Prop results, Y2K
 

Got the chance to try a new prop this weekend. Motor is a 540, don't know HP but been estimated around 575. Got the boat with a 26 4 blade bravo1. Tried a 25 Hydromotive P-5 X5 Blade

I have not had a chance to compare WOT #s because I have an oil leak and not used to the boat yet, but here is what I got

bravo
3500 rpm 45 mph
5400 rpm 76-78

Hydro
3500 rpm 51 mph
5200 rpm 76 mph, had more left in it

I think I will be able to see 80 when I know how to run the boat better.

Re: Prop results, Y2K
 

Pure Energy Whats Your Top Rpm Before Rev Limiter Kicks In ????

Re: Prop results, Y2K
 

The rev limiter is set @ 6200. This is a carbed 540 custom built, but not for me. It's power is made between 4200 and 5400 rpm. Not sure "where" max rpm is. I still need a lot more seat time!

Re: Prop results, Y2K
 

6mph increase at cruise!!! Thats nice! :D

Re: Prop results, Y2K
 

Get that leak fixed so we can see some top end numbers :drink:

Re: Prop results, Y2K
 

Hey faster,thats GOOD power!!! tripps

Re: Prop results, Y2K
 

Thanks Tripps. Have you seen the engine on my thread?

Re: Prop results, Y2K
 

If your power starts going down at 5400 then you should prop for 5400. What gear is in the drive 1.5 or 1.36? When I had my bravo setup my gear was 1.36 also with a 540 and spinning 5400 with a 26. Never tried other props.

Re: Prop results, Y2K
 

I believe he's running a 1.5 lefty...

Zup, why do you guys run left hand props?
Jcap also runs a lefty...

Re: Prop results, Y2K
 

Rumor has it the lefts are faster than the rights because it equalizes the mota torque. I purchased a right but it turned out to be a left. The price was rite so I couldnt *****.Althouigh now I should because props are very hard to find.

Re: Prop results, Y2K
 

Pat After Running 48 Hours On Superbabi With The 27" Right Hand Prop, I Also Am Going To The Left, As Zz Said Left Is Faster And The Pull With 600 Pulls The Boat To The Left.

Re: Prop results, Y2K
 

Is there any danger in F'in up your drive by switching rotation? Particularly a drive with a lot of hours on it?

Re: Prop results, Y2K
 

Faster,no i haven't!! you got a link?? tripps

Re: Prop results, Y2K
 

Tripps, clean out your PM box. :evilb:

Re: Prop results, Y2K
 

Superbabi My 30 had both batteries on the drivers side with a right hand drive and sat in the water funny for that reason but the boat ran even on plane. When I went lefty the boat leaned to the drivers side so I move one battery over now having one on each side to correct the problem. Where are your batteries?

Dave When you put the drive in reverse the cone clutch pushes up into the top gear putting the pressure on the top cap. Being an older drive my thought is it will not make a difference because it has hardly been used anyway. On the older performance drives the bottom gears was thicker to take the pressure and you where pushing against the case not the cap. Thats Y they sell stud kits and billet top caps.

Re: Prop results, Y2K
 

Zz Superbabi Has One Port And One Starboard, All Spread Out Equal For Weight Load. The Boat Does Lean Left Underway Needing The Port K-plane To Level Her Out. I Believe The Tab Down Somewhat Does Rob A Couple Mph's Off The Top End. Jc's Boat Did The Same Thing , You Can See It In The Video That Freezeframe Made At The Races. Also The Current Onwer Has The Same Thing Going On. I Feel That The Change To Left Rotation Will Equal This Out. I Just Have To Get The Left Hand Prop And Try.............soon .

Re: Prop results, Y2K
 

I bet moving the port battery to the starboard and having both on that side will fix the lean for a right hand drive. It worked for me.And its a cheap fix and worth not having to use any tabs.For the left I have one on each side.

Re: Prop results, Y2K
 

ZZ I UNDERSTAND THE 1ST PART, MOVING BOTH BATTERYS TO THE STARBOARD. SORRY I'M NOT SURE WHAT YOU MEAN BY FOR THE LEFT YOU HAVE ONE ON EACH SIDE????

Re: Prop results, Y2K
 

I guess I would agree that a lefty prop could be faster being that the engine rotates the same and there would not be a direction change.

