Working calculators
Carburetor Parts Cost MathRebuild vs replace decision for small engine carbs. Compression Test InterpretationWhat your engine\'s PSI reading means.Guides
Carburetor diagnosis: won't start vs runs rough vs won't idle, and the systematic float-bowl testThe three symptom patterns and what each means, step-by-step float bowl inspection, float height adjustment, idle mixture tuning, and rebuild vs replace math.Plain note about money: Some links are affiliate (eBay Partner Network). Small commission, doesn't change your price.
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Carburetor rebuild kitBriggs & Stratton and Tecumseh carbs are the most common. A rebuild kit (jets, needle, float, gaskets) costs $8-15 and fixes 80% of no-start issues.
Compression testerA compression tester confirms if a no-start is fuel, spark, or mechanical. 90 PSI is the minimum for most small 4-stroke engines.
Spark plug socket set5/8-inch and 3/4-inch cover almost all small engine plugs. A magnetic socket holds the plug for thread-start in tight engine compartments.
Fuel line and primer bulb kitFuel line hardens and cracks after 2-3 seasons. Universal 3/32 and 1/8 inch ID line covers most chainsaws, trimmers, and blowers. Replace primer bulb at the same time.
Ignition coil (universal)A failing coil causes intermittent or no spark. Aftermarket coils from Rotary or Oregon work reliably on most Briggs, Tecumseh, and Kawasaki engines.