Crusader Counter Rotation #1 Spark Plug Location.

[harringtondav]

Mercruiser forum seems the best place for this question.
Asking for my boating pal who owns a '89 Bluewater Coastal Cruiser with twin Crusader 350 hp SBCs with shaft drive. Last summer I helped him with basic ignition shot gun tune up. Coil, upgraded hall effect points replacement, cap, etc to address a performance issue on his port engine.
His old Craftsman inductive timing light wasn't reliable, so he let it set for the winter. He recently threw up his hands and had a marina mechanic try to time it. Guy said this is the counter rotating engine and the #1 plug was the rear starboard plug. ...worse performance in a water test. Guy also said the distributor turns opposite from standard.
Based on flywheel direction, which engine is counter rotating?
What/where is the #1, or correct plug wire for setting timing?
As always, thanks.

 

[Scott06]

Mercruiser forum seems the best place for this question.
Asking for my boating pal who owns a '89 Bluewater Coastal Cruiser with twin Crusader 350 hp SBCs with shaft drive. Last summer I helped him with basic ignition shot gun tune up. Coil, upgraded hall effect points replacement, cap, etc to address a performance issue on his port engine.
His old Craftsman inductive timing light wasn't reliable, so he let it set for the winter. He recently threw up his hands and had a marina mechanic try to time it. Guy said this is the counter rotating engine and the #1 plug was the rear starboard plug. ...worse performance in a water test. Guy also said the distributor turns opposite from standard.
Based on flywheel direction, which engine is counter rotating?
What/where is the #1, or correct plug wire for setting timing?
As always, thanks.

its my understanding the distributor rotates the same direction as the gears are cut different.

if you google it the firing order will come up for reverse rotation - a little bit in this thread-

https://www.marineengine.com/boat-forum/threads/reverse-engine-timing.412005/?srsltid=AfmBOopN7D-qno1a2TeK2InQpDFHddWO68-2TKEjgrf9E63gYW0N4fi-

sounds like the mechanic didnt know jack chit as the dizzy still goes the same way ... hope he didnt have to pay for that

 

[alldodge]

Depends on which cam was installed, I'm finding where dizzy rotates different and where they rotate the same. Crank the motor and watch the rotor