March 13, 2017 at 1:56 am #54220
I pulled it apart, mostly… Weird thing is that the pin you mentioned doesn’t pass through the shaft. In fact, there isn’t even a hole in the shaft for it to pass. I don’t know how it would not spin on the shaft.March 13, 2017 at 2:14 am #54222
That seems very odd. Something has to join the gear to the shaft for the pinion to be able to spin the prop shaft. I would guess Frank has offered good advice above.
Is there a hole in the gear for the pin to pass thru?
OldJohnnyRude on YouTubeMarch 13, 2017 at 2:26 am #54223
Yes. I should have taken a picture of it. But, yes. There is a pin in the holes on both sides of the gear but no hole in the shaft for the pin to pass through. It looks like some kinda friction fit to the shaft. So, the pin is in two pieces.March 13, 2017 at 2:28 am #54224
I will have to go out and look at it again but it wasn’t obvious to me. Of course, I have been told that I am about as bright as a small appliance light bulb.March 13, 2017 at 2:59 am #54230
I’m just wondering if the pin actually passes all the way thru both sides of the gear and the pin. The pin would have to be a press fit in the hole to.prevent it from working out inside the gearcase. If a press fit pin shears off clean in a hole, it is not always immediately apparent where the pin is. Their could be especially true if that gear has been whirling around the shaft for a while. Could it be possible that the surface is just evenly burnished and hiding the remaining segment of the pin that is still stuck in the prop shaft? If there is a hole in thru both sides of the gear I have a tough time thinking they didn’t have the pin pass all the way thru the assembly. See what you can find when you look at it again.
OldJohnnyRude on YouTubeMarch 13, 2017 at 3:25 am #54231
I guess that is possible. I do not see where it has broken off if that is case.
I have already done something very dopey this evening and I suspect this might be dopey 2.0. I am sure it is something simple that I just don’t understand well enough to recognize.March 13, 2017 at 4:28 am #54236
YES – The pin is a single piece. It is the same material as the shaft so when sheared, it is very hard to spot. Worse, when sheared it may distort the hole making it hard to drive out. Best use a brass shear pin when you get it properly back together. . . 😆
US Member - 1 Year
Topics: 43March 13, 2017 at 7:11 am #54238quote Garry in Tampa:
Just so there is no misunderstanding, Garry means the brass shear pin in the prop. The pin in the gear is not supposed to shear, being harder material than the prop pin.March 13, 2017 at 7:25 am #54239
Absolutely brass shear pin in the propeller. If that had been done originally, the drive pin in the gear would have never sheared. . . 🙄
March 13, 2017 at 11:39 am #54242
I actually feel a little better about it now. I expected to be proven a little dopey again but having someone with so much knowledge tell me that it is hard to see, well, that makes me feel a bit better. 😳
This little motor has been a trial. It runs so good now though. I hope I can get the spinny part moving. 😀
How should I go about removing the 3 pieces of pin?March 13, 2017 at 12:34 pm #54245
Glad to see we are on the right track with this one. I’m assuming the pin pieces in the gear are more clearly visible and no too difficult to drive out. The one in the prop shaft has to be found first. Once it is found, I woulove clamp it firmly in a vise with soft jaws so to not damage the outside of the shaft. Once it is secured, I’d use a center punch as near to the center of the pin as.tough can see and give it a whack. Once it starts to move, go to a pin punch a little smaller than the hole and finish driving it out. Finding the pin may be the hardest part.
OldJohnnyRude on YouTubeMarch 13, 2017 at 4:48 pm #54256
The clue is that it was drilled at the same time as the cotter pin hole. So that and the polished part where the gear was should get you close to were the pin was. . . 😉
US Member - 1 Year
Topics: 88March 13, 2017 at 5:19 pm #54264
i have a couple Montgomery Ward (Sea King) motors identical to that one. Strong runners. Garry Spencer once called them the best single-cylinder engine OMC ever produced.March 13, 2017 at 6:01 pm #54266
Thanks Ben and Garry. After only smacking my finger one time I drove the 3 parts of the pin out. A major success. So, now I need a new pin #550669 and a brass shear pin. Anyone know a source for the pin?March 13, 2017 at 6:14 pm #54268
Great news! Glad you got all the pieces out. One thumb-smasher is probably better than I’d have done. 😎
Do you have a micrometer or dial caliper or some way to get an accurate measurement of the pins? Someone may have the real OMC replacement parts, but if.you have a metal supply shop anywhere near you, you should be able to get stainless and brass round stock in the diameters you need and just cut them to length and deburr the ends and put them back in. If you don’t have any place to get the stock, let me know the sizes of the pins and I’ll make you new ones. 😉
OldJohnnyRude on YouTube
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