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Old 05-14-2018, 01:22 PM   #1
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Default Drive shaft 4100 SCA

I have my drive shaft off on my 1999 4100 SCA, was looking for advice as to what I should consider replacing before I have it reinstalled ?
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Old 05-14-2018, 04:21 PM   #2
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Why did you remove the driveshaft?

The cutlass bearing is what I would look at to see if it requires replacement but you need to install the driveshaft to check the play.
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Old 05-14-2018, 04:43 PM   #3
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Thanks, I had a run in with a rock. When the marina took the prop off they claim the shaft is 10th one thousands of an inch off so I took it off to have it verified. I am told anything over 6 onethousands of an inch could be a problem.
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Old 05-14-2018, 09:04 PM   #4
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Cutlass bearing and shaft seals are good to check/replace if shaft has been run while 'bent'.
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1999 Maxum 4100 SCA
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Old 05-15-2018, 12:35 AM   #5
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Did they check to ensure the strut is not bent?
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Old 05-15-2018, 11:40 AM   #6
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thanks all, strut is ok. sounds like cutlass bearing which they did suggest I replace and I will have them check the shaft seals.
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Old 05-15-2018, 12:48 PM   #7
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Moved from "Forum Support | Suggestion Box | News" to "Sport Yachts"

I'd do cutlass bearing and shaft seals anyway unless you know exactly when they were replaced last. They are regular wear items. You're going to need to replace them eventually. It might as well be while you're out and everything is apart anyway.
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Old 05-17-2018, 12:47 AM   #8
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Thanks all. This is very helpful. I am looking for what would be the acceptable amount the shaft can be off. I have been told 4 1000th up to 6 1000 of an inch. As well any suggestions where I might get the pin stripping for the 4100 SRA.
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Old 05-17-2018, 12:51 PM   #9
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I'm not sure about tolerances for the shaft. Vinyl striping can be had at most chandleries. You won't find the exact colors. Pick what you like and go with it. Even people with the same boat will assume it was part of a color scheme option for that year. As long as it's all the same, nobody would notice it's not stock. Fortunately, boats aren't like cars, people don't care if it's 'period correct'.
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Old 05-17-2018, 02:23 PM   #10
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Shop I've always used has a 2 thousands max tolerance anywhere on the shaft, with less than 2 thou, preferably only a few tenths (of a thousandth) between any of the main riding surfaces (coupler, thruhull, cutlass and taper).
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