Does it have spark?
SOURCE: john deere 420 trouble starting getting gas and
The engine needs air, so be sure the air filter is clean. If it is not, replace it.
The engine needs spark. Replace the spark plug and be sure that the battery has a complete charge.
The engine needs good fuel so be sure the gas is newly purchased, not gas that has been sitting around for months.
SOURCE: 1997 Jeep Cherokee(4.0) will not start. No spark
It sounds like the crankshaft sensor is the problem
SOURCE: I have John Deere GX345. It does not start
Look for a small silver box with 1 wire on it mounted to the motor. It is a temp sensor and will keep it from firing...Just had to replace mine...
SOURCE: I have a John deere 317 tractor that does not start.
We will be testing for voltage to the points, coil, engine to tractor wiring harness, ignition switch
Tools needed:
volt meter to read 12 volts, or test light
1) with the points open: is there voltage at the connection wire at the points
If yes; adjust points to .020" and try to crank engine and check for spark
*** you may want to determine if condensor is connected to this wire also
if no
2) check point side (neg or - ) of coil for voltage
if yes, engine should start
if no
3) check for voltage at the + side of coil
If yes, coil is bad
if no
4) check wire connector from engine to frame wiring harness
if yes; engine should start
if no
5) check wiring on the back of ignition switch
if yes; engine should start
if no
6) check that ignition switch RED or BATTERY supply wire has voltage
if yes; switch is bad
if no
7) check supply wire and circuit breaker connected to the battery side of the solenoid
if yes; engine should start
if no; circuit breaker could be at fault or wire connector at battery supply
I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae
SOURCE: John Deere L110 won't start.
check the solenoid on the bottom of the carb see if there is power if no power check the safety switch on the brake/clutch if there is power remove the solenoid and put power and ground to it to see if it opens if not try and clean it with carb cleaner if that works and opens remove the bowl from the carb and check the needle valve on the float make sure it moves
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