Kawasaki 750 SXi Problem (95)
Keith Alphonso
A couple weeks ago I sank the boat, hood came off mid-air...not good. Had
to be towed (in submarine mode) for about a mile.
Brought it home, drained the tank, cleared the cylinders, refilled it,
dumped loads of gas down the carbs, got it running again. Runs great on the
trailer...not so good in the water.
Took it out, but it was bogging pretty bad. I could get it up to speed
eventually, but would take a while. Any tricks would kill the motor and
make it hard to start again (like still getting water from somewhere). I
think the problem may have been that the crank-case bottom was still open
from when I cleared it?? Is that possible?
Anyway, brought it home again, this time drained the oil tank in case there
was water in there (didn't find any) and fiddled with the crank-case
pull-thingy (whatever that's called). In doing so I noticed that 2
motor-mounts were broken and my exhaust had come loose, so I fixed both of
those (new gaskets on the exhaust, 2 new motor mounts at $50 apiece).
Again, runs good on the trailer...not good in the water.
Anyway, take it back out, now it doesn't seem to be bogging, but will not
get up to speed, almost like its got a governer on it now. Won't go over
couple-thousand RPM. Top speed 20mph with no bottom end.
So I change the plugs to see if that helps, but it doesn't. Funny thing
though, when I took off after changing the plugs it had power for a few
seconds, then cut back down to low rpm mode again.
So now I'm thinking maybe I screwed up something when putting on the exhaust
and there's an exhaust leak in the hull. So to try it out I popped the cork
on the hood to let more air in. This made absolutely no difference in
power, so I'm assuming that its not an exhaust leak (is this a good enough
test?).
So now I'm thinking maybe the exhaust is leaking water into the cylinders
somehow. To test for this I hooked the hose to it in the driveway, got it
running at a low idle and let blast with the hose. This didn't even budge
the idle. It idled just fine whether the water was running or not, so I'm
assuming no water into the engine through the exhaust (again, is this a good
test?).
So anyway, to make a long story short, anybody got any more ideas??
I'm thinking the next place to check is the carbs, could have picked up some
junk from that water in the tank, but I would like to know if there is a
test for this? I hate to pull that down and pay to get the carbs rebuilt if
thats not needed.
Anything else I should try??
Thanks for the help guys!!
Chester
Do a compression test to see if both cylinders are the same. You might have
bent a rod. Also, check your reeds.
Chester
The Jet Factory of Canada Ltd.
604-856-8110
"Keith Alphonso" <kalphonso-at-charter.net> wrote in message
news:10cvcqj...@corp.supernews.com...
Keith Alphonso
test to see if the problem is in the carb? Or do I just eliminate
everything else!
"Chester" <jetfa...@telus.net> wrote in message
news:8k1Ac.48371$Ds.15799@clgrps12...
Steve DeGeest
have found very little to ever go wrong with the carbs, especially if
they worked fine the day before. You may want to tear them down
completely, including all air screws, use compressed air to blow them
out. Also on the fuel filter than is in the pump side of the carb, it
is hard to find unless you know it is there, pull it out and spray it
with carb cleaner, then use compressed air again to blow the stuff
out. It's way more detailed, but just pay attention, count the number
of turns out on the air screws by turning them in one at a time and
counting revolutions, mark that number down, and you will know it's
not your carbs anyway, plus they will be clean!
Good luck,
Steve
"Keith Alphonso" <kalphonso-at-charter.net> wrote in message news:<10d20lr...@corp.supernews.com>...
TDWFL
>Checked compression, 160 in both cylinders, anything else? Is there any
>test to see if the problem is in the carb? Or do I just eliminate
>everything else!
It sounds like either an exhaust leak or maybe fuel sitting in the hull. Try
tying it to something or putting the nose against a piling and run it hard with
the hood on, then with it off.
Tim