- Location
- Thousand Oaks
My stock 99 sj feels gutless when I get in the bottom of a wake. What are my best options to give it some more pop when the jumping boat wakes.
SJ power over boat wake
- Thread starter Gski251
- Start date
- Location
- Charlotte, NC
You could have a number of things. Tired engine, improper carb tune, burned up, or chipped impeller causing cavitation. Has the engine been gone through that you know of? A compression check and a engine leakdown test to make sure you dont have an air leak anywhere. You could have water leaking into the combustion chamber or exhaust somewhere. I've ridden properly setup stock superjets than ran really well. If the engine is mechanically sound and the carbs are clean and in good mechanical order, then look at the impeller and pump. I'd definitely make sure the engine is in good condition before adding a pipe or a higher compression head. If the engine isnt sound, adding any bolt ons like that will kill the engine in a short time.
- Location
- the jetski grave yard
You just need to hit it with more speed and in the exact correct spot on the wake . You can waste a lot of money trying to make a 701 put out the desired power
You will seldom ever have "enough" power. It will cost $2-3000 To make a 701-760 good, and an additional $3000 for a "better" aftermarket large bore cylinder. From there it gets even more $$$ for the "best" stroker setup. Then you need a short hull in order to get it all out of the water.
- Location
- Thousand Oaks
I probably should go through the engine at some point. I bought it used and not sure of the history. It's unmolested and in pristine condition, visually. It's been in my hands for 5 years now and haven't had a real reason to touch the engine. The compression showed 150 PSI when I bought it and still shows 150 PSI. I replaced the impeller and wear ring last year. I added a hooker 9/15 which made a very small improvement.. What is a cutback?
I am mostly a weekend rec. rider so I am not trying to send it to the moon. However, it would be nice if it had a little more punch when at the bottom of wake. Takes off from a start pretty well. This is the only superjet I have ridden, so unfortunately for me, I have nothing to compare it with. Maybe that's just how it is. How about these waterlogged trays that I hear about?
I am mostly a weekend rec. rider so I am not trying to send it to the moon. However, it would be nice if it had a little more punch when at the bottom of wake. Takes off from a start pretty well. This is the only superjet I have ridden, so unfortunately for me, I have nothing to compare it with. Maybe that's just how it is. How about these waterlogged trays that I hear about?
- Location
- Lake Havasu City, AZ USA
The back of the impeller hub is cut back typically 5-7mm. It allows the back edge of the impeller blades to get as close as possible to the pump stator veins. It's suppose to make less pump slippage and better hook up. I have always had my local machine shop do it for me.
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- Location
- Thousand Oaks
Interesting. Is there a notable difference?
- Location
- Charlotte, NC
Probably minimal difference on a stock ski. Be more noticeable in choppy water better hookup
bored&stroked
Urban redneck
- Location
- AZ
I doubt it will make much of a difference on a prop that is already known for excellent hookup and bottem end power....
A 701 superjet with a hooker 9/15 is not lacking response power wise. You need to time the throttle better, and get a pipe if you want more power.
A 701 superjet with a hooker 9/15 is not lacking response power wise. You need to time the throttle better, and get a pipe if you want more power.
He has a stock 99 SJ. Oops I see he added a 9/15. I HHHAAAATTTEEEE that prop! I gave one away years ago.
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OP I'll hook you up the exact way I was hooked up by the best in this sport/hobby.
I was told and did exactly what I was told and have been smiling ever since....over a dozen years.
Call Impros in California and ask for a 13/17 repitched to a 13/16 and cutback 3mm. They have great notes (even though Dave is gone) and will know exactly what you are asking for.
Then reach out to anyone on here that can bore your nozzle to max and enjoy!!
I was told and did exactly what I was told and have been smiling ever since....over a dozen years.
Call Impros in California and ask for a 13/17 repitched to a 13/16 and cutback 3mm. They have great notes (even though Dave is gone) and will know exactly what you are asking for.
Then reach out to anyone on here that can bore your nozzle to max and enjoy!!
bored&stroked
Urban redneck
- Location
- AZ
Your are the only person I've seen post they hate a hooker prop...
I switched right back to my 13/16 cutback. People have told me I am wrong and I don't get it!!!
bored&stroked
Urban redneck
- Location
- AZ
Well now I really want to try a cutback 13/16 lol
The big hub skat I'm currently running does not impress me. It doesn't feel any different then the old solas original line prop I had in there before.
The big hub skat I'm currently running does not impress me. It doesn't feel any different then the old solas original line prop I had in there before.
13/16...bored nozzle...stock come. Apparently old school. I have tried quite a few prop, nozzle, cone combos over the years and this one is it IMO. I would love for someone to tell me why! Lol.