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Message: <blockquote data-quote="Fishfiles" data-source="post: 40649" data-attributes="member: 782"><p>After revisiting this thread I relized that it is a 743 and not a 753 that we are talking about , the possible causes for your problem I listed are ok except to delete the smashed fuel line from motor mount problem as 43 didn't have that problem  , I realize now you have the old style Lucas /Cav filter and bowl set up , that freaky looking on/off valve mentioned haas a very small passage way and does clogg up ,  if the machine were mine I would change the filter head to one that uses a screw on filter even if I wasn't having a problem as those filter can cause problems with air leaks and are messy  to change out --------they make  an adaptor that screws on to the original filter head and accepts a fuel water seperator filter , they use to sell for about $40 but that was quite a few years back , a Lucas Cav dealer should be able to get one for you</p></blockquote><p></p>