D-600 rebuild ?'s

[Gene123]

I picked up this '78 R7266 today. Cleaned the carb, and put a new float spring, and fuel bowl on. Then I cleaned the carbon out of the muffler. Exhaust ports were clean. Started with 2 pulls.
A friend of mine's boss has a similar 19" model that is in very, very good condition. He said they couldn't get it to start. Hopefully they'll be willing to sell it, and I'll be sure to post some photos if I end up with it.

Congratulations on the '78 R7266. It looks like one of the good, old fashioned simple ones. How did you clean carbon out of the muffler?

The manual you recommended (D400 & D600) arrived a couple of hours ago. Thanks for letting me know about it.

Fifteen miles away, in what used to be a small country town, I found a small engine shop now run by the third generation of the same family. They still have some old oem Lawn Boy parts in stock. If you don't find a new piston for the D600, let me know. I'll see if they've got one.

..... Hope you get the other LB from your friend's boss. I'm watching Craigslist and eBay hoping to get lucky. ... Slim pickin's for old LB's down here in the Dallas area.

 

[Fireman 123]

Thanks! Your book has a section that explains how to de-carbon the exhaust. If I were you, I'd buy up all you could of the nos parts. Even if you don't need them, if you plan on tinkering with old Lawn Boys, you will at some point haha I have an old dealer near me that I have bought a ton of stuff from, and I've had good luck selling some things I didn't need on eBay. Thanks for keeping an eye out for the piston. I'm seriously thinking of rebuilding the one I got today instead. It seems to run fine, but I can hear the slack in the engine, and the compression is decent at best. The piston should be good enough to reuse. I learned that the bronze lower bushing has to be machined out to accept a F engine needle bearing as a replacement. This should make the engine a lot smoother.

 

[Gene123]

Thanks! Your book has a section that explains how to de-carbon the exhaust. If I were you, I'd buy up all you could of the nos parts. Even if you don't need them, if you plan on tinkering with old Lawn Boys, you will at some point haha I have an old dealer near me that I have bought a ton of stuff from, and I've had good luck selling some things I didn't need on eBay. Thanks for keeping an eye out for the piston. I'm seriously thinking of rebuilding the one I got today instead. It seems to run fine, but I can hear the slack in the engine, and the compression is decent at best. The piston should be good enough to reuse. I learned that the bronze lower bushing has to be machined out to accept a F engine needle bearing as a replacement. This should make the engine a lot smoother.

Regarding the bronze lower bushing, have you gotten a price for having it machined out to accept an F engine needle bearing?

 

[Fireman 123]

Regarding the bronze lower bushing, have you gotten a price for having it machined out to accept an F engine needle bearing?

Yes it's at a machine shop right now waiting to be done. It almost broke my heart when they told me how much they "believe" it'll cost. Here's a link to the process;http://www.mytractorforum.com/showthread.php?t=112798

 

[Gene123]

Yes it's at a machine shop right now waiting to be done. It almost broke my heart when they told me how much they "believe" it'll cost. Here's a link to the process;"F" bearing in a "D" crankcase - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information

Would you mind sharing with us how much they "believed" it would cost? Thanks for the mytractorforum link showing the process. It was great! That lucky fellow must have a nice shop with plenty of tools. He obviously was rather good at what he was doing.

Hey, I got my old faithful D-600 running again today. :biggrin: The engine is from a 19" pusher model 5241 (1973). The original deck went bad, so I put the D-600 on a model 5247 deck (1980). I've been using that engine since 1976. :thumbsup: I installed a new coil, and it started on the second pull. The coil was a genuine LB coil (now Toro). It was about $50 from Mowtown. It could use new crankcase seals. Have you ever put those in a D-600?

 

[Fireman 123]

Would you mind sharing with us how much they "believed" it would cost? Thanks for the mytractorforum link showing the process. It was great! That lucky fellow must have a nice shop with plenty of tools. He obviously was rather good at what he was doing.

Hey, I got my old faithful D-600 running again today. :biggrin: The engine is from a 19" pusher model 5241 (1973). The original deck went bad, so I put the D-600 on a model 5247 deck (1980). I've been using that engine since 1976. :thumbsup: I installed a new coil, and it started on the second pull. The coil was a genuine LB coil (now Toro). It was about $50 from Mowtown. It could use new crankcase seals. Have you ever put those in a D-600?

Sure, they quoted me $50 to do the machining (an hour's labor). I have the bearing on order. As far as seals go, I will be replacing them as I put the engine back together. I have read that you can make a seal driver out of PVC pipe so you don't have to completely remove the engine, just blade. Use a long pick to remove the old seals. You will need to remove the flywheel on the top side naturally.

 

[Gene123]

Sure, they quoted me $50 to do the machining (an hour's labor). I have the bearing on order. As far as seals go, I will be replacing them as I put the engine back together. I have read that you can make a seal driver out of PVC pipe so you don't have to completely remove the engine, just blade. Use a long pick to remove the old seals. You will need to remove the flywheel on the top side naturally.

Thanks. Will you be posting photos of your project? Particularly, the seals are important. However, many of us don't know what they look like or how to install them.

 

[Phototone]

D engine pistons ARE available as aftermarket parts for very reasonable prices from such vendors as Tulsa Engine Warehouse. Piston/rings/wrist-pin sets. I can't comment on quality, they are made overseas.