Owner`s manual

Miscellaneous

Section 6 - Miscellaneous

Replace Mating Gears

It is recommended in situations where a broken crankshaft

gear is replaced as a repair that the camshaft should also

be replaced.

The mating gear will develop a wear pattern, and failure to

change it may cause a repeat failure. This suggestion was

submitted by a wily old distributor that has experienced this

phenomenon many times over his long career. Refer to

Service Bulletin 250 for further information.

Avoid Repeat Failures

Erratic Running & Vapor Lock

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Part No. 25 050 22-S (51 microns) should be used on

engines equipped with a fuel pump.

Part No. 25 050 21-S (75 microns) should be used on

engines using gravity feed.

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debris from the fuel, it is also more restrictive and can

cause erratic running and vapor lock when used on gravity

feed systems. When in doubt, use 25 050 21-S for either

type of system. Refer to PB-253 in “Bulletins, Etc.” for

further information.

25 050 21-S Works for Both

Bearing Concern

There have been some bearings that are used on the KT

and Magnum series engines that have been packaged

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from the aligning tab. The bearings that were found in the

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This will cause problems with the lubrication characteristics

of the bearing and will create a failure. If you have any

of these bearings it can be handled with a new defective

warranty claim. The packing date codes where the bearings

were found are from 746 to 751.

90° is Correct

180°

90°