SeaDoo Supercharger with ET137 Not getting boost


#41

Some reason just before going to bed it popped in my mind that I put the wrong value…it’s 14.7 for stoichiometric mixture.


#42

i hopefully will be out this week
Im going to shot for slightly richer mixture so that i can keep everything cooler


#43

Help I was checking


#44

Help
I was check the slip on the supercharger and the spindle snapped so now I need to replace the spindle on the supercharger how fast can you do this is there an upgraded shaft that can be torqued on
I would like to get this done ASAP


#45

I was not at 15 lbs of slip.


#46

What do you mean by spindle? Can you take a pic? We can definitely get something out to you in the morning, overnighted if needed


#47

Joe
Thanks for the response
The super charger spindle is trash basically. i over tightened the nut by the gear and it snaped off.
So my options are.

  1. Get a rebuild kit and install a new spindle or shaft.
  2. send to you to rebuild (how much time for you to rebuild)
  3. get a new supercharger the xxx-2 (do you have instock)
    this seems to be upgraded
  4. get the Et tech 68-140 extreme with the third bearing (do you have instock)
    Thanks for your answers. i will be checking my email tomorrow as i would like to get riding again this Wednesday

#48

So the riva xxx IS an ET68-140…they just have ET anodize the wheels a different color. Killer supercharger for sure.

Rebuild from us would be the normal $435. You would still need to check slip after 5-10 hours, then regularly ever 15 hours for the ET137. (Same thing for the xxx as well).

To help you out, I can send you a good shape shaft if you want to try extracting the current one without damaging your bearings. Least expensive route, but also most risky.


#49

Do you have either in stock that I could get by Monday


#50

Yes XXX ready to go. ET would take a few weeks.


#51

All ordered up. I was slipping at 12.5 lbs before so hopefully now it will be better


#52

Things are going nice. I ordered up some 100 lbs injectors. I can not seem to get the fuel right and the speed up with the 50 lbs ones with the new xxx-2 charger.
At this point do you think i should also switching to a open loop for the engine. My lake is rarely over 80 degrees.Hopefully the injectors will help me standardize and then a riva tune will work and i can just go out and ride and beat everyone in the group by several boats


#53

Sweet…anyone getting even close to your speed?

Open loop is the way to go now for sure.


#54

Riding Last night
8350 rpm
only 12.5 boost with the xxx-2 charger so
at 8100 rpm i only had 12 pounds and should be at 15 pounds
top speed was only 70 mph (very disappointing)
i keep getting a h temp in the exhaust wich seems like i am maybe blowing out the water of the water box. I think this because with a rider on the back this doesnt seem to happen


#55

I’m starting to wonder if you have a crack in you intake manifold and leaking some pressure. Im guessing there is a boost leak somewhere.


#56

i have pressure tested to 22 psi and have fixed the leaks


#57

And still only 12.5 psi? Double check clutch slip on that charger


#58

what should it slip at


#59

Are you getting any cavitation? If you’re hitting full RPMs and not cavitating, then your pump impeller needs to be changed


#60

I get some Cavitation down low when i take off. I do not think i get any on the big end.
But why is it only 12.5 at 8100 when it should be 15.
and what is the proper slip point for the xxx-2 charger
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