30p prop too much?

[steady streamin]

Finally got the boat back on the water, got all the bugs worked out, so now its time to let it eat.

have a '86 225 2.4l trying to turn a 30 et cut chopper. Topping out at about 74-75 with rpm's around 5500-5700. I try to trim it up, but the chine walk gets pretty bad, and i drive through it, but the rpm's wont climb. Running prop with even with the pad.

Does anybody think the prop pitch is actually too much? Or any suggestions,

[150aintenuff]

honestly if you go by factory rpm limits you arent to far off in terms of RPM... but in terms of reality something is wrong..... your speed and rpm are off by about 15 mph and your rpm is about 1000 low... something is amis

[steady streamin]

I just got a 26 trophy, gonna try it tomorrow to see what rpm's i pull with that. Do you think the prop isnt a true 30, its got it engraved on the prop, but looks like it was done by just a hand engraver, from steve's prop shop.

[olmo40]

Is it a Hill copy ?

[steady streamin]

not sure, how do you tell. It came with the boat

[olmo40]

Soiuld be stamped on it somewhere??Maybe >
The 26 Trophy should be low 80mph at around 6000rpm.My buddy ran a 28 ET Hill copy to 75 mph at 6000rpm awhile ago, on a similar rig to yours.His29 Tempest runs 85pmh at just over 6000rpm,for a comparison.

[steady streamin]

Well i took the 26 trophy out today, and hit almost 7000 rpms, but the gps never said more than 73. That trophy really wants to rip your neck off that is for sure, though it doesn't take off real fast, but once it gets up it on. So something just doesn't add up at all. The 30p should definitely be alot more speed. puzzled?

[olmo40]

I agree with 150aintenough ,something is out ?? Tach ? Is your boat very heavy ?How does your rooster tail look long and low ?

[brockshydro]

i have a vking yt with a 150 with a 30 pitch mazco boat is running 84 at 5700rpms also had a 28 pitch prop that came with boat it turned 6400 rpms but only ran 71 have a four blade not sure of pitch but definetly not for top end but ran 74 at 6500 to 6700rpms my boat is 17 ft has four inch setback and running 1/2 inch to 1 inch above pad.

[hydrostream79]

subscribed

[transomstand]

How deep you running the prop?

[steady streamin]

running even, with a 5-1/2" setback...

[transomstand]

It should easily turn a 30. Can you borrow another chopper or cleaver?

[steady streamin]

yeah hydrostream79 has a 26 chopper gonna try it... hope to see something different. maybe the tach is shot, just changed the rectifier to get the tach working again, so maybe it got shorted out. Because can a 2.4l with 122 lbs compression on each cylinder see 7k. With that trophy, at cruise the tach was showing 5500, almost like its a grand off.

[Jimbo]

Your tack could be off --- but with a 2.4 and a 30 chopper you should be able to run over 80 MPH. I had a Vector with a 140 Evinrude years ago that would run 73 - 75 MPH. The motor had some mods ( big carbs , tight heads, running a 26 chopper ). Check the transom and bottom --- make sure ( if possible ) that it is not flexing under power. Then check setup , solid motor mounts, duel cable steering, try a 28 chopper, raise and lower motor to find best height for your weight.

Jim

[bassracr]

that trophy is 13 3/4 in diam. and with the extra blade surface it will turn like a 28 or 30 pitch. if your 30 pitch chopper is 14 1/2, you may want to raise your motor maybe 1/8 in and retest.

[bassracr]

that trophy is 13 3/4 in diam. and with the extra blade surface it will turn like a 28 or 30 pitch. if your 30 pitch chopper is 14 1/2, you may want to raise your motor maybe 1/8 in and retest.
p.s. the trophys are a little doggy right out of the hole !

[steady streamin]

I am going to redrill the jack plate tomorrow to raise it up two inches, and that way i can have some play. Because it is maxed out, and its only even.

Will the trophy pull out if I have another person with me?

[steady streamin]

Well I started getting everything going in a positive direction. Got a new tach, redrilled the jack plate, so now the motor is a 1" above the pad and took it out. Ran 77 with the 26 trophy at about 5800 rpm's, with more to go. So I think I got the tach problem fixed, and got the motor up. So gonna put the chopper back on, and hope to break into the eighties.

The steering got real stiff, like I was drivin a ford falcon or something. Is that going to be normal? is that why everybody goes to hydraulic steering?

[bassracr]

Well I started getting everything going in a positive direction. Got a new tach, redrilled the jack plate, so now the motor is a 1" above the pad and took it out. Ran 77 with the 26 trophy at about 5800 rpm's, with more to go. So I think I got the tach problem fixed, and got the motor up. So gonna put the chopper back on, and hope to break into the eighties.

