4 stroke timing

[WEEDHOPPER420]

Ok i have a subaru ex17 4 stroke engine thats back fireing out the exhaust so i took off the side plate and head cover to set the timing. I set it as specified (gold links on timing marks on crank and timing gear at tdc) but when i hand rotate the engine 1 rotation from tdc to tdc the gold link has shifted 2 links over . Every rotation is exactly 2 links firther WTF

 

[WEEDHOPPER420]

Sorry just seen i posted in the wrong room

 

[WEEDHOPPER420]

And also when the motor is assembled the crank shaft moves in and out a bit

 

[DAMIEN1307]

Sorry just seen i posted in the wrong room

I moved it for you to the 4 stroke section of the forum.

 

[GW's Motorized]

Does the engine have a timing chain?

 

[WEEDHOPPER420]

Yes it does have a timing chain

 

[WEEDHOPPER420]

I moved it for you to the 4 stroke section of the forum.

Thanks

 

[meridianPeteJ]

Ok i have a subaru ex17 4 stroke engine thats back fireing out the exhaust so i took off the side plate and head cover to set the timing. I set it as specified (gold links on timing marks on crank and timing gear at tdc) but when i hand rotate the engine 1 rotation from tdc to tdc the gold link has shifted 2 links over . Every rotation is exactly 2 links firther WTF

If you keep turning it over will they eventually line back up again? I believe but dont know for sure thats how a 4 stroke works
Only reason I am saying that is I am working on my ford f150 truck motor now and to get the timing marks to line up after you set the timing on the marks it takes a minimum of 150 revolutions to get the timing marks to line up as I set them in the first place. I know thats comparing apple to oranges but it might help

 

[DAMIEN1307]

Yes it does have a timing chain

If you keep turning it over will they eventually line back up again? I believe but dont know for sure thats how a 4 stroke works
Only reason I am saying that is I am working on my ford f150 truck motor now and to get the timing marks to line up after you set the timing on the marks it takes a minimum of 150 revolutions to get the timing marks to line up as I set them in the first place. I know thats comparing apple to oranges but it might help

It timing chain could have jumped time...Just a thought.

 

[WEEDHOPPER420]

If you keep turning it over will they eventually line back up again? I believe but dont know for sure thats how a 4 stroke works
Only reason I am saying that is I am working on my ford f150 truck motor now and to get the timing marks to line up after you set the timing on the marks it takes a minimum of 150 revolutions to get the timing marks to line up as I set them in the first place. I know thats comparing apple to oranges but it might helit

It does if you rotate it enough and i was thinking the same thing at the time but when i started it up itll fire right up but its backfiring out the exaust pretty much any time i add throttle but idols fine so i know thats a sign of the exaust balve opening at the wrong te so i figured i must be mistaken about the timing