What is this mystery part?

[griz400]

btw ... nice job ... :cheers:

 

[Arkansan]

Griz, we didn't knowingly leave the bumper off the PTO side. We wouldn't do that. We've never pulled either shaft before and can only assume that the Seadoo dealer who installed this engine last year assembled it without a bumper. The impeller end, where we installed a new impeller boot a few weeks back, had a bumper, and it didn't cross my mind that the other would be missing. (What made me suspect it was the sound it made when the shaft clanged back into the PTO as we tried to pull it out. But that was only today. I'm pretty proud of the fact that I diagnosed that just from the sound.) Since we are here now and only have one, we intend to put it in the PTO end because it's just so much easier to pull off the pump to install a new one. (The bilge pump works.)

 

[ialonso]

I'm glad you cleared that up..I read the bumper would be left off at the impeller end.... I would discourage you from not putting one on the PTO end, so good thing you definitely will be putting one there. I have disassembled before to find the impeller bumper totally smashed and destroyed, so I figured I was already running practically without it for who knows how long. This is why I felt OK with my suggestion that you could be OK for the one time without it.

 

[Guest_User]

JMHO, never ever run with missing parts, that`s how more issues start, regardless if it is a shaft bumper or not. with the correct distances between the engine and pump there is already enough travel for the floating drive shaft, WHY create even more travel... those bumpers are there for a reason...

never be in a rush to test, bc that`s what brings most people to the forum with a "crisis" to begin with...

and this year has been a doosey for boat owners with issues on this forum so far...:facepalm:

fix it , fix it right, and cross that off the list and move on...

be safe...:cheers:

 

[Arkansan]

OK, we put everything back together this morning and did take the boat out for a quick spin (without a driveshaft bumper in the impeller end). Both engines started promptly, ran smoothly and accelerated quickly. We kept checking in the compartment for problems on the reinstalled driveshaft, but we didn't see any at all. I'm cautiously optimistic that this repair is a success. We'll pick up another driveshaft bumper from the Seadoo dealer tomorrow and we'll pull the pump and install that before the take the boat out again, probably next Saturday. (We're getting good at that pump thing.) Thank you ALL for your help.

 

[Guest_User]

you can also get those bumpers from SBT. I buy them by the small handful so they are avail when I need them...

OEM neoprene pump seals from Dave at IMPRO`s, or Parker Yamaha, and a few others... also cheap parts to buy and have on hand when needed.

do not keep reusing the same seal over and over again, eventually it will lead to sucking in air...

good luck...

 

[kgray61340]

I am new to all this too and had to take my motor out . I had the same problem as you did getting that piece off of drive shaft . I took two band clamps and attached one end of a ratchet strap to the drive shaft sticking out of boat and the other end attached to my truck and put pressure on it . While it had pressure on it i went back to the other end of shaft and banged on that piece with a rubber mallot and then the shaft went flying out of boat lol sooooo its the O rings that make it so difficult to remove off of driveshaft