The steering got real stiff, like I was drivin a ford falcon or something. Is that going to be normal? is that why everybody goes to hydraulic steering?
do you have a nose cone..low water pickup on your gear case? is the skeg swept back and do you have a torque tamer on your skeg. properly set up it will not steer real stiff

[WATERWINGS]

subscribed also

[wideglide55]

Find a Mazco RE-3 or RE-4,If its an RE-4 you will want about one pitch number less.My Eliminator ran 85mph on the limiter 6400rpm with a Merc 28 Chopper,put on a Mazco RE-3 29 and ran 96mph@6100 rpm,that is 11mph with no change to the set-up.Lots of choppers that are just average everyday props have alot of slip.Get a nice used Mazco off of here and send it back to them to tune it in for your ride,I got lucky,the one I got from S&F worked perfect for me with no tuning,I paid $350,a new one is almost $800

[steady streamin]

I do have a lwp, and think the skeg is swept back, but not sure what that means exactly..

[bassracr]

I do have a lwp, and think the skeg is swept back, but not sure what that means exactly..
like an upside down shark fin ..if it has a little flare on the back vertical edge of the skeg,it has a torque tamer installed..this helps keep the gearcase from crabbin thru the water and makes your steering easier at speed ..at high engine heights. if your steering is easy to turn left to right at rest..im guessing it gets stiff because you are overtimmed (out too much) to keep your bow up. bump it back down and see if your steering frees up. if so you might try to lower your motor down slightly to get your prop hooking up better and you should be at a more nuetral (level) triim setting and getting good bow lift at speed ..if that is the issue. you want the motor pushing the boat forward not trimmed way up to hold the bow up..your wasting power and speed. you may need more setback to better balance the boat and lift the bow without excessive trim if that doesnt help..keep workin at it

[steady streamin]

i dont have a skeg at all, or the upside down shark fin. Just flat, that is the thing you can adjust so you dont have to hold the wheel one way or another. Do i need one?

[bassracr]

i dont have a skeg at all, or the upside down shark fin. Just flat, that is the thing you can adjust so you dont have to hold the wheel one way or another. Do i need one?
no. the fin on the bottom of the gearcase closest to the ground

[steady streamin]

look at this... maybe this will help...

<a href="http://s111.photobucket.com/albums/n149/trophy_hunter/?action=view&current=DSC03261.jpg" target="_blank"><img src="http://i111.photobucket.com/albums/n149/trophy_hunter/DSC03261.jpg" border="0" alt="Photobucket"></a>

[hydrostream79]

It is wild to me how SO many people have had SO much seccess with SO many different types of props with the Vector/V6 setup. Seems like you could buy and try props from now to the end of time, or till your pocket book runs out:eek: , looking for the perfect wheel for your particular rig.

I pretty much have the same setup as steady streamin, and it will be interesting to see what wheel brings the big numbers.

[transomstand]

look at this... maybe this will help...

http://i111.photobucket.com/albums/n149/trophy_hunter/DSC03261.jpg (http://s111.photobucket.com/albums/n149/trophy_hunter/?action=view&current=DSC03261.jpg)

Better clean up that mess, could cause all sorts of handling issues.

[bassracr]

It is wild to me how SO many people have had SO much seccess with SO many different types of props with the Vector/V6 setup. Seems like you could buy and try props from now to the end of time, or till your pocket book runs out:eek: , looking for the perfect wheel for your particular rig.

I pretty much have the same setup as steady streamin, and it will be interesting to see what wheel brings the big numbers.
if your setup is all proper,several wheels will bring the big numbers

[bassracr]

Better clean up that mess, could cause all sorts of handling issues.
i agree with transom stand... you gotta have everthing proper to be able to drive the boat at high speed and keep it balanced on the pad to get your best numbers. if its in your budget,i would have your internals inspected to make sure the gearcase is worth spending the money to have it redone,I would send it to bobs and have him redo it and weld a torque tamer and new nosecone.tell him your application and he will get it dialed in for you

[steady streamin]

Once you get the itch, it seems like the budget goes out the door.....:reddevil:

[bassracr]

Once you get the itch, it seems like the budget goes out the door.....:reddevil:
its all worth it to have a boat that drives and performs the way it should. there are no shortcuts to make it handle properly :cheers:

[WATERWINGS]

Better clean up that mess, could cause all sorts of handling issues.

I see your nose cone is cracking at the seam like mine.

Bob's said it wouldn't hurt anything, and that it was tack welded on, and it wouldn't come off.

I have "V"ed mine out twice and repaired it, only for it to crack again.

[hydrostream79]

Me too. I just finished fixing mine. Not sure why because I bet ya it will do it again the next time I take it out.:mad:

If you spent the bucks to have bob's do it, would it hold and not crack I wonder????




I see your nose cone is cracking at the seam like mine.

Bob's said it wouldn't hurt anything, and that it was tack welded on, and it wouldn't come off.

I have "V"ed mine out twice and repaired it, only for it to crack again.

