450: Rudder Post Bearings

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Hi there.
Has anyone had experience changing out the white plastic rudder post bearings (or shims)? When we bought our boat the previous owner gave me two replacement ones because there is a tiny amount of play in the rudder posts and he got new ones on warranty but hadn't had the boat out of the water to replace them. It seems like a pretty straight forward job but it would be great if someone has first hand experience.
Cheers

[4HMainer]

Mine came out quite easy with a drift bar through the rudder tube. Tapping gently around the bearing. They should be either a press fit in the tube or bedded on something quite solid like epoxy. If they have been glued in with a rubber type sealant adhesive it will be a harder job and you may have to cut the bearing with a hacksaw blade to get it to separate from the adhesive. Make sure the new ones are sized for the correct clearance for the bearing material, all bearing materials absorb moisture and also swell with heat so the clearance on the rudder shaft needs to allow for this. Bearings is my day job.

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Thanks for that 4HMainer.