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Boats & Marine
Owner-level guides for boats and outboards. Marine DC systems can deliver very high current, and improper marine wiring can cause shock and fires — follow ABYC practices or hire a certified marine electrician.
Common problems
- Worn raw-water impeller causing overheating
- Weak battery or charging problem
- Water in the gearcase (milky gear oil)
- Fuel left untreated over the off-season
Related guides
guide
Battery & Charging System Diagnosis
Figure out whether a weak start is the battery, the alternator, or a connection problem using a $20 multimeter.
Beginner · 30–45 minguideEngine Overheating: What to Check
Temperature gauge climbing? Here's how to stay safe and narrow down the cause from coolant to fan to thermostat.
Beginner–Intermediate · 30–90 minguideOutboard Motor Winterization
Protect a 2- or 4-stroke outboard over the off-season: fuel, flushing, fogging, gear oil, and storage.
Beginner–Intermediate · 1–2 hrs