[P man]

Ive got a Vector with a 2.4 225 and I can spin a 30" Merc Cleaver into the high 80's so far.
'Looks' like you've got a straight skeg with a bob's torque tab... My boat didnt like the straight skeg at all.
Grind that gearcase right down to the metal and spend some time with a good epoxy getting it straight and true.
Also pull the water pump off and fill the original water intake cavity so that it won't crack there either (you can use 3M 5200 to do that)

Best thing I ever did was go to a gearcase with a cone (like yours) and a swept skeg/welded torque tab.

[WATERWINGS]

Me too. I just finished fixing mine. Not sure why because I bet ya it will do it again the next time I take it out.:mad:

If you spent the bucks to have bob's do it, would it hold and not crack I wonder????

I did have Bob's do it, and it is supposed to be tack welded......then why would it move enough to crack the filler?

[steady streamin]

Pulled the lower unit off, gonna try to do a cleanup. Will be running the chopper in the next couple of days, will let yall know.

[transomstand]

Grind off all that crap. Check to see if the cone is welded (it may be epoxied on). If there is epoxy on it, be sure to use an epoxy product to fair it in, the problem many people have is installing with epoxy, then fairing with a polyester product, the poly doesn't stick well over epoxy.

[steady streamin]

well on my way, found four different colors of a mix of bondo and epoxy...:eek:

<a href="http://s111.photobucket.com/albums/n149/trophy_hunter/?action=view&current=DSCN1505.jpg" target="_blank"><img src="http://i111.photobucket.com/albums/n149/trophy_hunter/DSCN1505.jpg" border="0" alt="Photobucket"></a>

[beamrverbeek]

I did have Bob's do it, and it is supposed to be tack welded......then why would it move enough to crack the filler?

your talking about two different materials and two different raits of expansion from hot to cold. everyone that i have seen that has been ground out a little and refilled just cracks again. to do it right you need to remove everything and start fresh on a clean surface.

[P man]

Im sure there are lots of great materieals to use out there but seems to be working for me so far is a west system epoxy loaded with an aluminum powder as filler

[hydrostream79]

Wouldn't you want to mold that touque tab in also with some kind of filler while you were at it? Looks like a pretty blunt edge on there?

[steady streamin]

Got it all ready for paint now. I did go ahead and fill in the torque tab, figure it help. Went with some west systems. Should be alot better than before.....

<a href="http://s111.photobucket.com/albums/n149/trophy_hunter/?action=view&current=DSCN1512.jpg" target="_blank"><img src="http://i111.photobucket.com/albums/n149/trophy_hunter/DSCN1512.jpg" border="0" alt="Photobucket"></a>

[hydrostream79]

You think that she is ready until you put that shiney black paint on :D

Lookin good

[bassracr]

if you have a a professional gearcase person that could cut the skeg back and weld on a torque tamer like bobs' jc's or titus ..i would highly recommend it!

[steady streamin]

Thats when that budget thing comes back into play ....:cool:

[panther150]

The true meaning of B O A T as I was told is: Bring Out Another Thousand!!!!LOL Good luck with you're setup, looks great!

Steve

[steady streamin]

Well got it all done to the best of a couple of power tools and in my garage. Now its testing time...

<a href="http://s111.photobucket.com/albums/n149/trophy_hunter/?action=view&current=DSCN1514.jpg" target="_blank"><img src="http://i111.photobucket.com/albums/n149/trophy_hunter/DSCN1514.jpg" border="0" alt="Photobucket"></a>

[beamrverbeek]

You think that she is ready until you put that shiney black paint on :D

Lookin good

:iagree: you got some more work to do:thumbsup:.

[steady streamin]

Well finally got out today, and ran a inch above the pad with the 30p chopper and couldnt get higher than 5500 rpm's at 79. Would run a consist 78-79 seven or eight times. If i would trim up passed the sweet spot to get some more rpm's it would get lifty.

So should i raise the motor a bit more, maybe a 30 might be to much....

[hydrostream79]

It just starts getting good when it gets "lifty":D


Glad to hear that you are making progress:thumbsup: Damn wind has been blowning 25+ all week here, so no stream testing for me:nonod:. Maybe next week.

[WATERWINGS]

[QUOTE=hydrostream79;1692519]It just starts getting good when it gets "lifty":D QUOTE]

BIG GRIN..........:D......aint that the truth brutha..........(but don't rush it):cheers:

[wideglide55]

You need about 600 more rpm,28 ought to be just right,my 300PM wouldn't pull a 30p on my Daytona.Get a Mazco RE-3 or RE-4,I started with a big ear Merc chopper,went 85mph at 6400rpm on the limiter,put on the Mazco Re3 29 went 96mph at 6150.The Merc prop had 18% slip the Mazco had 8% slip.Mazco are one of the best and the fastest.