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-   -   Blew up XR ITS Upper (https://www.offshoreonly.com/forums/drives-lower-units/356401-blew-up-xr-its-upper.html)

zx1421 09-09-2018 02:16 PM


Originally Posted by AllDodge (Post 4648263)
No it can be done, by rotating the lower 10 times, then divide by 10. Your rotating 10X because it becomes more obvious, then working with small degrees

As example
Upper gears 19/16 = 1.187
Lower gears 15/19 = 0.789

Calculation 1.187/0.789 = 1.504 ratio

So rotate and count
1.26 lower 17/18 = 0.944 10X = 9.44
1.35 lower 15/17 = 0.882 10X = 8.82
1.50 lower 15/19 = 0.789 10X = 7.89

Thank You! That worked, I rotated the vertical shaft 10 times, prop shaft turned a bit more than 8 3/4, I’ll call that 8.82. So it is what it was a few years back when I checked it all together, 1.35. ( I just got new lower gears 13 hours ago) thought maybe someone put the wrong ones in.

zx1421 09-10-2018 08:17 PM

https://cimg3.ibsrv.net/gimg/www.off...b08e10d94.jpeg

Originally Posted by ACrooks69 (Post 4648120)
:eek:You're going to need a bigger slide hammer! Those splines are impressive.

Bigger slide hammer you say

zx1421 09-10-2018 08:38 PM


35 fountain 09-10-2018 09:16 PM

Damn, that sucks but at least you got it out and you know what happened. Wow. Glad you got it resolved.

Dave M 09-11-2018 06:04 AM

That sucks. I broke a tooth off the gear set and locked up the drive. Where your splines are twisted on the short shaft, mine sheared of clean off. It didn't damage the case though. I have an extra long shaft if you need one. Man, I don't miss I/O's.

ACrooks69 09-11-2018 06:59 AM

Wow, you twisted on both ends. I forget, was the motor free to spin or locked up?

zx1421 09-11-2018 07:06 AM


Originally Posted by ACrooks69 (Post 4648573)
Wow, you twisted on both ends. I forget, was the motor free to spin or locked up?

motor is fine, I hope, I should r&r the coupler though

ACrooks69 09-11-2018 07:11 AM

Sorry, I meant could you turn the engine over when the shaft was still in?

zx1421 09-11-2018 07:15 AM


Originally Posted by ACrooks69 (Post 4648578)
Sorry, I meant could you turn the engine over when the shaft was still in?

yes, I turned the motor off to stop the grinding in the drive

F-2 Speedy 09-11-2018 07:34 AM

did you impact some thing


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