So I'm a little confused; you stated in your first post that the RH rotation starboard engine had the "standard" firing order? If it's a counter rotator (RH), it would not be the standard firing order. Secondly, can you confirm that you in fact have a counter rotator in a 1993 application. Would have thought that vintage would be two standard rotation engines with shaft rotation changed at the tranny.
I share Woodie's confusion.
Can you clarify for us?
I will check on everything that you have said, but like I said earlier, I personly marked the cap w/ #1 & #8 plug wires and they were directly across from one another, not side by side like on the starbord motor. starbord motor is corrct w/ the firing order and starts every time. I know its wierd.
ECC, I've only seen maybe one or two engines whereby the OEM Marinizer opted for an optional firing order, and of course, this demands an entirely different camshaft. One that I recall is the small block Ford.
I'm not aware of any Marinizer doing this to the GM engines.
IOW, whether Std LH.... or REV RH, the crankshaft/camshaft relationship has always dictated the ignition firing order.
As we reverse rotation, and we reverse ignition firing order.
It's all tied in physically to the crankshaft/camshaft relationship and orientation..... (that and a firing order that works dynamically with balancing the rotating mass..... but that's another story!)
But hopefully you get my point!
ECC, if you are suggesting that #1 plug location in the cap is not adjacent to #8 plug location in the cap.... then ya got me.
Everything in the firing order would appear to dictate (no matter which rotation, LH or RH)........, that #1 and #8 will remain adjacent to one another......
either in front of, or behind the other..... but definitely "adjacent".
Here's one sure fired method to find the actual intended firing order, and it's fairly good proof.
Pull the valve covers.
Beginning at #1 cylinder... bring her up on C/S #1.
No question about #1.... we're there, and we know that this one is about to fire (or has just fired).
Rotate crank 90* in the direction that the engine is intended for.
Note which cylinder has just cycled an Intake Stroke, and is now on C/S.
This one is next to fire (or has just fired).
Note this on paper.... and repeat this cycle indexing the crankshaft 90*.
By the time that you have made a 720* crank sweep, you'll have your ignition firing order.
Optional method:
Intall 7 compression test gauges (no need to do #1), and monitor them as you make a 720* crank sweep!
Of course I'm joking on that..... but it would actually work... and it would well!
Hey Woodie.... did you notice that he's a Charter Boat operator?
Can you smell a nice package of smoke Salmon in the mail for all this help we've been offering?
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