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Experienced gardeners share their insights in answering this question :
If you have a manual check that, if not use.030 (standard gap)

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For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
The gap between the electrodes, or the spark gap, is set in order to allow the spark to grow without being defeated by the extinguishing action of the electrodes. In the case of NGK plugs, the gap for motorcycles without a gap symbol is 0.7 to 0.8 mm, and that for automobile plugs is 0.8 to 0.9 mm.
Thread length: 19.0 mm. Electrode gap: 0.6 mm.
NGK Spark Plug BP6ES 7811 (Pack of 8) Wrench size 20.8 mm Thread diameter 14.0 mm Thread Length 19.0 mm Spark gap 0.9 mm.
The Spark-Plug Gap

One of the key factors that makes a spark plug work well, or not, is the size of the gap between the electrodes. If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency.

Many think the larger the gap, the better. However, if the gap is too large, and the ignition system can`t provide the voltage needed to spark across the gap, or turbulence in the combustion chamber blows out the spark, misfires will occur.
Changing the spark plug gap won`t affect the ignition timing, but it will have some affects on the ability of the spark plug to ignite the fuel.
NGK builds two types of iridium spark plugs: OE Iridium and Iridium IX®. Every plug in the Laser Series was designed for an OEM application. All dual precious metal plugs are designed to provide maximum longevity.
As the spark plugs wear, the spark plug gaps widen, also weakening MPG. This is because the wider the spark plug gap, the more voltage is required to arch between the electrodes. The smoother the combustion process, the lower the demand for engine power and the lower the demand for fuel.
While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap.
Gap Size: 0.032 in.
The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy and accelerated plug wear. It is always best to check the gap against the manufacturer`s specifications.
Changing the spark plug gap won`t affect the ignition timing, but it will have some affects on the ability of the spark plug to ignite the fuel.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

What should the spark plug gap be on a weedeater trimmer 25cc
ANSWER : Set it at .025

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I need the spark plug gap for an Ariens ST624E. the spark plug = 21533500
ANSWER : The recommended setting is .030″

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What is the spark plug gap for a NGK BPM8Y – Echo Cs-400 Chainsaws
ANSWER : 20-25 thou which is around 0.6mm

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<!– from fixya rte –>Spark plug gap setting poulan pro 033. – Poulan Pro Prod/Poulan Weedeater Poulan Pro PP5020AV 20" Gas Chain Saw
ANSWER : .025″ plug gap

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Spark plug gap – Toro Lawnmower 20099 Mower Mowers Lawn
ANSWER : Hi campbell7505

.28—-.32

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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

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Spark plug gap – Homelite Mighty Lite Blowervac
ANSWER : Usually about .020

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What type of spark plug and gap? – Makita DCS6401 20 20",64cc Chainsaw 2 Cycle
ANSWER : Autolite XST2974
Autolite 2974
Beru Z260
Beru 14SR-5F
Brisk PR15Y
Champion RCJ6Y
Champion stk 852
Denso W22MPR-U
Denso W20MP-U
Denso 6043
Denso W22MPRU
Denso stk 6023
General Motors 5613726
Iskra FSC75CPR
Motorcraft A22NX
Motorcraft stk 107
NGK BPMR7A
NGK BPMR6A
NGK stk 4626
Torch L7RTC
autolite 2984
Take the fresh cover of cigarette rolling papers for lack of a feeler gauge that helps good enough.

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My name is June Strandberg, and I am a florist and gardener in San Francisco. I have been working in the industry for five years, and I love helping people find the perfect floral arrangement for their special occasions. I am also skilled in troubleshooting and fixing gardening tools, so if you are ever having trouble with your tools, please don't hesitate to reach out to me.