HD 25 1946-1950 (?) Want to make it run again.

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

OK now you guys are reading my mind... That was going to be one of my next questions, the gas tank. Great suggestions, I really appreciate it! Oh by the way I did get a taste of carb cleaner by accident, not very good, I wouldn't recommend it!

 

[MCM]

Re: HD 25 1946-1950 (?) Want to make it run again.

The taste is nothing compared to what it feels like in the eye's

 

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

Yep it stings allright, I have yet to spray it into my nose or ears but I'm not finished with this motor yet.<br /><br />I got the gasket for the carb made and it turned out great. I've reassembled the carb and am beginning to reassemble the rest of the motor as all repairs have been made. I have to clean out the gas tank yet and I think I am going to try the method described by SoLittle but use marbles since I don't have a handfull of ball bearings on me at the time. Oh I still need to service the water pump too so I think I'll be ordering the impeller/rotor this weekend.

 

[BoatBuoy]

Re: HD 25 1946-1950 (?) Want to make it run again.

nuts and bolts will work too. Someone, somewhere recommended roofing nails.

 

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

I'm soaking and agitating with marbles right now.<br /><br />Question, Does the flywheel need to be pressed or tapped onto the top of the crankshaft or just tightened down with the nut? If I fit everything together and tighten the nut it doesn't thread all the way on, maybe half the threads engage. I have a washer that came off the shaft but cannot remember if it was on top or bottom of the flywheel, any clues? The nut is the one that has a groove for the recoil engaging assembly.<br /><br />Thanks!

 

[MCM]

Re: HD 25 1946-1950 (?) Want to make it run again.

Got a manual that probably covers it but I dont feel like looking it up this late, maybe in the morning if that'll help.

 

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

I would be grateful.

 

[MCM]

Re: HD 25 1946-1950 (?) Want to make it run again.

CalicoKid,<br /><br />The manual shows what appears to be a flanged washer, it shows washer installed with the small "O.D." side down, it shows the washer installed after the flywheel, the torque specs for the nut are 40-45 ft. lbs. My guess from looking at this is that the small side of the washer may insert into the opening on the top of the flywheel. This manual's kind of vague on some things.<br /><br />It does mention however:<br />"It is extremely important that the gas tank be properly lined up with respect to the center of the crankshaft and placed at the correct elevation to prevent mechanism in the starter head from riding against the top of the starter pawl plate on the flywheel"<br /><br />"To check alignment, mount tank in place on the bracket, insert and draw up snugly (not tightly) on the mounting screws. Check position of the starter mount holes in the tank with Dividers (it shows a pic). Holes (in the tank) should be equidistant from the center of the crankshaft. In the event the tank is slightly out of line, tap corresponding side with palm of hand as required to obtain correct position. Tighten mounting screws. Install starter head and check for freedom of action by pulling on starter cord. If there are indications of rubbing remove the tank to build up elevation by placing flat, thin washers as required between the tank and mounting bracket, then proceed as above making certain that the starter head mounting holes in the tank are spaced equal distances from the center of the crankshaft. Finally draw up securely on mounting screws."<br /><br />("An improperly mounted tank will eventually result in damage to starter parts in addtion to being noisy").<br /><br />let me know if you have any ?'s I'll see what I can do

 

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

Very good information, thanks a ton. I just have a flat washer, huh, the one you mention has a 'shoulder'? I'll have a look at that closer today, I do have a copy of the parts manual/diagram thanks to alcan, but it's hard to tell little details like that and it isn't a true exploded assembly diagram.<br /><br />How do I torque the flywheel nut? The only idea I have is a big strap wrench around the flywheel to oppose the torque on the nut. I'm not going to jam the prop and apply that much torque. I'll have to rig up a strap wrench I guess.<br /><br />I'm really glad you posted about aligning the tank and recoil. I would have just bolted it up without considering alignment.<br /><br />The thing that bothers me still is that the flywheel nut only threads halfway on, though it is a deep nut. Nothing looks to be damaged or spalled.<br /><br />Oh BTW, I retested for spark after fixing the stator up by spinning the flywheel and get nice fat blue sparks!

 

[MCM]

Re: HD 25 1946-1950 (?) Want to make it run again.

A strap wrench would probably work just fine, 40-45 ft. lbs. isn't all that much really compared with the 105 on some newer motors. Just make sure nothing is binding, once you start tightening the nut it may suck up a bit more, it is a bit of a pressed fit, hence the need for a puller to remove it. As for the washer, the pic in the manual does appear to have a shoulder on it but a parts diagram would probably have a better description.<br /><br />Anyway keep posting till you here it purrr

 

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

Well it's been cold, cold, cold here so I've not been spending time in the garage with the HD-25. Finally I just brought it into the basement so I could keep going on it. The tank is still soaking and agitating. I bought the original 1947 service manual for all Johnson motors 1947 and older and what a great book! I did not find mention of a washer between the flywheel and starter ratchet in either the service manual or the parts manual and with the flat washer installed the starter ratchet didn't seem to seat properly so I left the flat washer out. I think someone put it in by mistake when the motor was apart before, that or it was laying on my bench before I started on this . <br /><br />What I did find in the manual was a tool for torquing the flywheel nut. I decided to make my own and it worked out perfectly. Ignore my boogery welds, function before fashion!<br /><br />

<br /><br />Forward again!

 

[MCM]

Re: HD 25 1946-1950 (?) Want to make it run again.

Cool, yea all I could give ya was the info out of the Johnson 10th edition sevice manual, might have been the precurser to the Seloc/Clymer as far as some of the info is concerned.

 

[Paul Moir]

Re: HD 25 1946-1950 (?) Want to make it run again.

Your boogery welds look better than my ones.

 

[CalicoKid]

Re: HD 25 1946-1950 (?) Want to make it run again.

OK it's been a while since I've done anything meaningful on this motor but I will get her running and post results, promise!<br /><br />I've been mostly cleaning and shining it up and trying to get that gas tank cleaned out. I put in a bottle of Gumout carb cleaner, a few cups of gas and about thirty marbles and I swish this around every time I go out to the garage. The gas mixture has turned all brown and yucky so I dumped it but the tank is still coated with varnish and gunk. It's better but not at all clean so I put in another bottle of Gumout and some gas and will continue with this. That's all I've got for now other than when I showed off my new tool to Dad he says "Oh a spanner wrench!", here I thought I was so smart.<br /><br />Thanks again to everyone who has helped with this, I'd be lost otherwise. Happy New Year!