JAE GAS REAR HOP

[Albert Araujo]

Hello Guys,

I built a JAE Gas rigger and can't seem to get the rear end to settle down in the water. Are any of you guys dealing with this and if so how did you get rid of it. My engine is set at the 20" mark. They rec 19" to 20" forward of the transom. I set mine at 20" Ready to run weight came in at 13 and I have 8 pounds on the front sponsons. This is pretty close to the 60/40 weight distribution they call for.

Strut is set 1/16 higher than ski and perfectly level. Tub is also perfectly level and all three ride pads are flat on set up table. Rudder is 1.6 X Dia of prop below CL of shaft. Rudder is angled up on TE bottom to eliminate rudder lift. Tried V967 - 21 series - 14 series props.

My gut feeling, if you look at the JAE 21 and the 45 and figure the weight compared to ride pad surface you will find about 1 pound per 1" of pad. Most typical riggers in this weight range are running about 9.5" of pad verses the JAE Gas at 5.8.

Could the rear be hunting for more support causing it to oscillate up and down?

Albert

 

[julianconde]

you need to get in touch with Joe Petro

 

[Albert Araujo]

Who has his number?

 

[shoboat]

Albert,

Have you tried an ABC 2716/3 or a 2718/3?

It works very well. And I have them in stock again.

Thanks,

Mark Sholund

 

[SayMikey]

Albert,

Have you tried an ABC 2716/3?

It works very well.

Thanks,

Mark Sholund

Our boat has no ill habits with a Voo Doo 2716

 

[jeff baham]

try raiseing the strut a little. may have too much blade in the water.

 

[dave weagel]

albert,

contact joe petro via toll free phone number on website zippkits.com 866 922 9477

note his vacation dates.

 

[Albert Araujo]

try raiseing the strut a little. may have too much blade in the water.

 

[chris armstrong]

i would drop the strut flush with the ski and see what happens.. i think not enough prop in the water.

What happens when you go to a bigger or smaller prop?

 

[Glenn 787]

I haven't had much time to run mine but I didn't experience any rear hop problem. The only prop I tried so far is a mod 2818. It's setup close to the instructions except for a couple adjustments to help it track straight.

 

[Albert Araujo]

i would drop the strut flush with the ski and see what happens.. i think not enough prop in the water.

What happens when you go to a bigger or small prop?

I set it up exactly as per the specks, strut level 1/16 from bottom of table. I then lowered it to the bottom of ski and raised it. The only time the hop went away was with the strut 1/4" high. Lost speed and can't live with that. Tried smaller props and it got much better but no speed. What I can't figure is that I ran 80.2 with the V967 on a home made rigger with standard weight up front config. Light rear end compared to the JAE but yet MY JAE wants to lift the rear. Checked all the sponson angles and they are all dead on to the kit and instructions. Go figure!

 

[shoboat]

Albert,

Try some weight on the strut.

 

[steve wood]

take out some strut angle

 

[larry gottschalk]

V967 props have a good bit of lift in them. Talk to Joe and try a different prop to see if its set up or prop.

 

[Jerry Muro]

I have tried the 2818 and also a 2718/3 from Mark the 2718 is faster neither one makes it hop. My strut is set on my ski flat/ working wit turn fins right know.