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Old 08-01-2018 | 11:53 PM
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Which way is the propshaft spinning for the drive that makes the noise ? Most fountains twin spin in but not sure about yours ?
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Old 08-02-2018 | 06:31 AM
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Originally Posted by BUP
Which way is the propshaft spinning for the drive that makes the noise ? Most fountains twin spin in but not sure about yours ?
clockwise spins in
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Old 08-02-2018 | 06:42 AM
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Out of curiosity, with both drives in gear (motors off), have you grabbed each prop and compared the backlash between both drives? Might have to jump the nuetral safety switch to get back into nuetral.

Has the prop shaft carrier been removed and the nit or bolt on vertices shaft verified to still be intact? I had a nut come loose that allowed the pinion gear to drop down onto the driven gears. Still ran though
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Old 08-02-2018 | 09:57 AM
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At this point and if it were mine, I’d drain down the fluid, pull the top and back caps off, remove the shift shaft, cam and detent ball and spring, put the shift shaft back in but leave the fork out, refill and run it, it’s going to be in gear since there’s no shift fork to hold the cone, but if the noise goes away, you know it involves the shift fork/cam, cone or bump rings on the gears...you’re not out anything, just time and lube
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Old 08-02-2018 | 01:58 PM
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Originally Posted by JaayTeee
At this point and if it were mine, I’d drain down the fluid, pull the top and back caps off, remove the shift shaft, cam and detent ball and spring, put the shift shaft back in but leave the fork out, refill and run it, it’s going to be in gear since there’s no shift fork to hold the cone, but if the noise goes away, you know it involves the shift fork/cam, cone or bump rings on the gears...you’re not out anything, just time and lube
Great idea!
thank you
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Old 08-09-2018 | 06:30 AM
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Originally Posted by Sydwayz
I am going to suggest getting two 10' lengths of plastic downspout corrugated pipe (solid kind, not holes), and tape it up to your exhaust to help isolate the exhast/motor noise away from the drive when you are troubleshooting and filming.

I don't doubt you that you hear something in the drive. I can hear something in the video, but I can't discern any details about it.
Delivered yesterday...10" x 25 ft aluminum flex duct un-insulated. I with cut it in half and 12ft per length and attached it to my exhaust...Thanks for the idea! Then i will remove the shift fork as well. Pics and videos to follow. Thanks

Last edited by 35fountain; 08-09-2018 at 06:48 AM.
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Old 08-10-2018 | 09:42 PM
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.I couldn't pass up this day without taking a ride before the rainy forecast weekend ahead...As i was rinsing the engine @750 rpm when i got back .check this out.
This is the loudest knocking yet!

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Old 08-11-2018 | 01:41 AM
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Although I'm not a drive mechanic I have set ring and pinions in cars . It appears to me by looking at your vid with the top cap removed that there is excessive play between the gears maybe caused by too much preload on the drive gear ? (not sure how the distance between teeth are set on a B1) That would definitely cause a rattle .

Last edited by the deep; 08-11-2018 at 01:50 AM.
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Old 08-11-2018 | 07:36 AM
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Originally Posted by the deep
Although I'm not a drive mechanic I have set ring and pinions in cars . It appears to me by looking at your vid with the top cap removed that there is excessive play between the gears maybe caused by too much preload on the drive gear ? (not sure how the distance between teeth are set on a B1) That would definitely cause a rattle . https://youtu.be/lPr4UQPMBXg
I believe the pre-load was set for 8 in lbs.. If it is too tight what could cause the knock sound?
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Old 08-11-2018 | 07:50 AM
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Originally Posted by the deep
Although I'm not a drive mechanic I have set ring and pinions in cars . It appears to me by looking at your vid with the top cap removed that there is excessive play between the gears maybe caused by too much preload on the drive gear ? (not sure how the distance between teeth are set on a B1) That would definitely cause a rattle . https://youtu.be/lPr4UQPMBXg
with the top cap off, 2 things happen, the clutch shaft isn’t held in place, the internal bearing in the driven gears race is in the top cap ( not there to position the gear) and the garter springs ( between the shift cone and gears) will push the gear stack apart... there is a process for checking backlash, it involves holding the driven gear in place and checking the movement at the pinion, a few special tools are required to do this though

Last edited by JaayTeee; 08-11-2018 at 09:20 AM.
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