I have a 1993 Kawasaki jet ski with a bogging down problem. Any thoughts?

Question

Just recently purchased 2 1993 Kawasaki 750ss jet skis. These skis have not been run in about 1.5 years. I drained out all the old gas. Checked the gas lines for trash. When I use the choke to pump gas into the carbs it will run, but when I give it gas it starts to bog down and eventually stalls. Any thoughts on how I might fix this problem?

Answer 1

Try new plugs,be sure to gap them. Might also be starved for fuel.

Answer 2

sounds like a fuel flow problem

Answer 3

it is probably back pressure through the exhaust system.  If the skis were used in beach settings your ehaust could be filled with sand.  it plugs up the exhaust as it heats and makes the ski over heat.  Pull the entire exhaust system and make sure it is clear of debris and sand.  We had the same thing happening with one of our Yamahas.  once the exhaust system was purged their were no furthur problems.  

As in all marine engines, they are more sensitive than auto and motor bike engines.  check your fuel filters, plugs and the diaphram.  all could be contributing.

Running skis full time in a commercial business really lets you know how important maintenance can be.  If you are not someone who is just using the skis on holiday you need a real good mechanic.  Make friends with him. you will be seeing him alot.

Answer 4

Sounds if everyone got everything cover on the motor and carb problems. But my one question was there anything else done to the motor's. Where they sup-up in horse power. I sup-up my old Kaw, so fast. It would not got anywhere when i gave it the gas. Turn out the proper was bent out of shape. Plus putting on a Stains Steel Proper did not wrap the pitch out of shape from a stock. And actual help everything improve with speed and etc.... Rocks in proper can cause some problems if proper starts to show major wear on blades.

Answer 5

This is pretty simple, pull the carb, do a rebuild-this is not "rocket surgery", but, you do need some parts and a can of carb cleaner-if you have never done it before, get some help, but do not be afraid to take off the carb, take a digital picture of what it looks like before you take it apart, take it to a dealer, let them do the rebuild-really they are just cleaning the jets and orifices-and then re-install the carb-should run like a champ. Any time these units set for a while, the gas evaporates, and leaves the oil residue/gas varnish-this is just normal maintenance-o yeah, don't run this thing out of water very long without rigging a cooling system, you really will have problems!  ps, the guy from vietnam doesn't have a clue!