Air cleaner housings-
For the last month or so where I've been actually using (and abusing) my 169, I've been pretty frustrated at the air cleaner housing arrangement. I know it was the evolution of the design and pre-Quiet Line series that gave the 169 the "quiet" style of air cleaner with the sealed base and the two "breathing holes" that would face opposite the operator. With the speed-up pulley on my 44GT deck, there's quite a bit of wash of dead grass that boils up ahead of the tractor in parts of the yard. To my suprise much of those grass clippings were lodged between the expanded metal and paper element of the air filter.
Back many years ago I embarked on building a custom Cub Cadet. One of the features I decided was a must-have was a pre-cleaner housing. Not wanting something big, black, and gaudy like an infamous <font color="119911">140</font> has, but something that would be something that I could see that IH could have done right out of the parts bin.
I found that the next size larger air filter belonged to the K482/K532/K582 series engines. I purchased a new outter housing, and a "quiet" style base (same part as what the 149 quiet kit would have had). I cut 4 holes in the air cleaner housing to the same porportion as the white-background IH logo, and plug welded a narrow-frame clutch cover over it (the screen style, without the flanges).
My honest worry was air flow, and until this week, never really had the occasion to test it out to see if it works well and if it's a restriction. Turns out it works quite well! My biggest worries of having grass sucked onto the screen and restricting flow were never realized. It wasn't for lack of effort either, I intentionally took the thatcher over the yard so that grass clippings would be in abundance.
I have a red one painted up for the project, and now I've got one in the works to replace the stock housing on my 169.}
Here's before and after shots.