if it keeps running its low on gas. you can still git 502. but the cost is out of hand. you might be better off to change it to mp39 or 404. but make sure what gas will blend with your composer oil. and you will have to change the cap tube. git all numbers off the composer call a ref. store. ask them what freon will mix w/composer oil. they look up the numbers and tell you. im glad i was a help to you. leave a little slack in that belt. it"ll last longer and will ease the tenchen on the gears in the gear box . good luck sell more ice cream. its hard to sell in the winter.