Limp Mode?

4784 Views 6 Replies 4 Participants Last post by wmazz, 13 d ago

nate3382

Discussion Starter · Jun 19, 2016

Hey everyone, I have a 96 TigerShark 900 that seems to be going into limp mode when I take it out. It is also having trouble starting without spraying a little gas into the air intakes when it is a cold start, but once its warmed up it starts up great. I unplugged the heat sensor to try that and it still went in what I feel is limp mode. I ran it without the seat to see if more air getting into the engine would make a difference and it ran much better, but after a bit it went back into limp mode. I have been told to replace all my gas lines, rebuild the carbs, look at the fuel pump and replace the impeller jet system but I was hoping to get it working without a new jet pump system this year. Could the bad impeller cause this or does fuel seem more of the problem and the impeller will just make it not take off fast? Sorry, I'm very new to PWC

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t.50682/

· #2 · Jun 19, 2016

The only limp mode you should have is over heat, which you disconnected the sensor, so that should be out of the picture.
When is the last time it ran good ?
Pull the air cleaner top off and look for obstructions, and check the hull venting for obstructions.
Sounds like you are do to kit the carbs and fuel pump.
I'm surprised they didn't tell you to rebuild the engine. hahaha
The only reason you would need to look at the jet pump is if the impeller was dragging, or wear ring is bad which would cause it to act like it was cavitating, and just spin the impeller and not really move.
I would also do a compression check to make sure there is not anything going on internally, and check the oil injection lines to make sure they are not leaking or coming off.
Also, check the fuel filter.

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nate3382

Discussion Starter · #3 · Jun 19, 2016

rodsatheart said:
The only limp mode you should have is over heat, which you disconnected the sensor, so that should be out of the picture.
When is the last time it ran good ?
Pull the air cleaner top off and look for obstructions, and check the hull venting for obstructions.
Sounds like you are do to kit the carbs and fuel pump.
I'm surprised they didn't tell you to rebuild the engine. hahaha
The only reason you would need to look at the jet pump is if the impeller was dragging, or wear ring is bad which would cause it to act like it was cavitating, and just spin the impeller and not really move.
I would also do a compression check to make sure there is not anything going on internally, and check the oil injection lines to make sure they are not leaking or coming off.
Also, check the fuel filter.

I replaced the fuel filter, spark plugs and I did have the compression checked and it was good. He was thinking it seems like its starved for gas but its not stalling, its just shutting down like the engine is slowing itself down to a stop and then instantly, it was take off again but go right back to a slow down mode. Ill check the air hose today, and check the lines in my gas tank to make sure they didn't corrode off. I just purchased the unit this winter so I haven't had it running good yet, but seems like each time I take it out, it gets better and better after doing work to it.

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t.50682/

· #4 · Jun 20, 2016

Need to kit the carbs. and fuel pump. That sounds like a fuel starvation issue.

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nate3382

Discussion Starter · #5 · Jun 21, 2016

rodsatheart said:
Need to kit the carbs. and fuel pump. That sounds like a fuel starvation issue.

Thank You, Ill give this a try

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w.trapp1221

· #6 · 13 d ago

digging up the grave of this thread 99 tigershark TS900L Spark on cylinder 1 and 2 but not 3, followed this thread, did a carb kit, fuel pump, completely rebuilt this engine but used a thundercat snowmobile crankcase because previous owner didn't winterize. Swapped leads to coils to see if it's coil issue, no luck. Limp mode? Or CDI issue? I'll try disconnecting the temp sensor

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wmazz

· #7 · 13 d ago

Most ignition problems are not caused by the ign coil or
cdi unless severe rust damage is involved. Severe rust
will affect the stator and pick-up coil.

The ignition coils spark plug wire core can break, the
resistor cap can go bad, and the plug wire insulation can
stretch and prevent the resistor cap from making contact
with the plug wire.

Try this first, an A/C voltage test on each set of the primary
wires from the cdi. Best guess is ~200vac. If one set of
primary wires from the cdi does not natch the other 2, then
obviously the problem is before the coil (cdi, stator, pick-up,
or wire loom), otherwise it is the coil.

Normally heat and vibration kills electrical parts, that is why the
stator is a common weak point on any watercraft. But the 900
looks like a battery powered ignition.

Bill M.

You could also make a Peak D/C voltage tester too.

Do not trust Chinese replacement parts to fix the problem. Try
to find used in working condition.

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