need help, advice, anything you can offer

[jreaper]

first off i have a 2006 gtx nonsupercharged 155hp model ski.

i recently had some rock damage to my stock prop so i changed it to a solas 12/20 prop. (not sure if thats good for my application) right now im running with no nose cone waiting for the right one to come in. i also replaced the wear ring with a oem seadoo replacement. besides the prop i installed a r&d intake and a free flow exhaust section that replaces the restrictive sound suppression system.

before everthing was installed (stock) i could get 63mph on the seadoo speedo ( i know its not accurate) with what i have done i could only get it to 58 today at 7000 rpms + or - a few. conditions were abot 80 and pretty calm. it was in a river so there is a current so i tryied both directions and i think a gained 1mph with the current so basicly it was the same. also both of these readings are from the same river.

now what i need to know is. what part is causing the decrease in power. in my opinion its the prop. i know the more air you can take in and let out of motor the better it runs but i could be wrong. what i don't want to do is keep going back in forth from my house to the river doing test so anything i can eliminate would be great.

anything you guys could do for help would be greatly appreciated ive learnt so much form you guys already. and i'm deff glad i came across this forum

[JP]

Hey new dude, welcome to the club...

12/20 on a 155??? You're trying to run WAAAY too much prop for that ski...

Good luck mehn...

JP

[Danny]

Thats way too much prop for a NA motor. That prop needs a SC behind it to turn it...You could take some bend out of the prop, get the R's back up....

[jreaper]

as i figured do you guys know what a good prop would be for it. or at least what comes stock?

[Danny]

Actually, there really is no other prop for the ski othr than that one. since you are not a SC'd or IC's motor, you only have the 2 choices (12/20 or 13/20) because your driveshaft is a different size...

I would either depitch the Solas, or get a stocker and pitch that one...