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putting shims in your lower unit?? #11123142 09/23/15 08:42 PM
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Skeeter man ZX225 Offline OP
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How do you know when you need to shim your lower unit as you are rebuilding it with a new shaft?

Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11124293 09/24/15 01:11 PM
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Tommy Yetts Offline
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You should always check the shimming, however most of the time when you are just replacing a propshaft or driveshaft it doesn't change the shimming. However in some of the late model Mercury motors changing a propshaft does require shimming.

Last edited by Tommy Yetts; 09/24/15 01:12 PM.

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Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11124450 09/24/15 02:15 PM
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gary purdy Offline
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You need a good factory service manual.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11125430 09/24/15 09:33 PM
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Skeeter man ZX225 Offline OP
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Mr. Purdy where can I find one of the good factory service manuals for a 2007 hpdi 225

Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11125440 09/24/15 09:35 PM
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Skeeter man ZX225 Offline OP
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Tommy? what am I looking for when checking the shimming? back a forth play? I replaced the prop shaft 5 years back in the 150 hp Yamaha that I had and it was still running when I sold it, but I did nothing with the shims and it had a bit of back and forth play. Plus thank you for your input

Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11125953 09/25/15 01:42 AM
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gary purdy Offline
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Through a Yamaha dealer.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11126554 09/25/15 01:00 PM
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Skeeter man ZX225 Offline OP
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Thank you

Re: putting shims in your lower unit?? [Re: Skeeter man ZX225] #11126622 09/25/15 01:36 PM
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Tommy Yetts Offline
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Skeeter, Like I said when you replace the propshaft in your motor you did not need to check the shimming. The shimming process makes sure your gears mesh properly at the right depth. You will always have a little end play in the propshaft.


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