Clinton has been out of business for some time.There is a number for parts.563-652-2411.You may have to leave a message.
These are marginal performers perfect for those who like to tinker.Personally I wouldn't invest too much time or money.
My Father got one of them little jewels back in the 70s I belive, he absoulty hated the thing. I think he just put it in the carbage can after useing it twice . He was funny , I remember him telling me" Look it dosent need a water pump" Boy , I thought he was going to dump it in the lake the second time he used it. ( he had me there to row for him)