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air filters for 720's
- Thread starter seadoobie
- Start date
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Here's a link to K&N......http://store.knfilters.com/marine/personalwatercraft.htm
Should work for boats also.
Lou
Should work for boats also.
Lou
Dr Honda
Well-Known Member
Don't change them.
Your stock airbox can flow more air than the stock carbs can flow. (as long as it's clean) Also... it provides the proper resistance for the way the carbs are tuned. Even "Factory Pipe" recommends leaving on the stock airbox with their pipe. (and they get 20 more HP out of that engine) also... aftermarket filters don't offer a noticeable HP gain by themselves. (they support power from other mods)
If you put on a less restrictive air filter... you will have to re-tune your carbs. Most likely drop your pop-off pressure, but you may need to enrichen your main circuit.
Lastly... the stock airbox provides great resistance to water ingestion. A K&N filter will drink every drop of water that hits it.
Your stock airbox can flow more air than the stock carbs can flow. (as long as it's clean) Also... it provides the proper resistance for the way the carbs are tuned. Even "Factory Pipe" recommends leaving on the stock airbox with their pipe. (and they get 20 more HP out of that engine) also... aftermarket filters don't offer a noticeable HP gain by themselves. (they support power from other mods)
If you put on a less restrictive air filter... you will have to re-tune your carbs. Most likely drop your pop-off pressure, but you may need to enrichen your main circuit.
Lastly... the stock airbox provides great resistance to water ingestion. A K&N filter will drink every drop of water that hits it.
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I totaly agree with Dr Honda,
What you actually have on your boat now are flame arrestors, they provide very little filtering, so unless you are using your boat under extreme conditions, ie dust, air polution, etc. the stock flame arrestor should be fine. Plus I don't know how the K&N filters act as flame arrestors. Generally I feel that SeaDoo knows more about building ski's than I do so I leave it stock. Like I use to tell my kids when I rebuilt my Corvair "it's not the way GM (in this case SeaDoo) intended it".
You asked the question so I answered it.
Lou
What you actually have on your boat now are flame arrestors, they provide very little filtering, so unless you are using your boat under extreme conditions, ie dust, air polution, etc. the stock flame arrestor should be fine. Plus I don't know how the K&N filters act as flame arrestors. Generally I feel that SeaDoo knows more about building ski's than I do so I leave it stock. Like I use to tell my kids when I rebuilt my Corvair "it's not the way GM (in this case SeaDoo) intended it".
You asked the question so I answered it.
Lou
Last edited by a moderator:
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