For Dave's question:
I have heard of people changing drive rotation from time to time to even out the weir. But that was on twin engine boats because there is a concern that the left hand drive will not last as long...

As for our boats leaning over:
These 7' beam boat are vary weight sensitive and I would venture to say each a little different...
My boat runs level with out any port tab if I'm alone. I have one battery and it is mounted on the starboard side. Remember the helm is also on the starboard side. My weight along with the additional weight starboard counteracts the roll from the right hand prop.
As soon as I add a passenger, I need some port tab to run level.

Re: Prop results, Y2K
 

Pat Have You Watched Your Rpm's Drop As You Add The Tab Downward. Sort Of Like A Brake ???

Re: Prop results, Y2K
 

Oh Yes Gary...
The boat is fastest with the flaps up and trimmed to fly. :drink:

I know this is an old thread. I am curious how many Y2K owners are running LH props?

Dave. They are set up with Lefty's now. Seems to take the lean out of the hull. Same with the Fountain 29. They run lefty too.

Thanks Rick,

I'm going to try a lefty when I get the chance. I am noticing a lean to the left. My 24 leaned left until I trimmed it out a bit. Maybe I just need some more seat time to find the sweet spots.

Another ? about the k-planes. Most newer Y2Ks have the tabs parallel to the water now. I've also seen them parallel with the hull. The tabs on my 24 were parallel with the hull and seemed to have a greater effect when lowered.

Slightly different application with outboards on mine, but I am parrallel to hull (we really didnt have room to fit them in parrallel to water) and they work really well. I rarely need to use them unless I am trying to keep the nose down at really low speeds or in a strong cross wind, but just a little tap and I am level

That's the way my 24 was. If lowered much below neutral, they would start to bow steer the boat.

Yea, definitly very sensitive, the parrallel to the water may be the same way, but I havent been in one set up like that, keeping my fingers crossed, I should be in the water sat for first ride of the season

I have a port lean... dragging a bit of port tab. I'm considering trying a lefty prop soon. Was also worried about a 300+hr drive switching direction...

Try moving both batteries to the other side it worked for me. Moving weight around is cheaper then props. Start with a sand bag and see what happens.

Good idea. I have a battery on each side now. I keep my "gear" box on the star side. Anchors, tools, etc., probably weighs 75 lbs or so. I try to seat passengers to help too.

I have to drag a little port tab most of the time to keep my boat level but on faster runs I run a little positive trim and as the trim goes up it compensates for the prop torque and I can raise the tab along with the drive. I drag no tab on top end runs. It seems that reversing prop rotation on a single vee would reverse this effect causing a dangerous and undesirable condition. That is, increased list to port with positive trim.

Sound dangerous using tabs like that. Its been so long since ive had the hatch open I dont remember were my batteries are any more they been moved so much. Left drive right drive just dont remember. I think now with the right hand drive both batteries on the drivers side the boat leans when parked but up and running its level. the 24,s and 30,s are very narrow, trimmed up and flying even narrower ! Ive always wanted to move the batteries all the way to the transom to make the nose liter. Some day .

I finally got around to trying a lefty. I got a LH 26P Maximus from BBlades test program.

I immediately noticed a difference. With the RH even when I arranged gear and passengers I still had to run some left tab. Now, no more tab needed. I don't think the tab was slowing me down, it was just annoying to me.

I am going to send the prop back to bblades and get it tweaked a bit. I was getting 4950 rpms with 2/3 fuel, 2 adults, 2 kids. Brett said that he could probably get me another 300 rpms out of it. That should put me right where I want to be. I should be real close to the rev limiter with a light load.

Here where my results......
rpm speed
3200 48
3500 51
3600 54
3800 57
4000 60
4200 61 ???
4400 63
4600 67
4800 70
4950 73

I'm hoping for 5300 / 78. I did run 80.1 last season with a bravo 1 prop but the mid range doesn't compare to the Maximus.

Dave M... did you just run your existing drive in reverse for this test?

Yup! I'll switch my shifter once I get the prop back from bblades.

Dave- good luck with the new props, I am planning on getting a set of bblades once I have the new engines broken in

How many hours are on your outdrive?

180 hrs. I'm going to run the prop when I get it back and then change my gear oil and look for any metal. From what I've been told, it's not big deal. I was nervous at first but once i got on plane and rode around for a while I forgot all about it.

Thanks Dave....