No you don't need compression to get spark but you do need compression for it to run.
Box compression tester in Gujarat uses as a tool to check an engine's compression. It enables the user to gauge the engine's pressure output to make sure it is operating effectively. Compression testers are necessary for both detecting engine issues and optimizing engine configuration.
a diesel engine uses compression and has no need of spark plugs
Does it have: fuel, spark, compression?
Fuel, compression and spark.
Compression yes,spark no computer will sense cams and not fire the motor.
Check the spark. If that's good check compression and timing. Check the spark. If that's good check compression and timing.
All, but one at a time. What your testing is the compression of each cyclinder. Remove them all when checking compression.
spark ignition itself can easily burnt the air fuel mixture hence the high compression ratio is not needed.
An engine requires gas and spark to fire but it also requires compression and timing. If it has gas and spark, I would check the compression...should be over 100 to run good. If it has good compression then I would check to see if the spark occurs when the compression does. If it doesn't then you probably have a sheared key on the flywheel.
Check for fuel, spark, compression
Does it have fuel, spark, compression?
S.I Engine lower compression Ratio is 6 to 11