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Old 11-03-2018, 01:08 PM
t1704 t1704 is offline
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Default Bronze bushings or standard washers for jackshaft spacers

Hey folks,

I'm reassembling a jackshaft and cannot seem to find the specific spacers (5/8 ID and multiple widths) as indicated by the manual, so I figured I would use washers to space the sprocket out appropriately. My question, assuming this is an acceptable plan is whether to use standard metal washers or bronze bushing/washer as pictured.

Thanks for the help.
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Old 11-03-2018, 01:11 PM
mckutzy mckutzy is offline
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Either will do, a shaft collar might be a bit better, as it has an ability to keep the sprocket in place...
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Old 11-03-2018, 05:21 PM
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make sure the washer ONLY touches the inner ebaring races!

bronze work of course, but make absolutely no sense,
since there is no relative movement or rotation on the shim/washer/bushing

but they don't harm either.. so if you only have some of those, they'll work

Locking collars are great, but again, with washers to make sure only the inner bearing races are in touch with anything on the shaft itself

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Old 11-03-2018, 09:06 PM
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You can get something called machine spacers or machine bushings that are basically narrow wall washers with a true ID, not a nominal ID, in varying thicknesses.

Basically just like your bronze bushings there, but steel.
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Old 11-04-2018, 09:08 AM
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Default Spacers and cracked carb mounting plate

Thanks guys. The only thin walled washers I could find at the hardware store were those. The bronze ones are a much better true 5/8 ID fit as they barely make it over the threads of the shaft, unlike the others that are a bit sloppy. As far as touching the inner race, it would appear as if that's the only contact being made, but those bearings don't have much of a lip so it is possible that the washer could potentially touch the dust covers on the washer at times. I'll go take another look, then maybe head to AgriSupply tomorrow and look for locking collars or machine bushings.

Here's another question - I'm replacing my carb and adding a stage one to the motor. Pulled the old carb and the black mounting plate as seen below is cracked. Doesn't seem to be cracked all the way through, but it's definitely cracked. My question is do I need this, or can I just secure the carb directly to the motor with the gaskets? If I do need it, do you think the crack will be a problem, or will the gasket take care of this. My old carb was seeping gas; the o-ring on the bowl was partially missing, so I assumed that was the problem, but now think this mounting plate could have also been a contributor.

I know these are a lot of newbie questions and I'm sure I'm overthinking a bunch of this, but with the expertise on this site, doesn't make sense not to ask - even if it shows my lack of experience.

Appreciate the help guys.
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Old 11-05-2018, 07:00 AM
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Default Jackshaft Spacers

Here's what I ended up using, so I think this will work. The first washer is one that I could find from GoPowerSports and rides nicely against the inner race of the bearing. The rest are just spacers. Thanks for your help and feedback.
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Old 11-05-2018, 07:56 AM
mckutzy mckutzy is offline
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That's an insulator plate... It's needed for this carb. They can be sought cheaply on the amazon... But you might be able to get on from a lawnmower/rental shop.. They might have one for cheap/free if you ask nicely if they're not busy..
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Old 11-05-2018, 10:08 AM
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Thank you mckutzy - I have it put back together; going to see if it works with new gaskets. If not, I'll pick one up and change it out.
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