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 Outboard Motor Snorkel		  New Topic  Topic Locked
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Initially Posted - 08/23/2005 :  12:09:46  Show Profile
On my Honda 8HP outboard there is about a 1" hole in the bottom of the engine enclosure on the port side which is used as the air intake for the engine. Its location makes its susceptible to following waves choking off the engine. Has anyone ever rigged a snorkel to circumvent this problem? I know my real problem lies with not having an extra long shaft engine and an adequate engine mount but I thought a snorkel might be a pennywise alternative. Any reason why this might not work? I know they do it on Jeeps and other off-road vehicles. Or maybe plugging the hole and adding a topside cowl vent would be another alternative?
Joe
Joe Wergers
Utopia
Fleet 7/Oceanside, CA
78 C25 FK/SR #381
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 08/23/2005 :  14:34:22  Show Profile
It is feasable to reroute the air intake. I have not seen a "snorkel" though. Most manufacturers try to make the products quiet. More noise would be the likely outcome if you mess around too much with it. If you try, a rubber hose may suffice for a trial run. You would want to make sure the diameter is not too small as this would be the same a running with the choke on. It is an interesting idea though.

Tom.
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JimB517
Past Commodore

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USA
3285 Posts
Response Posted - 08/23/2005 :  21:05:12  Show Profile  Visit JimB517's Homepage
i made an air cleaner for my Honda, it is a lawnmower foam from Home Depot which I shaved down to about 1/8 inch thick. This is kept oiled. The foam is about 1/4 inch greater in circumfrence than the intake, and fits over the air intake and is held on by a wire tie. Its has got to be positioned carefully so as to not interfere with the choke linkage.

Ever since I've done this I've never had a idle jet fouling incident.

If its too thick it won't run right.

Keeping it oiled is the key. I just put a little 10W-40 oil on my fingertip and rub it on every once in a while.
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JimB517
Past Commodore

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USA
3285 Posts
Response Posted - 08/23/2005 :  21:06:11  Show Profile  Visit JimB517's Homepage
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by JimB517</i>
<br />i made an air cleaner for my Honda, it is a lawnmower foam from Home Depot which I shaved down to about 1/8 inch thick. This is kept oiled. The foam is about 1/4 inch greater in circumfrence than the intake, and fits over the air intake and is held on by a wire tie. Its has got to be positioned carefully so as to not interfere with the choke linkage.

Ever since I've done this I've never had a idle jet fouling incident.

If its too thick it won't run right.

Oh yeah, if your electrical connections get wet, pull the wire plugs apart and spray with WD-40, it dries them.

Keeping it oiled is the key. I just put a little 10W-40 oil on my fingertip and rub it on every once in a while.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Response Posted - 08/24/2005 :  01:36:32  Show Profile
Well Jim, if you could make your island trip without having your engine swamped it sounds like you might have the fix. I was under the impression the water was choking off the air supply, but based on your observation it may just be the carb sucking some water. I'll try your remedy and see how it works.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.