vandenburgh
Contributing Member
I am attempting to reseal leaky lower unit on my old 40HP johnson electric shift (novice first timer). leak appears to be between upper and lower gearcase and likely other locations as gearcase oil becomes milky after about 30min on the water and then motor no longer shifts into forward (I am assuming because viscosity is fouled up at this point, but perhaps there are other issues too).
I have the lower and upper gearcase off along with the 6 inch extension (the piece that makes this a long shaft model). I think I have identified all the required seals/orings required to complete the job, but not sure where to find a couple of parts and was hoping someone has experience with this range of motor (60's electric shift).
Specifically I am looking for 2 o-rings that go on either side of the 'adaptor' found inside of the 6 inch extension (the adaptor is part #83 on the parts schematic for this motor). The schematic does not show the o-rings, but they indeed are on my motor and seem required (my old ones look scored and a bit hard). I am calling them o-rings, but they are actually flat on top and bottom. They are about 1.25 inches ID and 1.5 inches outside diameter and about 1/8 inch thick.
Any advice on specific part # to order would be appreciated (either OEM or Sierra). I have several other questions as I attack the upper gearcase, so establishing a dialogue if anyone has experience with these motors would be greatly appreciated.
Thanks.
I have the lower and upper gearcase off along with the 6 inch extension (the piece that makes this a long shaft model). I think I have identified all the required seals/orings required to complete the job, but not sure where to find a couple of parts and was hoping someone has experience with this range of motor (60's electric shift).
Specifically I am looking for 2 o-rings that go on either side of the 'adaptor' found inside of the 6 inch extension (the adaptor is part #83 on the parts schematic for this motor). The schematic does not show the o-rings, but they indeed are on my motor and seem required (my old ones look scored and a bit hard). I am calling them o-rings, but they are actually flat on top and bottom. They are about 1.25 inches ID and 1.5 inches outside diameter and about 1/8 inch thick.
Any advice on specific part # to order would be appreciated (either OEM or Sierra). I have several other questions as I attack the upper gearcase, so establishing a dialogue if anyone has experience with these motors would be greatly appreciated.
Thanks.