Supercharger rebuild follow up concerns

[Donna]

I removed the Supercharger and from the Seadoo, and noted that the impeller spun freely. After the teardown and rebuild with all new parts except for the impeller and housing I found that the impeller seemed to have more resistance. I have concerns about the rebuild even though the torques and installation were followed. The slipping movement was also noted to be just between the values in the instructions. After careful consideration I can assume that the impeller tightened up against the step collar and new oil seal are creating the resistance and after it has been installed that it will quickly break in the two surfaces and it will be just fine. I carefully chose the word assumed, is the resistance normal?

signed
overly cautious

 

[Donna]

Thus far no one is willing to bite, I have a good understanding of the physics when two or more surfaces or torqued against each other. As I mentioned above the impeller is being torqued against the step collar which is against the oil seal. I was wondering if all new SCs have the same resistance when new. When the impeller is removed the bearings allow the shaft to spin almost effortlessly. It is when the impeller is installed and torqued to the required ft lb that the resistance is present. I have other maintenance that I need to perform, so I guess I'll wait for a concurrence before installing the SC.

 

[AircraftDoc]

No absolute guarantees. My brand new one had a little resistance. I poured in a lot of 4tec engine oil into the SC before installing it. The seadoo mechanics recommended staying under 5,000 rpms for a few hours. I did not run it hard till 3hr passed.
Hope this gives you a little insight.

AircraftDoc

 

[Donna]

AircraftDoc thanks for your response. I have taken the impeller off twice since the first assembly. My father and I have experience in both Automobile and Aircraft mechanics, first time rebuilding a SC though. He was my Quality Assurance inspector, but it always helps to know what to expect. I'll keep it under 5k RPM for 3 hours and then perform follow on oil change.

thanks for the insight.
Pat Mudge

 

[Donna]

AircraftDoc thanks for your response. I have taken the impeller off twice since the first assembly. My father and I have experience in both Automobile and Aircraft mechanics, first time rebuilding a SC though. He was my Quality Assurance inspector, but it always helps to know what to expect. I'll keep it under 5k RPM for 3 hours and then perform follow on oil change.

thanks for the insight.
Pat Mudge

 

[Dennis]

I not convinced that you have a issue. Typically the chargers spin fairly free after reassembly.

It seems to me that IF there is a issue it would be that 1 or both of the bearings are not fully seated. I would take a plastic hammer and tap on 1 end of the charger shaft and then the other several times (charger fully assembled) and see if it then turns easier.

:cheers:

 

[AircraftDoc]

Don't feel bad if it fails. I did everything right and I mine failed. Most members recommend sending it out. The dealers replace it with a new one, cheaper than charging to rebuild. The new one is beefed up a little. Runs $866 from Texas.

 

[KK40384]

Don't feel bad if it fails. I did everything right and I mine failed. Most members recommend sending it out. The dealers replace it with a new one, cheaper than charging to rebuild. The new one is beefed up a little. Runs $866 from Texas.

I'm trying to wrap my head around this, How is $866 less than what my dealer charged me to do a full rebuild with a upgraded kit including the upgraded shaft that ran me $515 out the door. Now i can take the charger off myself, buy that same kit with all upgraded parts (shaft included) for $295 plus shipping and send it out to Jerry for a total of ariund $400 give or take depending on shipping costs. Your $866 just doesn't make any sense to me.

 

[mattydipps]

I'm trying to wrap my head around this, How is $866 less than what my dealer charged me to do a full rebuild with a upgraded kit including the upgraded shaft that ran me $515 out the door. Now i can take the charger off myself, buy that same kit with all upgraded parts (shaft included) for $295 plus shipping and send it out to Jerry for a total of ariund $400 give or take depending on shipping costs. Your $866 just doesn't make any sense to me.

yeah ive never understood that.. either

 

[AircraftDoc]

I'm trying to wrap my head around this, How is $866 less than what my dealer charged me to do a full rebuild with a upgraded kit including the upgraded shaft that ran me $515 out the door. Now i can take the charger off myself, buy that same kit with all upgraded parts (shaft included) for $295 plus shipping and send it out to Jerry for a total of ariund $400 give or take depending on shipping costs. Your $866 just doesn't make any sense to me.

Adding is like this. The dealer sells the part for less than retail to itself. The labor to remove and reinstall. =

Dealer remove and reinstall and rebuild labor time plus kit =. And they have to warranty the time and part.

You bring in. They rebuild and full rebuild kit =

Put in the labor $time and shop time - all dealers avg. if you had to pay a mech a your shop and the SC failed and came back. You would be out labor charges. With new, no return.

 

[KK40384]

I get your point but how is $866 < $515 or $400ish for my wallet. I don't care so much how much it costs the dealer to rebuild or warranty or cost of parts. From my perspective either of my options are WAY less than buying a new SC. Plus that doesn't even include labor to install it. You're just assuming that everyone will just rip of their SC and replace it with a new one. Can I or you do it easily? Sure, but a lot of people here aren't as mechanically inclined and more just weekend riders that don't want to do much more than put gas in their ski and ride. Dealer does the rest. Now that $866 just went past $1k

 

[AircraftDoc]

I get your point but how is $866 < $515 or $400ish for my wallet. I don't care so much how much it costs the dealer to rebuild or warranty or cost of parts. From my perspective either of my options are WAY less than buying a new SC. Plus that doesn't even include labor to install it. You're just assuming that everyone will just rip of their SC and replace it with a new one. Can I or you do it easily? Sure, but a lot of people here aren't as mechanically inclined and more just weekend riders that don't want to do much more than put gas in their ski and ride. Dealer does the rest. Now that $866 just went past $1k

The answer is there. The dealer charges just for the retail of the new. Included is the labor and wholesale part=retail Part $.
If you were in business and had a choice, what would you chose? How much is your time worth?

 

[KK40384]

If I was in that business yes but since I'm not it makes no sense to pay double for the same end result, as most other people here aren't in this business. You're looking at it from a business stand point and I am from a customer stand point trying to find the most cost effective option for me. I'm done trying to explain this to you since you don't seem to understand what I'm saying. Bottom line from a customer's standpoint is that $515 is way cheaper than $866.

 

[AircraftDoc]

If the rebuild is a failure damaging the core and impeller, then new was cheaper all along. 515 plus reinstall labor if dealer is doing the whole thing cost the same for the dealer to throw in the new and call it a day, would it not?. Rebuilds are not warranted. Sending to/having a shop rebuild is cheaper. There is advantages from the light weight 2004 SC cores to the improved 2012 replacements. If you have the newer core - all the better to rebuild it. Some of the DIY rebuild kits are not that great and instructions with them is non existent. My kits parts list didn't match the manual. When i called the rebuild kit seller, I could not get a correct answer. Using the shop manual only goes so far. So, I am pointing out variables to let anyone to decide for themselves. It's good to know your options. I did not till later.
If you re-read what I stated. That is what the dealers do.