B&S Engine starts but won't run

Briggs & Stratton one cylinder OHV Model 185432 Simpson Pressure Washer

Not used for 9 years. Starts on first pull and runs as long as I keep spraying gas on the air filter.

Cleaned carburetor (blew with compressed air). Bowl was clean, carb seems spotless. Does not seem to be anything to take apart on this one-piece casting except for what seems to be an air jet accessible from the top.

Any ideas on what might be going on? Carb bowl always full. Needle float valve seems to be in very good condition.

Thanks for any and all suggestions.

Ivan Vegvary

Reply to
Ivan Vegvary
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The main jet in the bottom of the carb is plugged. 99.99%

Reply to
clare

My first thought is that it is gummed-up with varnish and other gasoline products. There is a product called "Gumout" carb ceaner that has worked well for me many times.

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Reply to
Tom Gardner

If there's gas in the bowl and it's not reaching the intake something is plugged, whether you can see it or not.

If no better ideas come up I'd try dunking the casting (disassembled as far as it'll go) in a pot of Pine-Sol on a hotplate outdoors. It's a fairly aggressive treatment, if you have access to an ultrasonic cleaner that would be a good, cautious first step. Boiling Pine-Sol etches zinc rather harshly, removing galvanizing from steel and leaving brass jets pink. It'll likely do the same to zinc-based die casting alloys. A little etch might be ok, a lot is apt to be destructive.

I used this method on carbs for a Suzuki SV650S and it cured a rough slow running problem very neatly, at the cost of removing all the surface zinc on both jets and brackets.

hth,

bob prohaska

Reply to
bob prohaska

Yep. The gas plugs the holes in the fuel pick up tube and the main jet.

Reply to
Steve W.

+1. Most people don't run the engine out of fuel before storage, and the old fuel varnishes up the jets as it dries.

Chances are good that the pump didn't get a douche of pump protectant way back when, either (Most people forget that.) so the chances of a failed pump are pretty high.

Reply to
Larry Jaques

Get a 1 or 5 gal bucket ($25-$200) of Berryman's Carb Dip. Strip and dip the carbs. Gumout works for gooey, but doesn't work at all for hardened deposits. Ditto my fave carb cleaner, Berryman's B-12 Chemtool. It's great, but not good enough for hardened crap. Hmm, looking at the SDS on both, I think the Greenies killed CarbDip. Maybe the Chemtool is the better of the two now, and Gumout tried to copy Chemtool.

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In any case, for you, Gunner, you'll likely have to import anything which will actually work. The R O Kalifornia bans the good stuff.

Reply to
Larry Jaques

THANK YOU everybody. Took off carb one more time thinking that the bowl fastener probably functions also as a gas inlet. (I've seen that before ) Wrong! But I found a tiny,tiny jet perpendicular to the gas flow that was plugged. A sewing needle and a hammer unclogged it, and the machine purrs rather nicely Thank you for pointing me to 'supply' problem. Ivan Vegvary

Reply to
Ivan Vegvary

A dine wite. like used on tags, poked up the jet dets the jod ctarted, then dode the fuel with B-12 or Sea Foam and run on choke untill the jet clears.

Run ethanol free (generally premium) fuel - treated with SeaFoam particularly for storage - and run the carb cry for long term storage.

Reply to
clare

I've seen this:

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--jsw

Reply to
Jim Wilkins

How's that??

Reply to
clare

Greenies wherever there is any copper content - including brass jets. Greenies plug jets. Hooch absorbs water too - when things cool off you get phase separation - which leaves water in the bottom of the tank and float bowl - which rusts out the tank or float bowl eventually - and makes it hard to start the engine on the short term. Water doesn't burn very well.. The hooch is hard on some fuel lines and gaskets too

- as well as diaphragms in "regulator" carbs.

I've run across more than one instance of every one of these - not on MY equipment mind you - I stay clear of ethanol fuel for small engines (and airplanes)

Reply to
clare

a strange feel - with a couple of previously mashed pinkies thrown in.

Reply to
clare

AvGas is hooch free, but has several times more lead than the old Sunoco 260. Marinas usually have hooch free mid grade.. Any airport with mo-gas for STC will be hooch free.

Reply to
clare

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The lead content will ruin your catalytic converter if you put it in a car.

Reply to
Jim Wilkins

Better. But 'Effin New Electron, like FNG?

Reply to
Larry Jaques

We can't help the half-light or old mashers, but if you get a new keyboard with the nibs still on F and J, that should help.

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$13.59, delivered! I should get one myself. Me nibs're gone, too.

Reply to
Larry Jaques

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