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Indmar Monsoon 320 engine firing and sparkplug wires order


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Hi All,

This is Jim, I'm new to the forum. I recently bought a 1997 Malibu Echelon with Indmar Monsoon engine 320. The engine is in great shape but it runs rough after 30 minutes.

I have replaced the fuel filter, spark plugs, cap and rotor and it ran good for 40 minutes then the engine makes weird sound like one cylinder is dead. I tried to look online to look for the firing order of my engine so i can trace back the the spark plug wires to see them in the right order or not. I got couple of images but they did not stating front or rear of the engine. I really need help to get the info clearly so i use double check the wires.

Thank you very much!

Jim

 

 

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I found this SB Chevy video but i don't know the engine orientation which side is the fully side or front of the engine. Please point me out.

 

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7 hours ago, njim3 said:

I found this SB Chevy video but i don't know the engine orientation which side is the fully side or front of the engine. Please point me out.

 

In a direct drive boat the transmission is on the aft or rear of engine and the water pumps are on the forward or front of the engine.  Cylinders 1 and 2 are on the front or forward side.
 

In a V drive boat the engine is mounted backwards.

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In a Direct Drive like your Echelon, cylinder # 1 is at the front, observer seat side, or car orientation left front.  # 2 is next to captain chair, distributor at the back of the engine.

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If the firing order is correct, then I'd next look at the coil.  They are known to fail when getting hot when they get old.

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