Battery Maintenance Battery Charger Guide | Every Type and Size Explained
AGM, lithium, marine, golf cart or car — match the charger to your battery. Voltage settings, amp ratings and charging times for every type.
Your mower won't start.
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YouTube wastes 8 minutes before showing anything useful. These guides get straight to the fix — fuel, spark and air diagnosis with actual part numbers.
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Battery & Electrical
Wiring diagrams, charging systems and troubleshooting
Battery Chargers
Battery Testers
Battery Tester: Load Testers vs Digital Analyzers Explained 12V Battery Analyzer Guide Spark Plug Tester: How to Test for Spark
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Recent Guides
Battery Maintenance 
Battery Maintenance Lithium Battery Guide | LiFePO4 for Every Application
LiFePO4 lithium batteries for golf carts, RVs, boats, solar and motorcycles. Sizing, wiring, charging and whether the upgrade is worth it.
Emergency Equipment Power Inverter Guide | DC to AC for Tools and Equipment
Size and install a power inverter for running tools, chargers and equipment off your vehicle battery. Pure sine vs modified sine, wattage sizing and wiring.
Lawn Mowers Craftsman Lawn Mower Parts & Repair Guide
Craftsman lawn mower parts and repair guide. Model tables, belt routing, part numbers plus troubleshooting for starting, self-propel and cutting problems.
Lawn Mowers Why Is My Lawn Mower Surging Up and Down?
Fix a surging lawn mower engine that hunts and revs up and down. Clean the carburetor or replace the air filter.
Kawasaki Engine Problems | Small Engine Repair Guide
Fix common Kawasaki small engine problems. Troubleshooting for FR, FS, FX series engines on mowers and equipment.
Repair shops charge $80/hr and a two-week wait. Most of these fixes take 30 minutes in your driveway. Missing a guide? Tell us what broke.