CNew 404 #26 Posted February 23, 2020 Would it be too risky to re-use this bearing? I don’t plan to run the engine much and since the bearing cage is all confined when installed I’m wondering if it might still work even though it is cracked. What would you guys do? Share this post Link to post Share on other sites
JUST O&R 237 #27 Posted February 23, 2020 I should have one. I think I would change it. Share this post Link to post Share on other sites
Wallfish 698 #28 Posted February 23, 2020 Agree, if it's cracked it should be changed while you have it opened up. Share this post Link to post Share on other sites
CNew 404 #29 Posted February 23, 2020 Ok, that’s what I figured. I’m going’s to check one more source. I have the guts to another engine that might be old enough to have the plastic bearings. I’ll pull the induction unit apart later today to see if it has one in decent shape. Share this post Link to post Share on other sites
factory 487 #30 Posted February 23, 2020 If only one side is damaged then I usually put it in my spares, then later re-use the good half when I find another with the same problem. David 1 JUST O&R reacted to this Share this post Link to post Share on other sites
CNew 404 #31 Posted February 29, 2020 Does anyone by chance have a couple spare, used bearing rollers that go to the bottom (large) end of the connecting rod? I was thinking there may have been one missing when I took this engine apart and now that I’m reassembling it I’m certain once is missing. I think there are supposed to be 14 of these rollers and there are only 13. Share this post Link to post Share on other sites
JUST O&R 237 #32 Posted February 29, 2020 Correct me if I'm wrong but somewhere I read you should take this engines apart over a big pan so you don't loose the parts. 2 Wallfish and factory reacted to this Share this post Link to post Share on other sites
CNew 404 #33 Posted February 29, 2020 Ha, I did I’m always extra careful with these bearings. I actually think someone else was in this engine before and may have lost one. Share this post Link to post Share on other sites
JUST O&R 237 #34 Posted February 29, 2020 We have herd that before. Got the decal today I will throw a few in with the decals and you will have them in a few days Share this post Link to post Share on other sites
CNew 404 #35 Posted February 29, 2020 Ok, cool - the ones you have are used right? No need to break into any NOS sets. Share this post Link to post Share on other sites
JUST O&R 237 #36 Posted February 29, 2020 Im not giving you the good **it. yes there used. Got 2 or 3 in boxes Share this post Link to post Share on other sites
CNew 404 #37 Posted February 29, 2020 Ok, good. I don’t want the good stuff you need to keep that! Share this post Link to post Share on other sites
Wallfish 698 #38 Posted February 29, 2020 You can use one of those magnetic business cards or a fridge type magnet to help keep those rollers under control. A bigger magnet helps with finding them if they do escape Share this post Link to post Share on other sites
CNew 404 #39 Posted February 29, 2020 Yeah, from now on I’m going to add one of those magnetic part pans inside the big pan. Share this post Link to post Share on other sites
JUST O&R 237 #40 Posted February 29, 2020 That would be a good idea Share this post Link to post Share on other sites
factory 487 #41 Posted March 2, 2020 The maintenance manual* does state 14 rollers are used for the con-rod big end and 19 rollers used for the con-rod little end, but I think I should also check some unopened packs of these bearings to confirm this as the later parts list fail to mention any quantities for the rollers. *The manual is supposed to be for the 1HP engine, but I have a picture from one of my restorations showing 16 rollers on the con-rod big end for a 1HP engine. David Share this post Link to post Share on other sites
CNew 404 #42 Posted March 2, 2020 Thanks David- I was starting to get confused as well between the versions. This Type 117 only has room for 14 (at least for the size rollers it came with). Share this post Link to post Share on other sites
JUST O&R 237 #43 Posted March 2, 2020 That's funny I just took one apart and it had 16 bearing I was going to send him a few tomorrow now I'm wondering if the one a have is the correct for him?? Share this post Link to post Share on other sites
CNew 404 #44 Posted March 2, 2020 Hmmmm, very interesting. Let me take another close look at it tonight but I’m almost certain there is no way to get 16 in there. I wonder if they changed the ID of the connecting rod opening or went to slightly smaller OD rollers at some point. This 117 definitely looks like an earlier engine since it has the steel baffles, old style coil, etc. Share this post Link to post Share on other sites
factory 487 #45 Posted March 2, 2020 Those early engines have some smaller sized bearing assemblies, I'm fairly certain the con-rod bearing is too, that's why they give so many parts to change if replacing the plastic caged types. Edit: Later engines have several beefed up bearings on the crankshaft/backshaft. David Share this post Link to post Share on other sites
JUST O&R 237 #46 Posted March 2, 2020 I need to pin this down I don't think we/I have all the books The book I'm looking at is 1961 show 20-5 does not show a replacement shows 9 1962 show a-27-11 and use a-20-5-13-7 show retainer w/rollers the next book is 1965 a-20-5-16-7 show roller asm found this with the bearing a-27-5-13-7 Share this post Link to post Share on other sites
CNew 404 #47 Posted March 2, 2020 Wow- that is a variety of options! Share this post Link to post Share on other sites
JUST O&R 237 #48 Posted March 2, 2020 I'm not good at the paperwork side what size is the bearing and does your rod have the slot in it that would make it simpler for me to find what bearing you need Share this post Link to post Share on other sites
CNew 404 #49 Posted March 2, 2020 I’ll take a look when I get home but I’m pretty sure it had the slot on the bottom of the con rod. Share this post Link to post Share on other sites
factory 487 #50 Posted March 2, 2020 1 hour ago, JUST O&R said: I need to pin this down I don't think we/I have all the books The book I'm looking at is 1961 show 20-5 does not show a replacement shows 9 1962 show a-27-11 and use a-20-5-13-7 show retainer w/rollers the next book is 1965 a-20-5-16-7 show roller asm found this with the bearing a-27-5-13-7 Apart from the roller part numbers everything else is the same as the information I posted on the previous page (posts 19 & 21), the larger diameter bearing assembly was introduced between April & August 1964. Nice to see that page from 1963 confirming the need to change the con-rod to a slotted one when using the all metal con-rod bearing A-20-5-13-7. David Share this post Link to post Share on other sites
