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SI have riding mower with 18.5 hp briggs engine,started blowing oil out the vent on the fuel pump. took hose off of carb and it stopped. smoking a lot, checked oil level and it was good, what's up ?

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Posted on Jan 02, 2017

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xclubcar98x
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SOURCE: Briggs & Stratton Vertical OHV Engine 18 hp

Check your oil.

If it is overfilled, milky, or smells like gas. Your going to need to change that ASAP. It sounds like the float has stuck in the past or is still sticking, and it has flooded the crankcase with gas, which has mixed with the oil. And because it is overfilled it comes through the breather hose into the carb. This also explains the smoke most probably because the oil is spewing in the carb through the breather and being burned.

Posted on Jul 05, 2011

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bgduff366
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SOURCE: craftsman riding mower 2003 DLT 3000 ,Blowing oil out of the fuel

Head gasket is blowed .Its building pressure in the crankcase seen it twice. Remove the head and check for a blowed out spot between piston and the valve side

Posted on Jul 29, 2012

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SOURCE: Engine starts but won't stay running

an easy way to know that is to start engine and give it a shot of starting fluid ,if you can keep it running by this method I would replace diaphragm.

Posted on Jun 21, 2009

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I have a huskee lt4200, engine is a 420cc OHV.


Check for gas contamination in the oil....if the oil itself it gas free....its likely a blown headgasket.

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Briggs & Stratton 16HP carb small hose purpose? Have a Snapper riding mower with 16HP Briggs & Stratton16 HP V-TWIN OHV Vanguard, Model 303777 Type 1145-A1 4750 Code 97021011. It started...


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To clean the carb you will have to remove it from the engine and give it a through cleaning with small diameter wires run through the ports and blowing out the gunk with low pressure air or WD40's little red tube. From your description, you need to do this as the ports are clogged and not letting proper amounts of fuel through to the engine.

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If it is overfilled, milky, or smells like gas. Your going to need to change that ASAP. It sounds like the float has stuck in the past or is still sticking, and it has flooded the crankcase with gas, which has mixed with the oil. And because it is overfilled it comes through the breather hose into the carb. This also explains the smoke most probably because the oil is spewing in the carb through the breather and being burned.

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I have A craftsman riding mower 18 1/2 hp 42 inch deck have changed spark plugfuel filter took off tank and blowed it out but the mower still cute off after about 10 minutes like it has no gas what else...


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