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Thanks for the video. Unless you speak/read Thai it's a bit hard to understand but basically what he's doing is pulling the pinion gear off the rotor shaft, knocking the shaft out of the housing, then pulling the shaft bearing and shaft seal. The original bearing is a standard size (26mm OD x 8mm x 10mm ID) but not a standard design. Ditto for the shaft seal (20mm OD x 7mm x 10mm ID) which is a unique design that no one sells as an individual part. A commonly available shaft seal and bearing will fit but may not perform exactly as the original as the original bearing is open (no seal) on the engine side and receives it's lubrication from splash oil getting into the housing via the two slit openings. The original shaft seal is a unique design, taller than other seals of the same OD, but also with triple sealing lips. The OP also covered the pick-up coils with epoxy as the original plastic covers break with age.
Any oil leaking internally will drip out of the weep hole, and cleaning that area under the cap with a electronics compatible solvent (CRC electronics cleaner, never Carb cleaner) now and then will help.
Link to previous discussion:
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Distributor oil leak
My distributor is leaking oil from the shaft seal. When the cap is pulled off the distributor has oil inside. This oil is leaking from around the shaft to which the rotor is affixed. Is it urgent to change the distributor? Can it just wait? Is there any risk of fire with it being in such close...forum.ih8mud.com
My English and mechanic knowledge is not much strong but I'm trying to understand your advice. I am very appreciate for your help and waiting for your advice . thank you.Thanks for the video. Unless you speak/read Thai it's a bit hard to understand but basically what he's doing is pulling the pinion gear off the rotor shaft, knocking the shaft out of the housing, then pulling the shaft bearing and shaft seal. The original bearing is a standard size (26mm OD x 8mm x 10mm ID) but not a standard design. Ditto for the shaft seal (20mm OD x 7mm x 10mm ID) which is a unique design that no one sells as an individual part. A commonly available shaft seal and bearing will fit but may not perform exactly as the original as the original bearing is open (no seal) on the engine side and receives it's lubrication from splash oil getting into the housing via the two slit openings. The original shaft seal is a unique design, taller than other seals of the same OD, but also with triple sealing lips. The OP also covered the pick-up coils with epoxy as the original plastic covers break with age.
Any oil leaking internally will drip out of the weep hole, and cleaning that area under the cap with a electronics compatible solvent (CRC electronics cleaner, never Carb cleaner) now and then will help.
Link to previous discussion:
![]()
Distributor oil leak
My distributor is leaking oil from the shaft seal. When the cap is pulled off the distributor has oil inside. This oil is leaking from around the shaft to which the rotor is affixed. Is it urgent to change the distributor? Can it just wait? Is there any risk of fire with it being in such close...forum.ih8mud.com