Question about 2003 Suzuki GZ 250 Marauder

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I have a 1999 Suzuki GZ 250. It has been sitting for about 6 years. It has a new battery, new plug and it just cranks, but will not turn over. HELP

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I assume you have checked and that you do have spark.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.

Please rate this solution. Thanks!

Posted on Apr 22, 2009

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  • Suzuki Master
  • 442 Answers

Will the starter crank the engine over,if not check wiring at the starter and the solenoid.contact me at whubby@live.com

Posted on Oct 19, 2010

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I had a similar problem, it was the choke cable had rusted to were it would not move enough to choke properly.  I used rust remover and freed the cable and put back together and the bike started right up.

Posted on Jun 25, 2009

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I doubt its electrical in that sense.
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Sounds like a bad battery. Try charging overnight with a 1 or 2 amp charger.
If this doesn't help then go to the dealer and ask for the stock plugs for your bike. Check for spark on each of the new plugs then install the plugs.

Remove the carbs , dissemble it and clean the varnish out. Remove the petcock, ( gas valve ),water trap and clean it out. Next let one cup of gas flow into a container. Any water or rust in the bottom of the container? If any rust was in the water trap or the container then purchase an inline fuel filter to eliminate the rust getting into the carb.

If cleaning the carb yourself does not do the trick then take it to the dealer and have them clean it and install a carb kit. This should eliminate the carb as a problem. Get a new air filter and install it.

Now you have spark, gas and air. If it still will not start it is likely that you need new crank seals. On a bike that old you may well need new crank bearings as well.

Mar 21, 2009 | 2002 Suzuki GZ 250 Marauder

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2002 suzuki gz 250 marauder won't start when you hit the starter. lights work . has not been rode for a year. was in a shed


Pull the fuel hose off to see if fuel will run out when the fuel tap is 'on'. If nothing, check the tap filter screen for plugging and clean it with spray carburetor cleaner. If you get fuel to run out, try checking the float needle in the carburetor for sticking.

Mar 19, 2009 | 2002 Suzuki GZ 250 Marauder

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