Spark plugs foul immediately

Check the gap between flywheel and coil

Yes, black smoke is too rich, blue is oil and white is steam/condensation.

Surging is normally caused by air entering the inlet manifold or governor.

All Carburetors have adjustment
Needle height
Main Jet size
Idle Jet air control (often hidden under a silver disc).

surging

https://www.google.com/search?q=18hp+Briggs+and+Stratton+surging

Carburetor adjustment

https://www.google.com/search?q=18+hp+briggs+and+stratton+carburetor+adjustment

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Question edited for clarity.
Question moved to a Briggs Generator category.

Engines only need 3 things to run.

Compression
A spark and the right time
Fuel

When you try and start, remove the plug and see if it is wet with gas? You may have a blocked carb jet.

Check compression.

https://www.google.com/search?q=Briggs+%26+Stratton+model+19E412+type+1131-E1+that+will+not+start

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How to Gap a Spark Plug - YouTube

? 2:57
https://www.youtube.com/watch?v=IuW3svdqKZM
Oct 15, 2012 - Uploaded by ChrisFix
How to correctly gap a spark plug. This is a fast and easy video on how to gap a spark plug and spark plug gap ...

FAQ: Find My Engine Spark Plug & Gap ' Briggs & Stratton

www.briggsandstratton.com/.../identifying-the-correct-s...

Briggs & StrattonFollow this step-by-step image guide to locate spark plugs in different Briggs & Stratton engine types. ... Spark Plug Type & Gap Chart for Briggs & Stratton Engines. Now that you've found the part you'd like to replace, you can use the chart below to identify the genuine Briggs & ...

Spark Plug Gap - AutoZone

bad coil it will seem like a fuel issue and the spark will look fine threw the spark plug but with a real spark tester you will see it is a yellow spark instead of blue replace coil and thank me

Yes, the low oil pressure shutdown switch would cause the problem.

Have you also changed the spark plug too. The ignition circuit is pretty simple, from the battery, the Coil is energized, the "points" or equivalent, through the "Distributor" or equivalent, and onto the Spark Plug. So it is a simple matter to work along the path, proving the "Integrity" at each, point by testing. IF it still doesn't fire after ensuring all Leads are OK, the Spark Plugs are proven OK, the Cables, the Points, & Distributor, . IT is either that or the Ignition Timing is OFF. Please check all those points.

Carburetor cleaner will ruin the rings and do that.

Check engine oil.

Remove wire from low oil sensor and the start.

Replace low oil sensor.

Hope this tip help solve your problem.

r/David

Specifics on engine needed, brand, model, type, code, serial numbers. Thanks, rwvanlue
try the things below to see if they help

1) How have you determined that there is no spark?
2) Have you used a type of spark tester?
3) What is the condition of the plug. Brown or dark brown is OK. Black or silver is NOT Ok.
*If you do not have a spark tester,
a) remove the plug, and with it connected to the wire,
b) find a portion of metal around the cylinder that you can ground it on, and then pull the rope.
c) If the plug is black, you may see spark, but you should replace the plug.

*** PLEASE NOTE ; if there is excess fuel in the cylinder or on spark plug,
it can catch fire, so be carefull to cover the hole with a heavy rag so that any fuel
cannot be exposed to spark plug durning test !!!!
Get back with me on how this issue works out.
thanks, rwvanlue


I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae