Re: Hot Water In The Bottom Of My 1994 Bayliner Jazz Jet Boat
kmartin, I finally had this issue fixed with my jetboat. Here's what I'd suggest:
1) If you haven't gotten a service manual yet, go over to jetboat14.com and join there. Go to the Jazz section and ask around. That's specific to small jetboats. I'm sure someone there can help you find a service manual fo rthe Jazz and also for the SportJet.
2) Make sure your drain plugs are in, then put the boat in the water -- have at least one good helper on board with you. Don't even leave the launch area if you can help it. (You'll need to move out a little bit 'cause even in neutral there's some propulsion thrust). There should be a pin on your throttle assembly to pull out so you can rev the engine slightly without really engaging the drive jetpump. (Turn the steering wheel so you go slowly in a small circle). Now lift the engine hatch and make some careful observations.
a) I doubt if your drain plugs are leaking, but look there.
b) Look at all the water hoses leading in and out of the engine to see if there's any leaks. I bet there won't be.
c) Look carefully around the base of your sportjet engine. For me, there was a small but steady stream of water between the engine and the jetpump housing. There's a gasket between the jetpump and the engine that went out on mine, and based on what you've said (hard landing on some rough water), I'll bet that's what happened to you, too.
d) There may be other points of failure, such as the exhaust manifolds, but that's unlikely. Look around anyway while the motor is running in the water to identify everything you can.
e) Also check your bilge pump and the fuse to it. If you've got that much water, it's possible you blew the fuse (happened to me, too).
As soon as you identify where the water is coming in, get back to the ramp and pull your boat out.
IF this matches what you see, then you'll have to pull the engine to replace that gasket. There are some photo sequences on jetboat14 on doing that, but unless you're really handy and knowledgeable, I'd suggest you have a good marine mechanic do it. In any event, when the engine / jetpump is reassembled, make sure that *every* bolt is properly torqued. (If you don't have a good torque wrench don't even try it yourself). The first mechanic I had work on our boat didn't properly torque everything... and I just got it back from a good mechanic with all 3 pistons brand new, cylinders re-bored, etc etc. So please don't let this happen to your boat.
Hope this helps.
Al
