Engine muffler and air filter

[ApocGoD]

Would taking the muffler off of my lawn mower engine do any good? What about a straight pipe? Also, if I added a larger air filter instead of the dinky stock ones, would that help any?

 

[KieranM]

air filter would more than likely be better than a stock one, As for the muffler its not advisable to run an engine with out one cause its not very good for it, any upgrade you make should help your engine run smoother.

 

[r_chez_08]

if its a lawnmower, i dont expect the neighbours would be happy if you straight pipe it, and it wont do your ears any good. and the hp gains wouldnt be worth it on a lawnmower. if may make it run smoother tho?

 

[solomon]

id straight pipe it and but a muffler at the end that you modified for better flow "cough" "cough" Drilled Holes "cough" "cough"

 

[ApocGoD]

Lol, the engine is going on a go kart. Just spent 4 hours rebuilding it. 12.5 Hp B&S vertical shaft. Running it with no air filter at the moment. (Was clogged beyond my belief) and stock 1 inch muffler.

 

[r_chez_08]

oh, in that case straight pipe it!
and put an air filter on it, like an uni

 

[ApocGoD]

Would putting a mini K&N air filter on it help, or just make it look weird? Or a small carb filter?

 

[r_chez_08]

that would be fine, but how mini is it?

 

[ApocGoD]

that would be fine, but how mini is it?

Not very, i have a filter off a honda civic I found at the junk yard, was going to use it. May have to modificate it though.

 

[r_chez_08]

too small i dont think are good, too big arnt good either- i think

 

[Kaptain Krunch]

Too big shouldnt matter, too small would be bad (restrict airflow and run rich).

 

[modelengineer]

Yeah, don't run your nicely rebuilt engine without a filter or exhaust.

 

[Kenny_McCormic]

Sit that engine on a shelf, in 10 years it will be the last surviving briggs 12.5, they have a horrible tendency to break rods(and destroy the engine in the process).

 

[ApocGoD]

Haha, yeah. Ive been running it at full throttle every so often and im pretty sure its going to blow soon. Thats why im fixing my B&S 26Hp. Mwahahaha. Its going on a mud buggy, 1 seater.