Lawn Mower Air Filter Question

I popped the filter cover off my Honda mower, and while there is room to stuff a piece of foam on top of the paper filter, I don't see what good it would do considering there would be gaps between the two filters. Basically, nothing would force the air through the pre-filter. Decided to pass on that idea. While there, I vacuum out the stock filter and put it back. Even with a decently powerful shop vac, using a brush attachment, it wasn't putting undue stress on the filter media. And while on this subject, I hit Amazon for a spare filter, and found a set of four filters for the princely sum of $9. For something like this, I'd normally buy OEM, but these filters have 86% 5-star reviews, and only 1% one star (1186 total reviews). About as good as it gets.
If it's a normal Honda resi motor you have to buy a new deeper filter cover and a spacer thingie. The filter cover will route the air through the prefilter

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Thanks for the part numbers. I bought these and installed them on my mower. The foam filter is quite thin, but it should knock down a fair bit of the debris.
Nice. I'm curious to see how it helps mine. My filter was loaded with a lot of fine dust before I installed the pre filter
 
At this point, I'm about ready to put a K+N filter on my Honda. The OEM Honda filters don't keep out fine dust very well at all. Might as well use a filter I can clean.
 
Nice. I'm curious to see how it helps mine. My filter was loaded with a lot of fine dust before I installed the pre filter
Used my mower for the first time with the new filter, and it ran poorly; uneven idle, surging a little at low speed. Not sure if it's because of the filter or just due to inactivity. I'll have to play with it more to know.
 
Used my mower for the first time with the new filter, and it ran poorly; uneven idle, surging a little at low speed. Not sure if it's because of the filter or just due to inactivity. I'll have to play with it more to know.
Interesting. I actually sold my mower yesterday. I did this back in May to mine. I noticed the exhaust kinda pop a bit which it never did but that was it. It sounds exactly like every commercial Honda I've ever run which is only 4 but no negatives other than that. It ran perfectly fine last mow and yesterday was the first time starting since mid May. Fired up in one pull ran and cut smooth.
 
Interesting. I actually sold my mower yesterday. I did this back in May to mine. I noticed the exhaust kinda pop a bit which it never did but that was it. It sounds exactly like every commercial Honda I've ever run which is only 4 but no negatives other than that. It ran perfectly fine last mow and yesterday was the first time starting since mid May. Fired up in one pull ran and cut smooth.

Fiddled with my mower some more today, and it's running a little better. I don't think the filter is causing issues. My mower was surging at low rpm, in fact, it doesn't like to run at low rpm. Pulled the carb and shot carb cleaner through it. That helped a smig, but it still doesn't like low rpm's. The engine makes a knock sound when running slow. One other disturbing thing is that where the crankcase breather tube plugs into the engine was super dirty, and there was dirt in the port on the engine. I hope the tube wasn't previously loose and now the engine has ingested a ton of dust. That won't be good.
 
Used my mower for the first time with the new filter, and it ran poorly; uneven idle, surging a little at low speed. Not sure if it's because of the filter or just due to inactivity. I'll have to play with it more to know.
OEM filter or other source ?
Run it without the filter and see if it improves. I've had issues with knock off filters in other engines trying to save a few rubles, diesel Gators, being restrictive right out of the box new. Only OEM in them now.
 
Fiddled with my mower some more today, and it's running a little better. I don't think the filter is causing issues. My mower was surging at low rpm, in fact, it doesn't like to run at low rpm. Pulled the carb and shot carb cleaner through it. That helped a smig, but it still doesn't like low rpm's. The engine makes a knock sound when running slow. One other disturbing thing is that where the crankcase breather tube plugs into the engine was super dirty, and there was dirt in the port on the engine. I hope the tube wasn't previously loose and now the engine has ingested a ton of dust. That won't be good.
What mower is this? You might have to clean the idle jet on the carb too b
 
What mower is this? You might have to clean the idle jet on the carb too b
It's a very low-mileage HRX217HYA model with the CCV200 engine. I did a quick spritz out of the carb, but I'll pull it again and do a better job now. That business with the breather really bugs me. So much dust. I'm going to change the oil again just in case some got inside the engine.

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It's a very low-mileage HRX217HYA model with the CCV200 engine. I did a quick spritz out of the carb, but I'll pull it again and do a better job now. That business with the breather really bugs me. So much dust. I'm going to change the oil again just in case some got inside the engine.

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That's the exact same mower I did the air filter mod to. If it's low mileage a lil dirt probably won't hurt but if for sure clean it up and make sure its sealed. I got one of those tools for cleaning carbs with the different size needles. It's a worthwhile too to have to clean these things.
 
At this point, I'm about ready to put a K+N filter on my Honda. The OEM Honda filters don't keep out fine dust very well at all. Might as well use a filter I can clean.
Try gluing the filter inplace with rtv.
My harbor freight stays clean as a watch under its rtv'ed paper air filter.
 
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