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Problem Solved.

3K views 28 replies 6 participants last post by  Shaun 
#1 ·
Those of you that where helping me with the stumbling thread i went out this weekend and since it was raining most of the day nobody was on the water and i got to stand on it for a bit. The stumbling continued.. Next day group of us went down to the sandbar and while i was there i decided to adjust the floats. What i ended up finding was that the primary bowl on one carb was adjusted way too low! The secondary on that same carb was pretty low also. On the other carb the secondary was perfect but the primary was a full turn too low. After setting them all to where they just bearly leaked out the bowls peep hole i ran the boat and i noticed that the boat felt stronger when stomping on it for a sec. That evening once all the ocean boats pulled out i went out for some runs and the stumbling no longer exists! Problem solved!
 
#3 ·
knew you would get it Shaun. Some people just don't relize how important float level is. If your carbs are inline with the sec to the rear, you can raise the sec a little to help keep the jets covered, but just a little. The float level plays a huge part in how fast the carb jumps on the main jet. Good job



 
#6 ·
they won't hurt, but if you are not having any stumbling problems between the time you nail it from a idle till the boat planes I wouldn't bother. If your carbs are mounted inline, are they vac sec. If so, I really wouldn't bother. You aren't even on the sec until after the boat rolls over



 
#13 ·
ok i found the kit you where talking about but it's for center hung floats and mine are side hung. I cant seam to find any for side hung.
Cant get them for side hung floats. Honestly I wouldnt worry about it. If you do, you need new float bowls lines and extensions. (4150 style)
 
#14 · (Edited)
hallett is right, sorry for the wrong info, and if you put center hungs on, you will have to turn your carbs sideways, and then you won't need them any longer. You can't get center hung bowls to clear inline. If it doesn't stumble, don't worry about it. So just get back on the water and enjoy



 
#19 ·
Your manifold doesnt quiet sit as tall as mine does from the looks of it, but your scoop helps wided things out. With mine and the flower pots i think it will make the motor look like a cross (+). It may look fine but this is just my guess because when i mocked up a horizontal puke tank up behind the carbs it looked retarded to me.

Your setup looks fine to me but it's a angle shot, give me one straight at it from the front of the boat and i'll tell you what i think :D
 
#24 ·
Hey Paul, At this point and time of my MANY boats, agreed. The problem with alot of jet-boaters is all the H/P in the world will not go fast if you are trying to push half of the lake out of the way. Most flatties and cruiser boat guys already figured out the part about make it loose and that makes it fast. It would be ten-fold for a jet. Raced those for a while and found out real kwik that the more efficient it ran on the water the faster the boat went. If I was driving a boat and looked over my left shoulder and saw any water off that side of the boat meant the bitch was to sucked down and time to free it up. Underwater hardware needs to be corrected. Also this will piss alot of guys off. A 500 h/p motor will push a somewhat light 18 or 19 ft boat 80 mph in a heartbeat if the underwater shiat and the pump or in a V-Drive If the bottom and plates are right. IMO M
 
#26 ·
Yeah, I hear what you v-drive boys are saying, but once a jet guy - always a jet guy!

She really does air out well, but I'm fighting a serious porpose at around 76mph. That pic above was taken just cruizin at around 3200rpm or so.

Part of the current project includes flipping her over and having the bottom blueprinted. BTW - Does anyone have Bennett's number? :D
 
#27 ·
XClutchboy725, what kind of power you putting down and with what impeller? I ran 76.9 the trip before this last one on GPS. I forgot my handheld this last trip though and now that i got my stumbling problem fixed i'm thinking i crossed into the 80's. Pump is stock for the most part. Only things i have that i would consider performance on the pump is the ultimate wear ring, my bowl is a JC that i had converted to a JG, and i have a place diverter. My intake is in the boat about 6-7" so i want to get it set back this winter. Also i'm running the stock rock grate with no loader! I'm really curious what i will get out of this boat once all done.
 
#28 ·
I just had Jack freshen up the pump and killed the main bearings on the first trip out.

Pump is set up with an American Turbine "B" cut detailed by Jack with an inducer also detailed by Jack. Bowl was also done by Jack.

With 4 people on board and FULL of fuel I was hitting 78 on GPS. Tried later in the day with just 2 of us and discovered a serious porposing problem that didn't happen with more weight in the boat. The porpoise was really scrubbing off speed. Then I heard the rpm's drop a little and looked at the oil pressure. no good! 20 lbs.....

Took her apart to find the head of the pick up tube ratttling around on the end of the tube. The rest is history.

I think with the right set up on the hardware and getting the bottom blueprinted, I should be into the low 80's.

You'll definitely be there with a little tuning. :)devil
 
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