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kevin
03-29-2000, 11:57 PM
FUEL TANK IS BONDED, THOUGHT I WOULD CHECK MY PLUG WIRES AND COMPARE WITH MANUAL, THE INTAKE SAYS 15426378 MY PLUG WIRES ARE ON IN THIS ORDER 1273658 THERE IS A CHANCE THAT I CROSSED 1 PAIR WHILE CHANGEING PLUGS BUT I KNOW WHICH TWO IS THERE A WAY TO FIND THE CORRECT FIRING ORDER FOR A ENGINE THIS INTAKE COULD BE OFF OF SOMETHING ELSE THE ENGINE IS EITHER A 302 OR 289 I AM COUNTING PLUG WIRES AROUND THE DISTRIBUTOR CLOCKWISE STARTING WITH THE POST FACING THE #1 CYLINDER
WHICH IS CONNECTED TO 1. THE BOAT I HAD BEFORE RAN, TIMED OUT AND SOUNDED GOOD (LOW POWER) BUT HAD FOUR PLUG WIRES CROSSED WHEN I BOUGHT IT I DONT THINK THIS IS THE CASE AS THIS ENGINE RUNS GREAT AND HAS ALL SORTS OF POWER BUT I WOULD LIKE TO CHECK THIS OUT A LITTLE CLOSER THANKS

Rob
03-30-2000, 07:45 AM
Be careful using the firing order cast into the manifold. Some (maybe all?) h-m 302's used a cam with a 351W firing order. Depending on when the manifold was cast it could have a different firing order used in original 289's. I have the h-m manual for my 71 hm 302 with the correct firing order, which incidently is the same as my 87 Mastercraft with a 351W (both are standard rotation engines).

I believe all small block fords eventually changed over to this firing order because of a cross firing problem with the original 289-302 firing order.

BillG
03-30-2000, 08:32 AM
All early Ford 221,260,289,and 302 had a 1 5 4 2 6 3 7 8 firing order. The new EFI engines use the 351 firing order 1 3 7 2 6 5 4 8. This was to reduce stress on the front main bearing.

BillG
03-30-2000, 11:51 AM
Instead of all EFI 302's I should have said "82 and up 302HO engines".

Emmo
03-30-2000, 01:06 PM
OMC produced some 302 powered boats in the '70's that had 351 firing orders. The manifolds still had the 302 firing order stamped on them.

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Emmo mailto:emmette@emmette.comemmette@emmette.com</A>