Small Engine Tools
Free calculators and diagnostic tools for small engine repair.
Engine Won't Start Troubleshooter
Answer a few questions to narrow down why your engine won't start.
Most Likely Cause:
2-Stroke Oil Mix Calculator
Calculate the correct oil amount for your fuel mix ratio.
Oil Needed:
Repair Cost Estimator
Estimate typical repair costs for common small engine services.
Estimated Cost:
Actual costs vary by location and specific equipment condition.
Quick Reference: Spark Plug Gaps
Briggs & Stratton
0.030" (most models)
Honda
0.028" - 0.031"
Kohler
0.030" (most models)
Tecumseh
0.030"
Stihl 2-Stroke
0.020"
Echo 2-Stroke
0.025"
Always verify with your specific model's manual.