HJ212 Full Teardown Tutorial: Main Bearing & Seals Replacement ⚙️ Hamilton 212 Jet Rebuild (Ep.6)

[@billniy1515]

Just wondering is you ever did the follow up to these videos and if you ever did the front part?

[@jetboatmayhem7271]

Yes but had some problem with the footage... I will upload it soon hopefully. Thanks for your comment!

[@tjs_welding_and_fabrication]

Is there a clearance between the impeller and that housing that houses that rear bushing set up. Seems to me should be a spec on that. I know Berkeley and others have a wear ring with specific clearance. Where is the front bearing vid.

[@jetboatmayhem7271]

I'm not sure, great thought though!

[@smwizzz]

Hey, good set of videos. My only comment is this is not a "Full" teardown. You would have had to pull the engine to replace the front seals and bearing assembly as well as service driveline components like a close coupler or u-joints. Good information outside of that. Cheers, Happy Trails!!!

[@ScottPeterson-p7v]

yes was thinking we were doing the bearing

[@jetboatmayhem7271]

Thanks for your feedback and comments!

[@mrriverratjohn]

You have said previously that you have the HJ 212 Manual? Where did you get the 148 foot pounds number for setting your torque wrench? It is supposed to be 200.

[@jetboatmayhem7271]

hey @mrriverratjohn thanks for your comment! This is where I got that number from... page 9-31 in the manual.... 200nm but 148lb ft. "Remove the tailpipe [41], using a suitable spanner to restrain the bearing retaining nut [9], tighten the impeller nut [10] to 200Nm (148lbf ft). Ensure that the mainshaft is supported during torque loading of the impeller nut so that the bearing [7] is not overloaded."

[@mechalchuk]

@@jetboatmayhem7271 this is all just as new to me as it is to you, but I would assume the "Ensure that the mainshaft is supported during torque loading", might mean not pulling that shaft laterally as you were. Perhaps a wooden block standing on the ground or on a jack with a "U" in the top (half-circle) the same diameter of the shaft might help support the shaft and mechanical seal you have just serviced. Then, use the torque wrench in a downward motion only to load the wooden block instead of the shaft. Hopefully what sounded like it broke wasn't the ceramic/carbon disc in the seal stack. :) Hope this all worked out, doesn't look like you've got the entire job done if this is the last video. You are doing the front bearing, correct?

[@joshschacht1180]

@Orangetang that's great suggestion! Yes everything went great, the ceramic didn't break and the repair went great. After doing this once, I would do it differently.

[@mechalchuk]

@@joshschacht1180 oh man, wouldn't we all. Sadly we generally only get a crack at some things once. I read another comment about the entire seal stack coming out through the front, rather than pulling it out from behind? In hindsight is it easier to pull the engine, and then slide then entire shaft through to the front when doing the bearing? Is there a follow up video with the front bearing being done - in the works?

[@ScottPeterson-p7v]

ALWAYS use non metalic anti sieze (marine grade) as any other anti sieze has metal in it this mistake could cost others.

[@jetboatmayhem7271]

Thanks for your comment! Good info!

[@neilpederson5212]

You did that big o ring 100% wrong! You take that o ring and stretch it out,stretch it out lots and for a long time. The you fit it up inside the housing in the groove! The way you’re doing it it will just squeeze out and become useless causing the housing to come loose. And you say that you can’t see it being to important is wrong. That’s very important to be there for performance

[@jetboatmayhem7271]

Thanks for the feedback!