19' eliminator 250 mod vp prop help

**Vzsuper** · 05-01-2017, 04:09 PM

I have a 19 foot Eliminator Daytona with a Mercury 2.4 Bridgeport carbed mod VP motor I'm having trouble getting top speed out of it as to the props I ran a 22 Chopper which got me to 55 miles an hour a 24 Mercury Racing Big Ear Chopper that got close to 70 miles an hour GPS so I switch to a 28 signature cleaver and lost speed I'm barely getting 60 miles an hour out of it maybe 65 at 7300 RPM I do know how to trim and run the Jack Plate I've played around with it from everything three inches below the bottom pad to an inch above and saw nothing faster any help would be appreciated with the numbers we typed in me was 1:86/1 Gear i should be doing 98 miles an hour I'm about to throw a 32 Cleaver on there mercury 2 hole cle low water on there doesnt seem to be slipping bad

**Vzsuper** · 05-04-2017, 06:13 PM

No response is sad i was hoping for a little input ... Makes me want to scream and F#&_

**David** · 05-04-2017, 07:48 PM

Knowing speed and rpm with each prop would help. But the speeds seem very low. Maybe all your 250 hp are not there. Do you have good compression?

**capteliminator** · 05-04-2017, 09:24 PM

How much setback? Run it at even with bottom to start. Start trimming out till she breaks free. Those boats like chopper props. Probably a 28 or 30 to start and spin it out 7000.

**Vzsuper** · 05-05-2017, 05:53 PM

Like i said i ran to 7300 rpm each prop and did push to 8000+ but to no evail 22p 55 mph 7k 24 chopper 70 mph 7300 rpm 28 ron hill cleaver i thought id see 80-90+ 65mph 7300 rpm all trim angles and height i seriously dont understand why i have a cle 2 hole lower and have started looking into a nose cone but am not feeling prop blowout any help is appreciated

**capteliminator** · 05-05-2017, 06:54 PM

You need a chopper style prop not a cleaver. My 19 ft daytona ran 92 mph with a steve Smith offshore cut chopper and a sportmaster. With a cle it would blow out in the mid 80's . Post a picture of your setup.

**coffeeguy** · 05-05-2017, 07:18 PM

I think you are over trimming to get the rpm. What is your rooster tail like?. On my heavy 175 hp mod vp the cleaver was a real disappointment 14mph slow then the 28 A-5.

**Vzsuper** · 05-05-2017, 08:33 PM

What pitch chopper thats what i figured im looking at a 28 chopper plenty of power

**Vzsuper** · 05-05-2017, 08:37 PM

I think the prop is not hookin as well i said it before i could go through every trim mode and transom height with little to no gain in mph or prop spin i seriously thought it was going to be at the edge of my max pitch coming from a 24 chopper it hooked up great but hit top end and had plenty of power to pull a taller pitch, i just wanted to cruise at 55 with lower rpms and still be able to top out at 80+

**Vzsuper** · 05-05-2017, 08:41 PM

Originally Posted by coffeeguy

I think you are over trimming to get the rpm. What is your rooster tail like?. On my heavy 175 hp mod vp the cleaver was a real disappointment 14mph slow then the 28 A-5.

I know how to trim i didnt have to trim up to get the rpms the engine has plenty of power with the cleaver i only saw less bow lift and a little more stern lift

**coffeeguy** · 05-06-2017, 04:09 AM

Your goals are the same as what I wanted. Cruise between 50 and 60 and top out over 80.
With my A-4 (48 76108A4-28)would cruise(at about 5500) about 50 and top out about 74.
The A-5(48 13372-28 )was cruising in the low 50's and topped out at 78
With my Chopper II 28( 849356-30 which started as a 30 but reworked to a 28) it cruises about 60 and topped out at 81
With the cleaver 28P it was cruising under 50 and topped out at 66-67
I have not tried a ET yet but watching guys with similar style hulls it may work better then the Chopper II
You have a lot more power then I. A large pitch and diameter bow lifting prop should work well
I would say try a Chopper II 30 or the same with an ET

**Vzsuper** · 05-07-2017, 12:40 AM

Originally Posted by coffeeguy

Your goals are the same as what I wanted. Cruise between 50 and 60 and top out over 80.
With my A-4 -28 It was cruising(about 5500) in the low 50's and topped out at 78
With my A-5 28( which started as a 30) it cruises about 60 and topped out at 81
With the cleaver 28P it was cruising under 50 and topped out at 66-67
I have not tried a ET yet but watching guys with similar style hulls it may work better then the A-5
You have a lot more power then I. A large pitch and diameter bow lifting prop should work well
I would say try an A-5 30 or the same with an ET

What os tje A-4 A-5 mean os that a type of prop merc code ?

**coffeeguy** · 05-07-2017, 05:12 AM

Here is a good explaination:
http://corboatracing.com/mercury-chopper-prop
I was mistaken in earlier post the reworked 30P-28 P was a Chopper II

**stoker2001** · 05-07-2017, 06:39 PM

if you picked up 15 MPH and 300RPMs from 22 to 24,the 22 has a spun hub or in reality has way less pitch then marked

**Vzsuper** · 05-07-2017, 10:59 PM

Originally Posted by stoker2001

if you picked up 15 MPH and 300RPMs from 22 to 24,the 22 has a spun hub or in reality has way less pitch then marked

I am stating top speed at 7300 rpm with each prop not a loss of rpm anywhere plenty of power i can and have turned 8k + but dont know where the danger zone is the engine naturally wants to turn 7k half throttle i did some checking to make sure i had 1.87 gears i do

i dont understand how the 28 cleaver was such a dog it would wind up on launch but hook in a boat length and pull im going to take my props to the shop tomorrow and hopefully a 28 or 30 re3 or yamaha drag will do me right im on the fence about a 32 but the stv guys are turning smaller props faster