Well there wasn't that much that was wrong with it. It's was Serviced 3 weeks ago. The Rough engine at 1600RPM cruising seems to be sorted, so that might have been the plugs, as for the engine cutting out down Wooten Creek, nothing was found during the Service, so might well have been the primer bulb being soft, might even have caused the rough running too.
Looks Slow but is Fast
Member of the ebay Blue RIB cover club.