720 scare

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   Big scare yesterday, got my trusty 720 out of the shed to do some sickle mowing.  Checked the oil 2 weeks ago and then started her for the first time after winter hibernation. She fired right up and I let her warm up and then shut her back down. Picked up a new filter and oil yesterday and pulled her out of the shed to get to the main shop to change it. As I let her warm up she began to smoke and run rough. Finally she quit running while I was retrieving the oil and filter. She wouldn’t restart. After about 10 minutes of scratching my bald head, I pulled the dipstick and much to my surprise it was way overfilled. And then I smelled the dipstick, the Oder of gasoline. Darn carb stuck after I shut it down 2 weeks ago I guess. Drained the oil/gasoline mixture and my heart sank as I was thinking the worst. Bearings wiped out, scared cylinders etc...thankfully after looking at the drained fluids I didn’t see any metal fragments. Let it drain overnight thinking the gas would evaporate. Changed the oil and filter. The gas coming past the rings actually flooded the plugs shutting it down. Replaced the plugs and it fired right up. Oil pressure light went out like it supposed to and it ran like it always does. After 5 minutes of running with no strange sounds I mowed for about an hour. No more smoke and she ran flawlessly. What a relief. Installed a fuel shutoff for piece of mind. Never been an issue but it goes to show it can happen.

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AC720Man Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 Oct 2016 Location: Shenandoah, Va Points: 4641	Post Options Post Reply Quote AC720Man Report Post Thanks(0) Quote Reply Topic: 720 scare Posted: 11 Apr 2023 at 10:37pm
	Big scare yesterday, got my trusty 720 out of the shed to do some sickle mowing. Checked the oil 2 weeks ago and then started her for the first time after winter hibernation. She fired right up and I let her warm up and then shut her back down. Picked up a new filter and oil yesterday and pulled her out of the shed to get to the main shop to change it. As I let her warm up she began to smoke and run rough. Finally she quit running while I was retrieving the oil and filter. She wouldn’t restart. After about 10 minutes of scratching my bald head, I pulled the dipstick and much to my surprise it was way overfilled. And then I smelled the dipstick, the Oder of gasoline. Darn carb stuck after I shut it down 2 weeks ago I guess. Drained the oil/gasoline mixture and my heart sank as I was thinking the worst. Bearings wiped out, scared cylinders etc...thankfully after looking at the drained fluids I didn’t see any metal fragments. Let it drain overnight thinking the gas would evaporate. Changed the oil and filter. The gas coming past the rings actually flooded the plugs shutting it down. Replaced the plugs and it fired right up. Oil pressure light went out like it supposed to and it ran like it always does. After 5 minutes of running with no strange sounds I mowed for about an hour. No more smoke and she ran flawlessly. What a relief. Installed a fuel shutoff for piece of mind. Never been an issue but it goes to show it can happen.
	1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD

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Fred in Pa Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 13 Sep 2009 Location: Hanover Pa. Points: 9106	Post Options Post Reply Quote Fred in Pa Report Post Thanks(0) Quote Reply Posted: 16 Apr 2023 at 7:48am
	That's good but when you want to check for metal in oil , take the oil filter apart .
	He who dies with the most toys is, nonetheless ,still dead. If all else fails ,Read all that is PRINTED.

AC720Man Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 Oct 2016 Location: Shenandoah, Va Points: 4641	Post Options Post Reply Quote AC720Man Report Post Thanks(0) Quote Reply Posted: 17 Apr 2023 at 4:43pm
	Good point Fred, ran it again yesterday with no issues. Hoping I dodged a bullet.
	1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD