This is probably a dumb question, this is my first 4 stroke. I accidentally pulled the decomp lever when it was idling and it killed the motor. Does this hurt anything? It is an 2008 fe450.
decompression lever
- Thread starter mantrap
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mantrap said:
If you follow the cable down, you will see that it's connected to a little lever on the cilinder head, if you pull the cable, the lever pushes open one of the exhaust valves slightly, messing up the mixutre and the engine dies.
I only use it to put the engine past compression prior to kick starting.
Here you can see the inside of the head, in the left hand bottom corner you can see the lever that pushes open the valve:
berger said:
Didn't know this, my berg doesn't even have a kill switch, I always stop the engine with the decomp lever, what exactly is the problem with doing this?
Joined Nov 2001
17K Posts | 774+
Ely, England
you're probably ok but what ken means is that you are effectively bashing one piece of metal into another to try and hold it open. it's first task is to get the bike past compression while the engine is DEAD so i think you'll agree - the tasks are a little different!
regards
Taffy
regards
Taffy
The full explanation is that the decomp lever is there to manually open one exhaust valve to release compresion and allow the piston to be moved just past TDC on the comp stroke with the kick lever prior to giving it a kick start.
Operating the lever with the motor running will also release compression from the combustion chamber and so the motor stops. It also means that the exhaust valve will bash itself against the decomp lobe until the motor stops and this can be felt as small pulses through the decomp lever.
Using the decomp to stop the bike will wear out the decomp lobe faster than if you use it to start the bike.
Operating the lever with the motor running will also release compression from the combustion chamber and so the motor stops. It also means that the exhaust valve will bash itself against the decomp lobe until the motor stops and this can be felt as small pulses through the decomp lever.
Using the decomp to stop the bike will wear out the decomp lobe faster than if you use it to start the bike.
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