Spark plug removal

[David Huskisson]

I have a 2006 50hp Mercury 4 stroke. With my previous boat I took out the spark plugs and fogged the cylinders in the fall. This new motor appears to have an ignition coil for each cylinder. I am thinking you need to remove these before you can remove the spark plugs. I am not sure about that and don't want to screw anything up on a brand new boat. Any suggestions on proper removal of the plugs?

 

[05GlastronSX]

Re: Spark plug removal

yes you do need to remove the coils in order to remove the spark plugs but if i were you, id take it to the dealer and have them do all of the maintenance until your warranty period is up. That way, if something were to go wrong on your engine while it is still under warranty, Mercury has no choice but to fix it and cant void it due to improper maintenance.

 

[Scaaty]

Re: Spark plug removal

Another reason why I refuse to buy anything new anymore. Old 2 strokes blow the doors off the heavy 4S anchors they are selling now.....

 

[David Huskisson]

Re: Spark plug removal

Yeah, I think your right, I should let the dealer winterize the new boat to preserve the warranty. Thanks!!!

 

[DJ]

Re: Spark plug removal

I'd go back to the dealer too. Feel free to ask them what they do.

That 4S is a different animal than a carbed 2-S. If it's EFI there may be other issues that come into play besides just fogging.

 

[Texasmark]

Re: Spark plug removal

One thing for sure. If you do the plugs, don't over tighten them. Growing up I probably ripped out 2 or 3 sets of threads in cast aluminum heads before I realized that you just snug em up. When you get that sharp rise in resistance, stop!

Mark

 

[Texasmark]

Re: Spark plug removal

On the separate coil. I was looking at the Son-in-laws Surburban some time ago and noticed just that; individual coils. Now seems all engines have them.

Anyway I thought it was counter productive for Detroit to do 8 of something they used to only do 1 of in the interest of simplification, cost management, and assembly ease.

But then it dawned on me.....with separate coils, you don't need the distributor and you can do it all electronically so you can manage your combustion and max your performance and min your emissions......makes sense.

So I guess outboards are doing that also in their 4 cycles.

Mark