case442 130 #1 Posted May 12, 2011 Hi all, I picked up what I think is a 551. I pressure washed it tonight and found part of the sticker with the serial number on the frame rail, from looking at other members photo's, I belive its a 551. It has a three speed with reverse trans. It has a 3 HP clinton on it, can anyone tell me what size the engine pulley should be and what size belt it would take. Both are missing. Thank you, Mike Share this post Link to post Share on other sites
Kelly 1,028 #2 Posted May 12, 2011 A couple pictures would help ID it, a 551 is a electric start 5.5hp lauson/tecumseh, and has the unidrive much like the newer tractors, a 2 piece cast housing, like I said a picture is the easy way to ID it, parts can be swaped over the last 50 years, but we can get close. Share this post Link to post Share on other sites
VinsRJ 721 #3 Posted May 12, 2011 I agree with Kelly, a pic is the best way to ID a tractor of that vintage. Share this post Link to post Share on other sites
