How does an 1100 breathe?

[DwnSthPlayin]

I fully understand the principles behind how an internal combustion engine works. I own Nitro R/C cars that are two stroke, and I also have owned many cars, so I know the difference in how 2 and 4 stroke engines work. But what I can not seem to find is where my 1100stx gets it air from. I know where the carb is, but I see no air filters to purify the incoming oxygen. Is there not an organized intake system that incorporates a filter of any type?

Thank you in advance for any help.

[boosted-delslow]

Re: How does an 1100 breathe?

I believe the thinking is that there really isnt any dust on the water so you really dont need an air filter.

[Technical Support]

Re: How does an 1100 breathe?

Exactly. PWC don't have or need an actual filter.

[addicted]

Re: How does an 1100 breathe?

The air comes in by a series of ducts under the seat and in the steering tower. It does not need a filter or ducting like a car because there is no dirt on water, and the radiant heat from the engine isn't that bad. All we need is a flame arrestor so that if a backfire occurs through the carb(s) any fuel vapors will be less likely to explode under you.

[DwnSthPlayin]

Re: How does an 1100 breathe?

Thank you. I kinda figured that the "cleanliness" of water was the idea behind a filterless intake, but I just wanted to make sure I was doing a complete PM. Makes perfect sense now. And I see the ducts in the steering tower, as well as under the seat.