JPass
Well-Known Member
You can check the wear ring to impeller gap with a feeler gauge once you remove the pump. The tolerances are 0.35mm or 0.014in
What went wrong with 08 speedster launch
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You can check the wear ring to impeller gap with a feeler gauge once you remove the pump. The tolerances are 0.35mm or 0.014in
gazzaskirepair
Active Member
Basically a hacksaw blade thickness is max
SHESAH
Active Member
Yesterday, I wasn't able to work on the boat at all. I'm going to try reving it up to full throttler today. If it does, do I still proceed to pull the jet pump and check wear ring gap?
JPass
Well-Known Member
So you know the motor under no load will reach the max RPMs. Now you need to figure out why she won't rev out while under load.
Have you done a compression check on the motor at all? Post some pics of the impeller and pump when you remove it.
Also check to see if you can spin the impeller on the supercharger.
Let us know what you find.
Have you done a compression check on the motor at all? Post some pics of the impeller and pump when you remove it.
Also check to see if you can spin the impeller on the supercharger.
Let us know what you find.
SHESAH
Active Member
No compression test, yet. I'll need to look up the procedure for that and the supercharger impeller.
Unfortunately, I was only able to remove 2 of the 4 bolts from the pump. The other 2 bolts look like whoever worked on them prior did a wicked number on them.. they had barely any thread but I was able jam the bit in deep enough to grip with impact drill, still no luck.
I think I need stronger than 18V drill. Full battery wasted without budging bolt. I also used a bit for stripped bolts on the outside to no avail
Was off to a good start but like all great things, nuisance makes an appearance
Glad it reved up though, I've no idea what it means just feeling I got kind of lucky, lol
I'm optimistic thanks to you guys
SHESAH
Active Member
Who knows Popps, my buddy Miguel RIP always found ways to make things faster..modifying reverse sounds weird.. maybe something else is off.. I would not put it passed him to create some sort of cut-off to prevent theft being from Queens
JPass
Well-Known Member
Compression test example can be found HERE. While it's not for your boat, the procedure is the same. You should have roughly 120psi in each cylinder and no more than 10% difference between the lowest and highest cylinder. Better to test on a warm engine.
Post some pics of the pump bolts you're struggling with. You may want to soak the bolts in a 50/50 mixture of acetone and automatic transmission fluid to help free them up. Be careful as the mixture can remove paint.
As for the supercharger impeller check, you need to remove the hose from the supercharger to your throttle body. On the supercharger outlet, you'll see the impeller blades. If you can spin them or move them with your fingers, than your supercharger is slipping and will need to be rebuilt.
Post some pics, so we can see what you're dealing with. I had some stuck reverse bucket bracket bolts a while back and was about to get them out with an extractor (female).
If and when you get them off, be sure to coat the bolts and the holes in the bracket with waterproof grease to prevent them from freezing up again in the future. It's also good practice to remove the pump assembly each year and to regrease everything to prevent the issue from happening again, especially if you run in salt water.
Post some pics of the pump bolts you're struggling with. You may want to soak the bolts in a 50/50 mixture of acetone and automatic transmission fluid to help free them up. Be careful as the mixture can remove paint.
As for the supercharger impeller check, you need to remove the hose from the supercharger to your throttle body. On the supercharger outlet, you'll see the impeller blades. If you can spin them or move them with your fingers, than your supercharger is slipping and will need to be rebuilt.
Post some pics, so we can see what you're dealing with. I had some stuck reverse bucket bracket bolts a while back and was about to get them out with an extractor (female).
If and when you get them off, be sure to coat the bolts and the holes in the bracket with waterproof grease to prevent them from freezing up again in the future. It's also good practice to remove the pump assembly each year and to regrease everything to prevent the issue from happening again, especially if you run in salt water.
SHESAH
Active Member
JPass
Well-Known Member
Yeah. You have a couple of options left at this point to get that bracket off. You can try some heat on the bolt hole body and the impact gun. You can try a huge breaker bar and those female extractors. You can try to get some penetrating oil in there, but not sure how you'd get it past the bolt head, or you can simply cut off the bracket and bit the bullet for a new one.
Mine were pretty stuck and took several days of soaking in 50/50 ATF and Acetone, but I had the time to wait and it finally worked after multiple applications per day for several days.
Mine were pretty stuck and took several days of soaking in 50/50 ATF and Acetone, but I had the time to wait and it finally worked after multiple applications per day for several days.
SHESAH
Active Member
Man, this is extreme! I sprayed bolt head, seal plate area, and towards bolt exit with the blaster product. It seems to have penetrated..I'll re-apply few more times over next hour, give couple hard taps, wedge w pry bar, then try removing with impact drill paint stripper heat gun.
In the meantime, I'll head out for compression test guage and ATF for mix
Now, the pry-bar is stuck smh
I'm going for ride to breathe this out..
Before I go want to confirm if it's possible to remove the rear bolts shown in pictures below to extract everything and get onto workbench with clamps? I can reach the rear bolts w an extension just unsure if it is safe to do so?
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gazzaskirepair
Active Member
Be careful using heat you'll probably damage the housing the pump is mounted too.
Looks like you may end up having to drill the bolt heads off then soak the remaining part of the bolt as i believe the liquid is not getting onto the threads.
Was this a fresh water or salt water machine?
Looks like you may end up having to drill the bolt heads off then soak the remaining part of the bolt as i believe the liquid is not getting onto the threads.
Was this a fresh water or salt water machine?
SHESAH
Active Member
Madpaddler
Member
IDK why it wouldn't rev past 4800 in-water, but if it was turning 4800 RPM and only going 4-5 mph, that's almost always a wear ring issue. If it's one of the original style made up of different layers colored black and white, I have had several of those delaminate between the layers and the inside layer (next to the outside edge of the impeller) tends to separate and come apart. Which leaves you with about 1/4 inch of clearance around the impeller. That'll cause cavitation like crazy. But it'll also usually rev to the redline no problem.
JPass
Well-Known Member
Yes you can remove the pump from the boat to work on it on the bench.
gazzaskirepair
Active Member
with a ski you can hold the throttle wide open so on the boat i would do the same but hold it open at the throttle body
you gonna need another set of hands to hold the start switch make sure you have a fully charged battery
confirm you not getting the check engine message on gauge when you cant rev it in water, sounds like its in LIMP mode
you gonna need another set of hands to hold the start switch make sure you have a fully charged battery
confirm you not getting the check engine message on gauge when you cant rev it in water, sounds like its in LIMP mode
SHESAH
Active Member
I have to check the video again..I ran it for a few minutes to warm it up and mistakenly turned engine off prior to cutting water off so i turned back on then cut water off and I got a constant beep then shut it off
I apologize guys..I need to confirm the correct order of steps and when to take out plugs
SHESAH
Active Member
Ok, I would like to get compression test out of the way first but I lost focus, totally overwhelmed
WHat a doof! I think I got it, had to watch video. I'll be right back!
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gazzaskirepair
Active Member
is the throttle cable installed in the wrong hole on throttle body cam ?
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