Question about 1977 Suzuki GS 750

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Wont start clean carbs, new plugs, ignition coil seems to be working properly, contactor looks new, starts on ether wont stay running

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  • Anonymous Mar 18, 2014

    87 flh new coil new ignitiohn mod

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Hello;
If it starts with ether then you have spark, compression, and air. All you need is fuel. Make sure that you have fuel at the carbs and that the fuel is flowing to the cylinders. Check that the petcock is open and free of debris. Hope that helps;
Thanks;
Rich
RPM Northwest

Posted on May 19, 2009

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WONT START


Not so many reasons she won't start. 4-Strokes are Simple!

Here they are:

Motor:
Fuel Tank-> Fuel Line-> Fuel Filter-> Carb-> Intake (Valve)-> Piston-> Exhaust (Valve)-> Muffler

Carb (Old Style):
Fuel Side:
Fuel Bowl-> Float-> Needle Seat-> Fuel Ports (Venturi)
Air Side:
Air Filter-> Carb Air Intake-> Butterflies (2)
(Clean 'em ALL!)

Hardware (Motor):
Rotor (Magnets)-> Magneto (Ignition Coil)-> Spark Plug Wire-> Spark Plug-> Cylinder Head (Spark Plug Ground)

Ignition:
Kill Switches (Seat, Clutch, etc.)-> Spark Plug/Ignition Coil-> Ground
Key Ignition-> Battery->Starter/Generator

If one of those fail.......= Non-Starting 4-Stroke!

Fixes-
Fuel:
You are either getting too much, or too little. Too much = Carb.
Too little = Carb. Therefore, tear down the Carb (COMPLETELY-Careful!) and clean it up.

Electrical:
Grounding out the System (Kill Switches)
Battery-> Ignition-> Starter.
Magneto->Plug Wire->Plug (Check 'em all!)


May 28, 2009 | Mtd Garden

1 Answer

New battery re-charged but still wont fire


Check for spark
If yes, it is getting FIRE, just needs AIR and FUEL

Give it a 5-second shot or two of Starting Fluid (Ether) through the Air intake (filter) and try to start

Does it kick and run really fast and then stop?

If not, pull the plug, clean and check for GAP of 2-3 matchbook covers. Retry. Does it run (or try to)?

If it does, Now we have to look at Clogged air or fuel filter or water in line(s)

Remove air filter. Try ether again. If it starts and runs, replace or clean air filter. Done!

If not... Replace AIR filter and Drain fuel into metal or Glass jug, take off fuel filter, open and drain fuel bowl. Replace fuel filter, refill tank, prime, give it a shot of ether and try again. If it runs, Done!

If it still will not stay running, but you can coax it by giving it a blast every 5-10sec, it could be linkage, stuck choke, throttle plate or jets. Give carb a good cleaning, check throttle plate (in carb throat between it and Air Cleaner) and.check Choke. Try again.

If it still will not run, take to mower mechanic.

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