OEM Air Filter question..

**jeepjeff** · 08-04-2018, 11:41 AM

On my 212 with the Kohler 12 HP (K301AQS) the John Deere part number, M47494, is a paper filter.

My question is why doesn't the OEM filter include a pre-filter like around 90% of all other engines do?

**RetiredDoc** · 08-04-2018, 12:59 PM

Just a guess.

1. Cost saving to Deere.

2. Foam pre-filters are supposed to be reusable - wash it and lightly re-oil it. Doesn't everyone do this instead of installing a new pre-filter every time the paper filter is replaced?

My bet is that (1) is the reason, and (2) is the Deere company public response if asked.

**jeepjeff** · 08-04-2018, 01:39 PM

Guess I should have said that I ordered one with a pre-filter since there wasn't one (pre-filter) on the machine when I got it. I just feel better with one and wanted to make sure using the thing wouldn't screw something up due to air/fuel mixture type things.

**rydplrs** · 08-04-2018, 02:24 PM

A pre filter is preferred, but being washable they have a longer life then the paper ones. Many people are also too cheap to buy both and do it right.

**jgayman** · 08-04-2018, 02:44 PM

Originally Posted by jeepjeff

Guess I should have said that I ordered one with a pre-filter since there wasn't one (pre-filter) on the machine when I got it. I just feel better with one and wanted to make sure using the thing wouldn't screw something up due to air/fuel mixture type things.

I like the foam pre-filter. I kept one from an old filter so each time I service the machine I swap to a fresh foam pre-filter and wash the old one. The paper inner filter stays clean and I avoid any build up of debris on the outer filter. I swap pre-filters 4 times or so before changing the paper filter.

**jeepjeff** · 08-04-2018, 05:18 PM

You all just eased my mind a bit.

On the bright side I did do a little painting of the shrouds and hood (top pic is the day I got it). And yes, that is a reflection of the variable speed knob in the hood.