1999 Johnson 200hp, Ocean Runner Lower Unit Hub

frustratedboater

frustratedboater

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I am replacing my prop shaft (bent) and upon re-install, my plates that help secure the hub in place are not sitting flush. I have pulled everything apart and reinstalled with the same results. When I snug down the bolts to secure the hub the prop shaft becomes tight and will not turn. I am racking my brain on this and can't seem to figure what is not correct.
I have followed the lower gearcase break down (parts list attached) and have every thrust washer, bearing and washer in the correct place. Not understanding why the hub will not seat all the way with little play. The forward pump is all the way in but when I tap in the hub I can hear that it is all the way in, but the tightening plates are not sitting flat. I'm at a loss.
1st pic- bolt plates not laying flat. 2nd pic- hub not seating all the way in
 

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frustratedboater

frustratedboater

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Messages
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Just to clarify, the hub seems like it needs to go in 1/16", however it is installed all the way. Any advice? I would appreciate it.
 
dingbat

dingbat

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frustratedboater said:
I am replacing my prop shaft (bent) and upon re-install, my plates that help secure the hub in place are not sitting flush. I have pulled everything apart and reinstalled with the same results. When I snug down the bolts to secure the hub the prop shaft becomes tight and will not turn. I am racking my brain on this and can't seem to figure what is not correct.
I have followed the lower gearcase break down (parts list attached) and have every thrust washer, bearing and washer in the correct place. Not understanding why the hub will not seat all the way with little play. The forward pump is all the way in but when I tap in the hub I can hear that it is all the way in, but the tightening plates are not sitting flat. I'm at a loss.
1st pic- bolt plates not laying flat. 2nd pic- hub not seating all the way in
Click to expand...
You’ve changed shafts.

Did you following the shimming procedure in the manual?
 
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racerone

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Explain ---" forward pump "----On this unit.----Part # of the gears you installed ?
 
Last edited:
frustratedboater

frustratedboater

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dingbat said:
You’ve changed shafts.

Did you following the shimming procedure in the manual?
Click to expand...
Thanks for the reply..
436740 OMC shaft was replaced. There are two thrust washers #30, and #44 on the prop shaft. I had spec'ed a .010 shim for the drive shaft showing #43 under the bearing housing.
(Forward Pump) "Bearing Housing.. forward gear assy."
 
frustratedboater

frustratedboater

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racerone said:
Explain ---" forward pump "----On this unit.----Part # of the gears you installed ?
Click to expand...
No gears were replaced, but just the prop shaft. Everything is the same, the only replacement is the shim and the two o-rings on the hub.
If I install just the gear assy leaving the shaft and pinion out, same issue.
 
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racerone

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Most OMC parts have a 6 digit part identification # on them.=====Look for it on the 2 bearing housings.
 
frustratedboater

frustratedboater

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The only thing that changed is the prop shaft. Everything else was original. Not sure why it whole assembly doesn't just slide in all the way and fit like it did.
I cross referenced all the thrust washers and it all is in its' place. I'm gonna pull everything out again and double check/measure the shaft. I even assembled everything with the hinderance of the pinion or drive shaft. This should give me this much of a problem.
 
frustratedboater

frustratedboater

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Well, did a side-by-side and replacement shaft was 1.74mm longer from the dog splines to the end of the forward gear on the shaft. AND the numbers did not match. Needed 436740, was given 435022- what the heck is that to?? 250hp?
 
dingbat

dingbat

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frustratedboater said:
The only thing that changed is the prop shaft. Everything else was original. Not sure why it whole assembly doesn't just slide in all the way and fit like it did.
I cross referenced all the thrust washers and it all is in its' place. I'm gonna pull everything out again and double check/measure the shaft. I even assembled everything with the hinderance of the pinion or drive shaft. This should give me this much of a problem.
Click to expand...
According to the manual, when installing a new thrust bearing, or washer, bearing housing, pinion, or drive shaft, it is necessary to properly shim the assembly to restore factory clearance. Gives very specific instructions on how to measure and shim the length of the assembly.

Having said that, my shaft (0435022) has been superseded by a shaft that doesn’t use one of the shims in the assembly

 
frustratedboater

frustratedboater

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Johnson J225PXEEN
I had looked it up and looks like I was handed a Driveshaft to a Cobra Drive, or I/O if I researched correctly..
 
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