloading of the blades is dramatic.
I have cracked several including a Mazco RE series which are known to.
Click to expand...

Well there are lots of reasons for that (thin blades + heavy boat + running too high = bad setup). The props were obviously not good for your setup. Were they stock, tampered with?

You can run a Starliner with a stock 250 indefinitely with the right prop, without the fear of it breaking. Running ultra thin racing props on semi-heavy boats that don't fly, is hard on the prop and you won't get the most out of the prop, not to mention dangerous. I don't think we are disagreeing on much, maybe just semantics.

I agree with you that the Bravo would be interesting to see. Looking forward to the results.

Would love to know what the boat weighs too.
 
blacktruck said:
Well there are lots of reasons for that (thin blades + heavy boat + running too high = bad setup). The props were obviously not good for your setup. Were they stock, tampered with?

You can run a Starliner with a stock 250 indefinitely with the right prop, without the fear of it breaking. Running ultra thin racing props on semi-heavy boats that don't fly, is hard on the prop and you won't get the most out of the prop, not to mention dangerous. I don't think we are disagreeing on much, maybe just semantics.

I agree with you that the Bravo would be interesting to see. Looking forward to the results.

Would love to know what the boat weighs too.
Click to expand...

Call any of the hi perfect prop mfg's and ask them if their props live as long when surfaced. They will laugh at you.

Last two I cracked were on a 750 lb tunnel boat.
Half the weight of a typical Checkmate.
Yes weight and HPs are part of the equation but is far outweighed by surfacing the lower unit.
I run OMCs and if you surface them, their cases become time bombs.
Only way to make them live is to through bolt the prop shaft carrier.
Top line race teams have their props checked for cracks between races.

The Merc Sportmaster is the best unit available (accordingly, I adapt them to my OMCs), they still break and most guys change oil at 20 hrs.
Go to YouTube and search the videos of a surfaced case at speed. It is scary.

That being said, let's not muck up (any more) Sams thread by debating the effects of surfacing a case/prop.
 
blacktruck, rather than correcting us on someone else's thread, you need to start your own thread on "surfacing prpellers and how they break" that way you can enlighten us all once. Instead of having keep doing it over and ruining other guys threads.

I also think the guys over on "screamandfly.com" would appreciate a little help and would benefit from your researched understanding of propellers.
 
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Instigator said:
Call any of the hi perfect prop mfg's and ask them if their props live as long when surfaced. They will laugh at you.

Last two I cracked were on a 750 lb tunnel boat.
Half the weight of a typical Checkmate.
Yes weight and HPs are part of the equation but is far outweighed by surfacing the lower unit.
I run OMCs and if you surface them, their cases become time bombs.
Only way to make them live is to through bolt the prop shaft carrier.
Top line race teams have their props checked for cracks between races.

The Merc Sportmaster is the best unit available (accordingly, I adapt them to my OMCs), they still break and most guys change oil at 20 hrs.
Go to YouTube and search the videos of a surfaced case at speed. It is scary.

That being said, let's not muck up (any more) Sams thread by debating the effects of surfacing a case/prop.
Click to expand...

Thanks for telling me stuff I already know. We are not talking about a race boat here. And props utilized properly on the right set up will last a long time. Race props running in race conditions is not the same; thin blades, high rpm on the surface, obviously.

Can't we just talk about the Starliner.

Let's see your setup just for fun. And let's see a pic of the 750 lb tunnel you race.
 
karzrus said:
blacktruck, rather than correcting us on someone else's thread, you need to start your own thread on "surfacing prpellers and how they break" that way you can enlighten us all once. Instead of having keep doing it over and ruining other guys threads.

I also think the guys over on "screamandfly.com" would appreciate a little help and would benefit from your researched understanding of propellers.
Click to expand...

Thanks, I actually think the others kept going over it. I just said, let's get back to the Starliner. Instigator keeps going back to it. Maybe he can start a thread. I just want to see how the Starliner ends up, was really curious about the G2 250 HO.
 
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