GTI SE impeller pitch

[oldwill]

(Posted this originally in the boat section, rookie mistake, thank you Alainm for the help)
Greetings all, do not post very much at all but spend loads of time gathering info. I have a question that I cannot seem to find a consistent answer for. I am looking for the stock pitch size for the impeller on a 2007 GTI SE 155. I purchased it about a month ago and thanks to this site have changed the oil and filter, changed the coolant, replaced the spark plugs, change the OPAS rubber tubes (yes, I am going to keep it} and replaced the wear ring. It runs great with no issues. Had nothing but 2 strokes prior to this one, ( 2002 RXDI, 2001 GTI, 95 GTI, 94 GTI and a 1993 SPX ) Still have the RXDI, what a great ski! Also have the 2001 GTI.
When replacing the wear ring it appears that the impeller may not be stock. It is a tad beat up so would like to replace with a different one and a stock pitch one. I have searched all over the place and cannot find a consistent answer to what is the stock pitch impeller. Part # 267000675 I can find a replacements but no one seems to know what pitch it is. I have gotten responses that are 10/18, 11/21 10/21 and even a 12/21. Not looking for an upgrade or aftermarket unless it is the stock pitch. Will most likely buy a used one and clean it up a bit. A new one seems a bit expensive!! But leaving my options open.
Any help in determining the stock pitch would be greatly appreciated!

 

[mikidymac]

So impeller pitch is not a standard, that is to say there is no standard pitch gauge as every manufacturer rates and measures it differently.
So a 11/15 Solas, a 11/15 Skat and a 11/15 OEM are all going to be different impeller pitches.

If you have an OEM seadoo impeller then send it to Impros for refurbishment. Seadoo was really good at selecting pitches so there is very little to gain from an aftermarket one unless you are getting out of stock use like high altitude or always pulling a tube.

 

[oldwill]

So impeller pitch is not a standard, that is to say there is no standard pitch gauge as every manufacturer rates and measures it differently.
So a 11/15 Solas, a 11/15 Skat and a 11/15 OEM are all going to be different impeller pitches.

If you have an OEM seadoo impeller then send it to Impros for refurbishment. Seadoo was really good at selecting pitches so there is very little to gain from an aftermarket one unless you are getting out of stock use like high altitude or always pulling a tube.

Thanks for the info, very interesting. I did not realize that different manufacturers are that much different with the same pitch. I am not sure if the impeller currently on the GTI is stock. I have an impeller gauge, and the one I now have is an 11/19. What is a stock pitch for an impeller for a 2007 GTI se 155? That info would really help out as to get this on refurbished or get the proper one.
Thanks !

 

[mikidymac]

Stock is listed in the factory service manual as 10/21 but again, it might not be the exact measurement on a pitch gauge.

 

[oldwill]

Thanks so much for that information. I have been having a bit of a challenging time trying to get the stock pitch number for my paticular seadoo. I am pretty good at measuring the pitch and the one I currently have is an aftermarket one, 11/19. I will start my hunt for an oem seadoo impeller #267000675. Most likely a used one since sea doo is pretty proud of their new ones.
Thanks again for that info!