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Thank you. That information gave me the direction to go. I found a complete on line service manual, and am on track to get a paper copy.

I need to overhaul this engine, and would like a good service manual. Online I found many e-manuals, and one or two CD manuals, but the reviews aren't encouraging for those web sites. Dos anyone have a reliable source for a manual for this engine? It it's an E manual, it will have to work on a Mac.

That link doesn't work, but I found a local Gravely dealer. With photos, numbers, and the faded front cover, he determined it is a Promaster 400, 22 HP, built sometime in the early '90s'. Thanks to all who replied = now the fin begins.

Thank you for the link, but it looks like my greatest skill, that of buying, trading for, accepting, or otherwise accepting one of a kind, obsolete, unidentifiable, or totaly unknown machinery is still intact. Jack's Small Engine doesn't recognize the model number, but the Yanmar engine is...

The engine is a Yanmar 3TNA72E-NC, Serial #56260. Photos attached.

I just brought this mower home, in pieces, as a favor for a friend. It has been sitting for 15+ years. The engine will arrive later; it has no compression. I would like to identify this thing for certain so I can get some manuals for it. Apparently Gravely used the name "Promaster" for many...

I'm getting ready to order a repair manual for my PC05-1 Komatsu, serial #1225, but the website shows both PC05-1R and PC05C. I can't figure out which manual to order, and at $99 each, I'd like to get the correct one, first time. I thought maybe the "R" meant rubber tracks, but, as near as I can...

I recently got an old Komatsu PC05 mini excavator with a two-pump open system. Someone added a thumb, but I don't think the plumbing is right. They capped off the metal 3/4" main return line from the valve bank and took power from that to the thumb valve, and from that valve back to the tank...

I've been working on tractors since your grandfather was young, but there is always something new to learn, and I'm sure the TBN members will be very helpful. My herd consists of an 8N Ford, TO 20 Ferguson, MF 135 Massey Ferguson, and the newest addition, (the reason I'll be asking for help,) a...