QD-11 impeller replacement

[AlfrmVaBeach]

I recently picked up a 1950 Johnson QD-11, 10hp. It didn't run and I have parts on the way, including a new impeller.
Problem is, I haven't picked up a service manual yet and need some help with the impeller replacement. Looks like all I need to do is remove the six screws in the foot (four on the bottom and two in front) and drop the lower unit, or do I also need to remove the shift shaft screw at the base of the foot? Appreciate any help.

 

[jbjennings]

Re: QD-11 impeller replacement

I've not worked on a '51, but I'm pretty sure you just take out the aforementioned bolts and about halfway up the midsection, there should be a little plate about 1.5" square that covers the shift shaft connector. That's how it is on my '53. Disconnect it and you should be in business. IF it doesn't have that shift shaft connector cover on the mid-section, there are several guys on here that will give you better info. I was worried if you took out the screw on the skeg if it has one, that your shifting stirrup would come loose, but not the l.u.
JBJ

 

[AlfrmVaBeach]

Re: QD-11 impeller replacement

Actually, the screw in the lower unit/skeg was out when I got the engine, but after a little fiddling it went back in. Turning the prop by hand, it engages in forward and reversse.

LOL, I just noticed that I'm a cadet. Funny, as I retired after 22 years in the Navy as a Master Chief, guess I'm starting over!

 

[jbjennings]

Re: QD-11 impeller replacement

I don't understand--- the screw was out? Where did you find it? I'm worried..
All the l.u. oil is gone so you'll have to replace it at the very least if it was out. Did you have the mid-section shift connector cover? You've got me curious now. Sorry you got busted down!
JBJ

 

[AlfrmVaBeach]

Re: QD-11 impeller replacement

The original owner had removed the screw, thinking it would drain the lower unit. He wasn't able to get it back in, but kept it and gave it to me. No mid-scetion cover to remove, I see one screw at the bottom (not couting the drain and fill screws) and one about halfway up the leg.
I drained the lower unit (it looked like crude oil) and refilled with lower unit lube. Now to replace the impeller and one coil, new points and plugs and try to fire it up!

 

[jbjennings]

Re: QD-11 impeller replacement

WHew! you had me worried there. It looking like crude oil is a good thing--just means it hasn't been changed in a while..If it was milky or had water in it, you'd have to change the l.u. seals (what a pain).
good luck,
JBJ

 

[wbeaton]

Re: QD-11 impeller replacement

That lower unit is a serious pain to drop. Its different than the QD-14. There is a cover plate at the base of the leg you have to remove. I think you may also have to remove the entire rear cover, but its been a long time since I took one apart. Either way you will have to unscrew the shift shaft from the upper and lower ends. I can email you a service manual that covers your lower unit. PM me your email address and I'll send tonight.

 

[jbjennings]

Re: QD-11 impeller replacement

Oops, no midsection cover? Well, this looks like a question for WBeaton, F-R or Samott--or many others. Don't worry, I guarantee someone will post the exact answer very soon.
Sorry I couldn't help on this one,
JBJ

Looks like WBeaton typed in the answer faster than I could think!

 

[wbeaton]

Re: QD-11 impeller replacement

Those coils are obsolete. so are the condensers and points. Do you have good replacements?

The cover you must remove is the one held on by one or two screws and it wraps around the leg.

 

[AlfrmVaBeach]

Re: QD-11 impeller replacement

Hope the parts aren't obsolete, I ordered coil # 18-5181, point set # 18-5006, the site says they're supposed to fit the QD-11. Should be here in a few days, I'll keep my fingers crossed.
WBeaton, I PM'd my email address.


What a great forum, appreciate the help!

 

[F_R]

Re: QD-11 impeller replacement

You are in for some real education. Those were good motors, but have some serious issues when it comes to repairing them. First, the coils are highly obsolete and have been for about 40 years. Not only that, they are almost always bad. You will have to jury-rig something else in their place. The breaker points are semi-obsolete, available but very $pricey. The carburetor is obsolete, and you may find yourself making parts for that too.

As for getting at the water pump, remove the rear cover (3 screws) just above the gearcase. As I remember, you still have to remove the rear cover above that and disconnect the shift rod at the shift lever, then unscrew it from the yoke at the bottom (behind the first cover). There were variations on this over the years, so I could be off a notch.

Enjoy.

 

[wbeaton]

Re: QD-11 impeller replacement

Hope the parts aren't obsolete, I ordered coil # 18-5181, point set # 18-5006

Those won't fit. The QD-10 & 11 don't have the universal magneto. That came out in 1952-53. You can use the condensers if you modify the armature plate a little (no big deal). The points you have are the push rod style so the ones you ordered won't work. You can use the new coils if you knock them off the their laminations and mount them on the old coils laminations, but the plug wires will be in a different spot so you may have to modify the armature for that too.

However, you can take the universal mag off a newer motor and mount it on yours. I'm not sure if there is any modification that needs to be completed if you go that route.

 

[jay_merrill]

Re: QD-11 impeller replacement

I don't know if this product will mount to your armature plate but if it is close to the later model motors, it probably will ...

NOVA II Electronic Transistorized Ignition Module
(scroll down on the page until you see them)

"http://hometown.aol.com/pullingtractor/a1elect.htm"

These units replace standard points and condensors and generally work in any motor with a single magnet flywheel. While it sounds like you are going to have to work around the coil problem, these units would at least make the rest of the ignition issue a lot more simple.

Standard Disclaimer: I have no ownership or financial interest in this company, nor do play such a person on TV. My middle name is not "Ohm" and I don't have a clue why these things work, they just do. Sometimes blind faith is a good thing!

 

[Lodgepole]

Re: QD-11 impeller replacement

The screw you mentioned that was out in the skeg area is likely a pivot pin for the shift yoke inside the gear case. It should have a long non threaded section that extends past the threads. The yoke moves the gears foreward and backwards for foreward and reverse. The pin must go through the hole in the yoke. Try turning motor over by hand and be sure it is shifting before you start it. Anytime you get a motor with unknown history, it as always good to replace all gearcase seals including the shift shaft seal. You have mentioned the impeller also which is a must.

 

[wbeaton]

Re: QD-11 impeller replacement

FR, that is the procedure I followed when I serviced mine. What a serious pain.