Shimming Intermediate to lower unit

[Indy1K]

I just bought 2 good used intermediate and lower units. In checking my readings for the shimming of the lower to intermediate units, I am coming up with a pre-load of -0.43mm My A reading is 8.13mm and my B reading is 7.70mm. With B-A I have too much preload.
No I will say that I do not have the preload tool to mount on the Lower unit to hold the Bearing race in place. Is this necessary to get the correct measurements for shimming? Dont want to do this wrong.

Thanks,

Kevin

 

[Fun Times]

Hi there, you forgot to mention what drive and year model you're working on.

Also please see your private messages which can be found in the upper right hand side of the page with a red highlighted number...Thanks.

 

[Indy1K]

Hi there,
yes, I realized that after the post.
The boat is a 1986 SunRunner. It has twin AQ260/290A units in it. The engines were rebuilt last year and run well. The drives are badly corroded from being left in the salt water for years. That is why I bought to two good used replacement units. I will get the serial numbers this weekend.

Thanks,

Kevin

 

[Indy1K]

Well, I pulled the drives off this week. What a mess! there is sooo much corrosion on the intermediate and lower units that has just been painted and re-painted over for years. Loaded with barnacles and muscles, I am surprised anything worked. The port drive will not go into gear because of all the corrosion and broken springs on the reversing lock. I have posted a message to Ricardo on the other site, but he has not responded yet.
I plan on rebuilding the rams, replacing the control cables, replacing both bellows and water hose after I sandblast, re-prime and paint the transom housings.
Then mount the new outdrive units

 

[HorizonblueDK]

I would say yes, you need to have a tool for holding the bearing race in place. I have made my own tool. It only holds the race in two spots(three would probably be better). I gently tighten the adjusting screws and tap the race with a small hammer, also gently, while rotating the shaft. Then take several measurements, to make sure it's properly seated.