I've been doing a little reading up on this forum and it seems like there is some good knowledge here! I just got my first jet boat!!! it is an 18' 78 baja with a 402 BBC that was just rebuilt within the last year, 396 bored .30 over and I'm guessing to stock specs, gm aluminum intake and unknown holley carb. with a berkeley jet drive. Here are some pics of it and the engine. It is in quite good shape for it's age and runs like a sewing machine (a loud sewing machine lol).
I have taken it out twice Since I bought it last week and had a few questions with it. I have fixed a few small things like a new battery etc. but now all of this jet drive stuff is foreign to me. First thing is that I notice is that it runs at about 4800 rpms at WOT (assuming the tach is right)and it runs about 45-47 mph with myself and my girlfriend in it..... is it just me or does that seem a little slow for the engine and boat??? I was thinking it would do more to the tune of 55-60 at least. Also the next thing is reverse seems to be almost non existent and sometimes it works sometimes it doesn't. I checked on land and if you pull the throttle backwards the cap comes down over the jet like it should but it doesn't come down all the way until its way back it seems like, by then it is shooting water into the back of the boat but still doesn't seem to go in reverse hardly at all. I have it trimmed all the way down should it be up when trying to reverse? It almost seems to work better sometimes if I pull the neutral switch out (the little knob next to the throttle that seems to lock that plate in plate) and push forward on the throttle then it will reverse better????? Maybe I am just not used to it especially since the shifter isn't like a regular outboard where you have to pull the button up and shift into forward or reverse. I will get the exact model of berkeley on it and some pictures of the setup for you guys to take a look at when I get off work. Any input would be greatly appreciated! especially on the reverse issue because it is embarrasing as hell when you can't reverse when you are trying to dock the boat.