Question about 1996 Suzuki GSX 600 F (Katana)

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60 psi in a 4 cylinders and fuel won't get to carb

OK i have a1996 gsx f 600 that has new spark plugs new battery and the carbs have been cleaned multiple times and i tested the pressure on the pistons and it was only 60 psi but all 4 were the same pressure and there is no fuel getting to carb bowls and i rebuilt the petcock not to long ago any advice?

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  • 23 Answers

Regarding compression, your valves may need adjustment. Since compression is even across cylinders I doubt the rings are at fault here. As far as the bowls are concerned, your needle valves may be stuck closed. Tapping on the fuel bowls with a screwdriver handle a few times usually loosens them up and allows fuel to flow again. If not then you may need to check your petcock again as it may be clogged.

Posted on Jan 26, 2013

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1998 Suzuki GSX 600 F (Katana) only running on 3 cylinders


Hey Anon,
...If the bike has been sitting for a long time,.. as you state..99.999% chance its the carburetors, they are probably clogged/stopped up/dirty.. (sitting for this long has actually ruined some carbs to the point of replacement).. all the garbage that is included in gasoline now is really bad on the insides of a carb!!) Take them to a qualified professional for checking, cleaning and setting .... Check the compression on all cylinders.. you should have at least 120+psi. MINIMUM.... with no more that 20PSI. max difference between ANY two cylinders... Forget about all the minutia in the first answer.. just a bunch of copy and paste... no real life experience..he's just racking up points

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I have an etco chainsaw that will only start on the choke and stops almost immediately. The carb has been cleaned and a new diaphram fitted. A new fuel filter has also been fitted and spark plug. The spark...


Basics to check:
1) Spark plug - brown or dark brown - OK
- aluminum or silver - piston/cylinder scored
a) is it carbon or fuel fouled
b) is there spark

2) Compression - 125 to 150 psi

3) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated

Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
ChainSaws:
5) check impulse tube and intake boot for cracks or leaks

*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Please double check the gasekts/diaphragms for proper installation

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Basics to check:
1) Spark plug - brown or dark brown - OK
- aluminum or silver - piston/cylinder scored
a) is it carbon or fuel fouled
b) is there spark

2) Compression - 125 to 150 psi

3) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated

Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
5) replace gaskets/diaphragms
b) use a spray carb cleaner to clean jets, holes, and body of carb

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Basics to check:
1) Spark plug - brown or dark brown - OK
- aluminum or silver - piston/cylinder scored
a) is it carbon or fuel fouled
b) is there spark

2) Compression - 125 to 150 psi

3) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
5) replace gaskets/diaphragms
b) use a spray carb cleaner to clean jets, holes, and body of carb

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1 Answer

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Basics to check:
1) Spark plug - brown or dark brown - OK
- aluminum or silver - piston/cylinder scored
a) is it carbon or fuel fouled
b) is there spark

2) Compression - 125 to 150 psi

3) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated


Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
5) replace gaskets/diaphragms
b) use a spray carb cleaner to clean jets, holes, and body of carb

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