Most "dead" outboards we see aren't dead. They're telling you exactly what's wrong, in beeps, codes and warning horns, and most people just never got the chart.
These guides collect what our techs check first: alarm and beep codes, overheating at idle and at speed, fuel trouble after a winter of sitting, impellers, oil capacities and honest maintenance intervals. If your motor is talking to you, start with the beep code guide. If it's saying nothing at all, start with the won't-start guide.
When a guide points to a repair beyond a driveway fix, book it at hbw.wiki/service and we'll get you on the schedule. One note before you plan: the marina is closed December 1 to April 1, so anything you find over the winter gets booked for a spring slot.
23 guides in this collection.
Start here
- Mercury Outboard Beep & Alarm Codes: What Each Means - Continuous beep, 4 beeps every 2 minutes, or a key-on alarm on your Mercury outboard: what each pattern means, what to check first, and when to stop the motor.
- Mercury Alarm Codes List Ontario - Mercury alarm codes explained: SmartCraft SYS FAULT, warning horns, the correct owner's manual, and why dismissing an alarm doesn't fix its cause.
- Mercury Outboard Won't Start (Ontario Dealer Guide, 2026) - Mercury outboard won't start? Ontario dealer's honest diagnostic ladder: battery, fuel, ignition, EFI. Ethanol-free fuel available at HBW.
- Read Mercury Outboard Serial Number - A practical guide to finding, reading, and decoding your Mercury outboard's serial number, model year, shaft length, features.
- How to Trim a Boat With a Mercury Outboard: Read the Boat, Not Just the Gauge - Learn how to trim a Mercury outboard for planing, cruise, turns and rough water. Read speed, RPM, steering and spray instead of guessing on the water.
All Diagnostics & Maintenance guides
- Mercury Outboard Maintenance Parts List: Filters, Plugs, Kits and Part Numbers (2.5 to 600 HP) - A guide to common Mercury outboard maintenance parts: filters, spark plugs, impellers, gear lube and service kits. Check your model and serial number for fitment.
- Mercury Outboard Repair Guide: Troubleshooting and Maintenance - Troubleshoot Mercury outboard starting, overheating, alarm and power-loss problems, with service intervals and honest DIY-or-dealer guidance.
- Mercury Outboard Oil Capacity Chart: Model and Year Lookup - Search Mercury FourStroke crankcase and gearcase capacities by horsepower, year, displacement, serial break and engine family, from 2.5 to 600 HP.
- Mercury Outboard Fault Codes: Legacy VesselView and Modern UFC Lookup - Search Mercury fault codes by format and engine family, including legacy VesselView IDs and the current V6/V8 UFC table checked against dealer literature.
- The Complete Guide to Boat Bilge Pumps: How They Work, Why They Fail, and How to Fix Them - The complete guide to boat bilge pumps: how the pump, float switch, and wiring work together, why they really fail, how to size and test one, and when professional...
- Mercury Outboard Overheating at High Speed: What to Check - Mercury overheating at high speed? Learn which cooling-system faults a technician checks, how to respond to the warning, and when to stop for service.
- Five Boat Problems That Get Expensive When You Keep Running - Five Mercury outboard warning signs Ontario boaters should not run through, plus the safe response and service details that support a sound diagnosis.
- When to Replace a Mercury Impeller: 12 Years of Shop Data - When to replace a Mercury outboard impeller, plus 12 years of HBW parts records showing when water-pump work reaches the shop.
- Mercury Overheat Alarm Decoder: Beep Meanings - Mercury overheat alarm? Decode every pattern, what triggers Guardian mode vs. limp home. Ontario dealer guide to troubleshooting overheat alarms on Mercury.
- The Five-Minute Boat-Trailer Check Before Every Trip - Check your boat trailer before every trip: coupler, chains, restraints, tires, wheels and lights, using current Ontario and manufacturer guidance.
- Mercury Spring Run-Up Checklist - Boring spring checks prevent expensive May surprises. A Mercury Premier dealer's step-by-step run-up checklist for Ontario boaters opening up their boat.
- Boat Electrical Safety Ontario - Marine electrical safety checklist for Ontario freshwater boats: corrosion, fuses, bilge pump, battery switch, amateur wiring traps.
- Mercury Outboard Maintenance: 100 and 300 Hours - Most current Mercury FourStrokes are serviced every 100 hours or annually. Learn what an early check, annual service, and model-specific 300-hour service mean.
- Mercury Overheating at Idle Fix - Mercury outboard overheating at idle but fine at speed: diagnostic flow for water pump impeller, intake debris, thermostat, sensors.
- Mercury Overheating Emergency Guide - A Mercury Premier dealer's emergency-and-prevention guide for outboard overheating: what to do in 60 seconds, what to check at the dock.
- DIY Mercury Outboard Winterization - DIY Mercury outboard winterization: identify the exact model procedure, prepare fuel and gearcase, protect the battery, and know when to stop.
- Mercury Boat Battery Guide Ontario - Marine battery guide for Ontario boaters: types, switches, wiring, winter storage, and spring startup so you're not stranded on the May long weekend.
- Mercury Motor Seasonal Care Ontario - Seasonal Mercury maintenance for Ontario: spring checks, 100-hour or annual service, model-specific fall storage, and expanded 300-hour work.
All blog guides