Correct firing order?

[solaire]

So I was looking at the FSM book page scans on here and it says firing order is 1-2-3-4-5-6 but everything else I've been reading says 1-5-3-6-2-4. Which is right?

[t.mcginley.jr]

I'm fairly certain the FSM is correct, not sure where the 1-5-3-6-2-4 order came from though

[solaire]

Me either but I've seen some sites that say it and even some forums on nico that say 153 not 123

[t.mcginley.jr]

If you had a crankshaft laying around you could figure it out, or even spinning your engine over by hand and see the order is of the pistons as they come to TDC.

[solaire]

I've got an engine with no compression on #3 so I"m trying to figure out which TDC is compression and which is exhaust so I was planning to get compression #1 and follow the firing order using the next TDC #3