oks fine, I ran it on another engine no problem.I’m tired of cranking so I put my1/2hp drill on the crank it starts and run fine,exept for a few backfires.I put put handcrank back on=no start!help
Briggs & Stratton
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If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead. If your ignition start or push button start needs replacing, consult a Briggs & Stratton dealer near you.
Disconnected, dirty or fouled spark plugs are common causes for engines that won`t start. For small engines, spark plugs typically need to be replaced every season or after 25 hours of use. You should also check to make sure the spark plug gap is set correctly.
Spark issues are the most common symptoms of failing stators, known as “Misfiring.” If you haven`t already known, stators are directly responsible for producing the required spark for your spark plug. Once they malfunction, the motorbike will receive insufficient – or worse, zero – sparks.
A: This spark plug should have a gap set to 0.02 inches.
If the ignition coil does not have spark, it`s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
Broken, damaged or corroded wire. Timing. Improper spark plug gap. Faulty ignition coil.
Common armature gap ranges are . 006 – . 010″ and . 010 – .
The ohmic resistance of the coil is around 0.2–3.0 Ω on the primary side and around 5–20 kΩ on the secondary side. The winding ratio of primary to secondary winding is 1:100. The technical structure may vary depending on the ignition coil`s area of application.
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Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
If the ignition coil does not have spark, it`s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
Spark plug incorrectly tightened, engine cooling problem, ignition timing too early, spark plug heat range too low, severely abnormal combustion.
If the ignition coil does not have spark, it`s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
Spark plug incorrectly tightened, engine cooling problem, ignition timing too early, spark plug heat range too low, severely abnormal combustion.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
Briggs=stratton Hi, got 5hp briggs, with eratic starting, just put a new coil in it,sometime got sparks sometime not.pulled the plug out, it looks fine, I ran it on another engine no problem.I’m tired of cranking so I put my1/2hp drill on the crank it starts and run fine,exept for a few backfires.I put put handcrank back on=no start!help
I need the spark plug gap for a MTD mower model # 11A038A729. It has a Briggs 12M902 0451 E1. Thanks.
ANSWER : The proper gap is ..030″ Here is the Briggs application chart for L-Head engines like yours.
http://www.manddsmallengine.com/briggs/info/plug7.html
I need the spark plug gap for an Ariens ST624E. the spark plug = 21533500
ANSWER : The recommended setting is .030″
Chainsaw stalls Chainsaw is 4 years old and has a history of moderate use. After I ran the saw about 1 minute on plain gas (grabbed the wrong gas can – ouch) the chainsaw sputtered and stopped.
It didn't seize, and the pull starter never became more or less difficult than normal. The engine would continue to start if I pressed the prime bulb and engaging the choke, but stall again after 10-20 seconds. The temperature that day was about 50 degrees F and I was running the saw with the “cold plug” installed (per warm weather running).
When it refused to keep running I did the following:
Flushed the fuel tank (that's when I saw the gas had no oil in it).
Ran hardware wire through all of the fuel lines.
Replaced the fuel filter and spark plug.
Cleaned the air filter with a nylon brush and compressed air.
Same behavior (start then stall in less than 20 seconds). I made at least 20+ attempts to start it.
I removed the carburetor and, though it looked perfectly clean, I took off the top and bottom covers then sprayed everything with automotive carb cleaner and blew out the passages with compressed air. The gasket and diaphragm looked new. No pinholes in the diaphragm when held against a bright light. I reinstalled the carb but got the same behavior (start then stall in less than 20 seconds). I again made at least 20+ attempts to start it.
I disassembled the short block and saw that the piston has some slight scoring on it. The ring is clean and I verified that the piston ring has .001 clearance between it and the piston ring groove all the way around with the ring held tightly in place (I was thinking that the piston might have become deformed if it did indeed get too hot when run without any oil premix).
The cylinder wall has no scoring and there isn't any signs of melted aluminum anywhere. The crank is clean as was the inside of the crank cover.
I reinstalled the crank cover using permatex non-hardening gasket goop and torqued the cover bolts to 10 inch pounds. I reassembled everything else per the exploded diagrams in Echo's “parts manual” for the CS400.
During assembly I took note that both the carb gasket and intake boot look like new.
Still the same result: press prime bulb once, engage choke, pull a few times and it starts but stalls after 10-20 seconds.
I'm stumped.
ANSWER : Not sure what to say other than its fuel starvation, if not already done replace the fuel filter in the tank, if no better i would suspect a massive air leak, so replace the crank seals, if there is no primary compression in the crankcsae fuel will not pull through the engine, good luck.
What Gap for spark plug on 3.5 hp engine? – Briggs & Stratton Briggs Stratton Lawnmower Lawn Mower Short Block
Honda gx200The water blaster just stopped and I change the spark plug but still only a very small spark that is when it sparks?Coil buggered?
ANSWER : Very small spark okay as long as its blue and not bright yellow.try using starting fluid if runs might want to see if carburetor is getting fuel.
No spark on a 126T020675B2 Briggs 6.75 hp mower engine
ANSWER : Gap needs to be 10 thousands of a inch done with a brass feeler gauge ..mag/flywheel has a spot with a magnetic field if you look you can see it it should make a 1/2 wrench stick to it if not replace mag/flywheel ..check key way also
Briggs and stratton 130212 3198 01
ANSWER : Gabe:
The gap will be 0.035″ to 0.040″ The wider the gap, the hotter the spark. If your magneto is good and strong, forty thousandths of an inch will work.
