I just got back from a 14 1/2 hour drive to pick another jet boat up. '74 Biesemeyer 21' mini-day cruiser. I've never seen one before in person, but let me tell you that there is nothing "mini" about this day cruiser. It's HUGE. There's enough room under the bow for a bed if you wanted to put one there. 455 Olds with a (alleged) bad starter and a (alleged) bad carb. 12JC, split bowl, droop snoot, "high speed" intake grate, split bowl wedge, and a regular nozzle with a HUGE turning fin on it. Also, it has a fixed mount aluminum fin in the center of the bottom of the hull. I've never seen one of those fins but I did have a guy ask me a couple of days ago if I had one of those fins. Anyway, this one appears to have a good floor, transom, and stringers - I'm going to have to dig a little deeper into the wood tomorrow to make sure. It's a pretty interesting hull by itself. Besides the fact that it's so huge, it's got a pretty "rake-ish" entry on the bottom which smooths out to nearly a perfectly flat bottom in the back. Also interesting to me is that the exhaust log's snails have no "snail" to them, they are perfectly straight and very short. All cables seem to be good. There's even some sort of "lock out" to the forward/reverse "shifter" which actually works. All matching old school Stewart Warner gauges. The clear coat is peeling off of the hull. The interior is completely shot. I have two extra interiors right now, it'd be nice if this one had a good engine and pump so I could actually repair one of these old jet boats (besides mine) instead of striping them, dumping the hull, and parting them out on eBay. Time will tell.
I was also informed of some info so I'm going to share it. Here it is...
Hi Rod, Thanx for the reply! You know the more I think I know, the more I find out that I don't know! To my limited knowledge they only made the JC,JG,JEand JF pumps. However there was a JR. Is it possible that the B is actually an R? the rest of the numbers (Mo No and Serial No) refer to the type of package, ie engine, nozzle,transom adaptor, intake, etc.. By the way the R stood for Race! After the J_ the letter stood for the size impeller and then the type of material the impeller was made of. Hope this helps!