got a 94 Bayliner reflexx with 90 mercury sport jet engine need impeller 15 to 17 pitch for high altitude ?

[Rickey Thomas]

Hi , my name is Rickey Thomas . I live in the Colorado Rockies . recently bought a bayliner Reflexx jet boat and its got a mercury 90 3 cylinder engine . runs great on the hose . took it to the water and it just seems to just plow thru the water . 10 mph max . doesnt feel like its getting up on plane at all . very weak . almost as if its not reaching the power band of the engine under a load at all . After replacement of the plugs and wires . making sure everything is firing with good spark . complete carb rebuild new lines gaskets . ect . then filled with High Octane from the co op it still ran like sh*t. took back to repair shop . they yanked the impeller and sure enough its been replaced . impeller looks new . the impeller casing is a little rough but still useable . so here is my problem is . I need impellers for the mercury 90 sport jet in pitches from 17 to 19, or even a recommendation of what to use that would give me that extras RPM or something designed for use in high altitudes .?? Im about 6000 ft above sea level. Rifle Colorado where can I find these impellers? thanks for your time , frustrated in Colorado

 

[adrianp89]

No idea but that thing looks like fun

 

[Rickey Thomas]

I bet it will be a blast on the Colorado river . just needs more ...

 

[Mike Farrey]

I have the same boat. I picked it up with a gutted drive so I've been doing a lot of research and trying to piece it together. I'm still missing parts for mine but may have a resource for you. I just sent these guys an email looking for the parts I need. I found their reference through a Facebook group for the sport jets. maverick watersports .com
I am looking for the nut that holds the impeller in place. After buying a "complete" drive and having it damaged in FedEx shipping. They busted the corner of the drive unit and the seller's idea of complete was evidently much different than mine because it came without the nut; the lock washer for the nut and not sure about the bushings. I still can't find a nut and washer and bushings for it. It looks like it's a 7/8 reverse thread, but it must have a special pitch. The 7/8 reverse that I found will start to thread but stops on both shafts after about a full turn. My original came with a threaded shaft and missing the threaded shaft impeller. Hope this helps you. I also saw a reference to the exhaust bleeding into the impeller path that caused performance issues.

 

[Mike Farrey]

I Spoke with Maverick Watersports today about the parts I need and I got clarification on which sport jets that they do upgrades to. It is my understanding that they do the upgrades for sport jet 175 and up. If you have the splined shaft he said that the impeller was built much better than the first version with the threaded shaft. He stated they didn't do upgrades on the 90 or 120. from what I found If you are getting a decent rpm but not the equivalent push as at lower RMP it may have to do as I mentioned with exhaust mixing with water in the tunnel. I hope It is that simple for you.

 

[RobbieO]

Hi , my name is Rickey Thomas . I live in the Colorado Rockies . recently bought a bayliner Reflexx jet boat and its got a mercury 90 3 cylinder engine . runs great on the hose . took it to the water and it just seems to just plow thru the water . 10 mph max . doesnt feel like its getting up on plane at all . very weak . almost as if its not reaching the power band of the engine under a load at all . After replacement of the plugs and wires . making sure everything is firing with good spark . complete carb rebuild new lines gaskets . ect . then filled with High Octane from the co op it still ran like sh*t. took back to repair shop . they yanked the impeller and sure enough its been replaced . impeller looks new . the impeller casing is a little rough but still useable . so here is my problem is . I need impellers for the mercury 90 sport jet in pitches from 17 to 19, or even a recommendation of what to use that would give me that extras RPM or something designed for use in high altitudes .?? Im about 6000 ft above sea level. Rifle Colorado where can I find these impellers? thanks for your time , frustrated in Colorado

Try calling Impros in CA. They are very knowledgeable and can probably help you.

Impros - Impellers Repair and Parts (951) 737-2900

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