27hp Kohler pro

[walker45]

Just purchased a Scag Tiger Cat with 27hp Kohler command pro with 34 hours, when the engine is at idle it sounds like it rattles almost like a shield is loose when you up rpms to mow it goes away. I have had all Kawasakis before is this the nature of these, don't know what this means if you just block off any of the exhaust it goes away. Does this sound like an issue.

[ringahding]

Check to see if there are bolts loose or missing on the exhaust mount.

[walker45]

I did doesn't seem to be all seems tight

[Restrorob]

Broke loose baffle inside the muffler is my guess, With the muffler cold of course bump on it with the palm of your hand and see if it rattles....

[walker45]

I'm just worried its something inside engine is there a way to verify baffle is bad

[Restrorob]

Check my edit....

[walker45]

Ok if not that do you think something is wrong with the engine.

[walker45]

I took a small threaded rod and ran up into muffler seems to go away has anyone ever repaired one that is loose and if not where is the best and economical place to purchase a replacement

[FryDaddy]

The baffles in muffler are broken & moving around. Just cut the end open & remove broken baffles and then re weld exhaust back together. This is what I did with my 27 Kohler.
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[walker45]

Does the engine require a certain amount of backpressure, so it shouldn't harm the engine if baffles are removed