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marc, Technician,Auto
Category: Chevy
Satisfied Customers: 1888
Experience:  32 years exp. automotive repairs Gm cars and trucks
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what is the firing order for an inline 6 chevy 250 straight 6

Customer Question

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Submitted: 8 years ago.
Category: Chevy
Expert:  marc replied 8 years ago.
What year and what model car or truck?
Customer: replied 8 years ago.
it is a G.M. inline 6 250 cubic inch engine that is in a 1968 glasspar boat
Expert:  marc replied 8 years ago.

The firing order is 153624

As for the timing it can be any number of different settings because of a Marine aplication They somtimes had vacuum advance sometimes not.

I would advance the timing and then slowly retard it (under a load) untill just before the engine starts to ping.

Don't forget to set the point dwell before attempting to set the timing.

1: Inline six cylinder enginesFiring order: 1-5-3-6-2-4Distributor rotation: clockwise



If you have further questions please post back

Regards Marc

marc and 3 other Chevy Specialists are ready to help you
Customer: replied 8 years ago.
ok i wil try your anser and see if this works thanks
Customer: replied 8 years ago.
hey dud thanks and i must say you guys know your shit, it fired up the first crank after i set the firing order you recomended ,