Hey everyone, I've been hangin around on the forum for awhile now pretty much just trying to learn things. I bought an 18' Sutphen bare hull last year and haven't had much time to work on it and recently traded my motorcycle for a 74 Wriedt 18' jet boat with an Olds 455 and a Berkeley JC pump with a Jetovator. The hull needs a ton of work and i'm not too sure whether I should use the drivetrain in my Sutphen hull or do the work on the Wriedt or maybe eventually both. My main question is about the pump. I pulled the bowl off and was curious how difficult should it be to turn the impeller? Should it spin freely and easy or should it take some force? It feels really tight and takes 2 hands to turn it. Nothing has been removed except for the bowl. I'll post up a couple pics of what I got. Thanks, Jeff
impeller should turn freely by one hand. Thrust bearing is prolly going bad, if you can hear grinding noise while turning could be the impeller is dragging on the wear ring. Pull the thrust bearing cap on front of pump (4-allen/socket head cap screws and see how it looks, smells etc). Also remove impeller with correct impeller pulling tool, sometimes they can be really stuck to the pump shaft, and see what the impeller shoulder and wear ring surfaces look like. Pics. go a long way to help us help you. Good luck, have fun. Is the hull pictured the Wreidt or Sutphen? If the 18' Wreidt performs anything close to their early (double step deck 21' daycruiser) hull it should be a very fast, fun and good handling hull. In the early 80's my uncle bought the 21' molds, retooled the deck mold to the then modern style single step "off shore" look, emulating the eliminator sport 20 and other manuf. of the era and marketed them as Royale Boats Out of Ontario Ca. His prototype hull (first out of the molds) weighed 950# bare hull, had a stock 425 hp Dominator engine/pump package with thru-transom lightning headers, his hardware pkg., shoe, ride plate set up etc. (he ran/set the record in a 18' Texas tunnel in unblown fuel jet with njba, 1983) Fully dressed with complete family interior the boat ran 72 mph in the 1/4 mile at blue water, Parker Az. First pass off the trailer. It worked and rode very well. If the 18' you have has the same hydrodynamic performance qualities as the 21' you will be very pleased with your efforts to restore especially if you desire to go fast. Let us know what you find.
So I finally had a chance to look at the pump today. It definitely doesn't turn with one hand. It takes two hands and a hell of alot of force to get it to turn at all. The bearing looks good and its covered well with grease. I don't hear any noise when turning it at the bearing end or impeller end. Could it have anything to do with the packing rings? It is extremely tight looking there. I will try to get pictures up. I wish I were on the west coast where there seems to be a whole community of jet boaters. You just don't see many around here. If there's anyone in central FL that can help out let me know.