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#1
10-23-2007, 01:48 AM
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Re-bushing Zenith throttle linkage
I am looking at the McMaster Carr website and these sleeve bearings should do the trick. The measurements are 0.325"+ for the shaft & 0.393" for the linkage arm.
Material Bronze Bronze Type Steel-Backed PTFE-Coated Bronze Type Sleeve Bearings System of Measurement: Metric For Shaft Diameter 8 mm Outside Diameter 10 mm I e-mailed them to see if I can purchase retail. Anyone know if this is a Wholesale only website?
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old 
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#3
10-23-2007, 05:46 PM
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Quote:
Back before the internet was all powerfull, they sold only on invoice, so a credit application and check was neccessary. Now, all you need is a CC. I've been dealing with them for over 25 years, the prices are not the lowest, but they have just about everything.
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#4
10-23-2007, 10:18 PM
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BellCrank is correct
The 8mm & 10mm size is very close. Just a little emery cloth work.
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old
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#5
10-24-2007, 12:24 AM
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Another good website
Reid Supply Company
https://reidecom.reidtool.com/xephr/qbe/HOMEPAGE These guys have a lot of interesting things (including the metric Sleeve Bearings)
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old
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#6
10-24-2007, 04:47 PM
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Munich, the only problem that I can foresee is that brass post may have worn. This was a problem on my INATS. I was lucky and found the Mercedes repair kit for the front carb which had the replacement brass post.
I would order a smaller inner diameter bushing and turn the post on a lathe (if needed from wear) Just a thought... Last edited by Blue 72 250; 10-25-2007 at 10:15 PM.
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#7
10-25-2007, 08:57 PM
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Yes, the brass shaft is 'dish-shaped' slightly, and, it will need to be a smaller diameter to accomadate the 8mm ID (a slip fit).
I have some spare shafts if I mess up.
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old
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#8
11-02-2007, 12:35 AM
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Success
The 10 mm OD was a firm fit inside the bellcrank.
I chucked the shaft in a drill press, and while it turned, and used a file to slowly remove ~0.02" from the shaft diameter. Checking diameter as I filed, I cut ~0.004" undersize for a slip fit. Works like a charm. BTW, I cut a spare bolt so it was head-less, half-threaded a nut on it, then threaded the throttle shaft to the assembly. (protects the throttle shaft threads)
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old
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#9
11-04-2007, 12:44 PM
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Thanks for the update. I hope you see an improvement in the INAT's. I am going to do my "fall tweaking" this weekend so the chokes are a little more tight.
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#11
11-05-2007, 09:04 PM
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I actually used 4 bushings, 2 inside the front carb bellcrank & 2 inside the rear carb bellcrank. Each bushing was 8mm ID, 10mm OD and 8mm in length.
$0.42 each at Reid Supply company. http://www.reidsupply.com/results.aspx?N=1004237
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old
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#12
07-24-2019, 12:53 PM
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Quote:
Hello, this post is so old so dont work the link. Can anyone help me and tell me if these bushing measures are for the throttle butterfly shaft (zenith INAT 35/40)?
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