Makita muffler plugs

[Colonel 428]

I've got a 7900 and 6100 that have both had a plug fall out of the front of their muffler. Should I replace them? I know the plugs are cheap but I'd really like to know if they are necessary or not (back pressure, spark protection, noise reduction)? Thanks, Steve.

 

[Wilhelm]

If You are referring to the plugs that cover the mufflers bolt holes - You do not need those!

Just in case You "want" to replace them they are identical on both the 6100 and 7910 - part number 038174451

Those plugs contribute only to the saws overall weight, no performance gain or loss whatsoever.
The original/initial models, Dolmar PS-6400/7300/7900 & Makita DCS6401/7301/7901, never had them - or at least mine did not.
You are perfectly safe/fine running Your saws without those bolt hole plugs!

And one more thing, we need pictures of those saws!

 

[FederalQ]

The bolt hole covers along with the spark arrestor screen may be USA only requirements. And yes, photos!

 

[Colonel 428]

Thanks gentlemen. Honestly, I've never even looked closely at what's at the other end of the open holes those plugs cover . I'll work on some pictures as soon as I can.

 

[Wilhelm]

Two muffler bolts are at the bottom of those holes, Torx.