An outboard motor is the beating heart of your boat — whether it’s pushing a tinnie down the Murray or powering a runabout off the Gold Coast, it’s the grunt that gets you going. Buying used can save you a bundle, but it’s a bit like picking a second – hand ute — you’ve got to kick the tyres and peek under the hood to avoid a lemon. In Australia, where salt, sun, and hard yakka take their toll, a dodgy outboard can turn your dream day on the water into a nightmare tow home. At www.runboats.com.au, we’re here to help you snag a ripper deal without getting stung, so let’s dive into what to check before you hand over your cash.
Why Buy Used?
New outboards — think Yamaha, Mercury, or Suzuki — start at $2,000 for a 5hp and climb to $30,000 for a 200hp beast. Used? You might score a 20hp gem for $1,000 or a 50hp workhorse for $5,000. It’s a budget – friendly way to get on the water, especially if you’re pairing it with a boat from our listings. But cheap comes with a catch — wear, tear, and the odd tall tale from a seller. A thorough check keeps you from buying a dud that’s one sputter away from the scrap heap.
1. Visual Inspection: Eyes On, Hands On
Start with a good squiz — looks can tell you plenty.
- Rust and Corrosion: Salt’s a killer in Australia — check the casing, prop, and bolts for rust. A bit of surface stuff’s normal; crusty, flaking metal screams neglect. Coastal motors cop it worse — freshwater use is a bonus.
- Cracks or Dents: Scan the lower unit and skeg (the fin below the prop). Bumps mean it’s hit rocks or sandbars — could spell gear damage.
- Paint and Decals: Faded or peeling? It’s been in the sun — UV ages seals and wiring. Fresh paint over rust? Dodgy cover – up.
- Oil Leaks: Black or milky drips under the cowl? Seals or gaskets might be shot — big bucks to fix.
Grab a rag and wipe around — clean motors hint at care; grimy ones suggest a hard life.
2. Engine Hours: The Odometer of Outboards
Hours tell the story — low is gold, high is a gamble.
- Check It: Newer models (post – 2000s) have hour meters — 50 – 200 hours/year is average for weekend use. A 2015 motor with 1,500 hours? Hammered. Under 500? Sweet.
- No Meter?: Older ones don’t — judge by wear, service history, and seller’s yarn. “Barely used” with a rusty prop? Bull dust.
- Aussie Twist: Coastal motors rack hours fast — Reef runs burn more than lake potters. Ask where it’s been.
3. Service History: The Paper Trail
A logbook’s your best mate — proof it’s been loved.
- What to Look For: Regular oil changes (every 100 hours or yearly), impeller swaps (every 2 – 3 years), and spark plug checks. No records? Risky — assume the worst.
- Red Flags: Gaps in servicing or “I did it myself” with no receipts. Pros use marine – grade oil — DIYers might skimp.
- Salt Factor: Aussie saltwater chews impellers and anodes — check they’re replaced often.
No history? Haggle hard — unserviced motors hide gremlins.
4. Start It Up: Listen and Feel
Fire it up — cold, not warm (sellers might pre – run it to mask issues).
- Cold Start: Should crank in 2 – 3 seconds — spluttering or smoke means trouble. Petrol smell? Fuel mix is off.
- Idle: Smooth, no stuttering — rough idle hints at carb or injector woes.
- Noise: Quiet hum, not a rattle or knock. Grinding? Gearbox grief. Whine? Bearings or impeller.
- Smoke: Blue = oil burning (rings or seals); white = water in fuel (head gasket maybe).
Rev it — smooth power’s a winner; lag or coughs are a pass.
5. Water Test: The Real Deal
Dry land’s half the story — get it wet.
- Hose Trick: Hook a hose to the water intake (flush port or muffs). Water should pee out the telltale in 10 seconds — no stream, no cooling, big problem.
- On the Water: If you can, sea trial it (boat attached or seller’s rig). Full throttle — does it plane quick? Gear shifts smooth? Reverse works? Stalling or bogging down? Walk away.
- Temp: Feel the block after 5 minutes — warm, not scalding. Overheating’s a death knell.
Aussie waters test cooling — salt clogs, sun bakes. No water test? Risk it only if cheap.
6. Prop and Lower Unit: The Business End
The prop and gearbox take the hits — check ‘em close.
- Propeller: Bent blades, chips, or wobble — replaceable ($100 – $500), but haggling ammo. Spin it — stiff means seized bearings.
- Shaft: Straight, no play — wiggle it. Slack’s a sign of worn seals or gears.
- Oil: Drop the lower unit oil (screw at the bottom) — clear amber’s good; milky or black’s bad (water or wear). Smell burnt? Gears are cooked.
Saltwater motors need fresh oil — old stuff’s a red flag.
7. Compression Test: The Heartbeat
Compression’s the pulse — low, and it’s on life support.
- How: Mechanic’s job ($50 – $100) — screw a gauge into spark plug holes. Even readings (e.g., 120 – 150 psi across cylinders) = healthy. One low? Rings or valves shot.
- Why: Shows wear — high – hour motors fade. Aussie heat and salt stress ‘em — 50hp should hold 100+ psi.
- No Test?: Risky — assume rebuild ($1,000 – $3,000) if it’s old.
8. Electronics and Controls: The Brains
Modern outboards have tech — make sure it works.
- Wiring: Frayed or corroded? Salt’s eaten it — rewire’s $200 – $500.
- Throttle: Smooth, no sticking — stiff means cables or linkage need love.
- Tilt/Trim: Electric ones should lift quiet — grinding or slow? Motor or hydraulics failing.
Test every button — dead gauges or trim’s a pain to fix.
9. Seller’s Story: Sniff the Bull
Sellers spin yarns — trust your gut.
- “Ran Last Week”: Prove it — start it cold.
- “Freshwater Only”: Rust says otherwise — coastal use is Aussie norm.
- “New Parts”: Receipts or it’s hot air.
Shifty vibes? Walk — plenty of motors on our site.
10. Price Check: Know the Market
Value’s your leverage — don’t overpay.
- Benchmark: Check www.runboats.com.au — 5hp 2010 Yamaha, $800; 50hp 2015 Mercury, $4,000. Age, hours, brand matter.
- Haggle: Rust, high hours, no history — knock 20 – 30% off. Clean, low – hour gem? 10% wiggle room.
- Extras: Mount bolts, fuel tank, prop included? Sweetens the deal.
Aussie Challenges
- Salt: Coastal motors rust — freshwater’s rare gold.
- Sun: UV fries seals — check rubber bits.
- Use: Reef runs or river dawdles — hours and wear differ.
Final Steps
- Mechanic: $100 – $200 for a pro once – over — worth it for $2,000+ buys.
- Receipt: Get it written — price, condition, “as is.”
- Test Again: Post – deposit, run it hard — refund if it flops.
The Win
Picture this: a $1,500 20hp Yamaha, 300 hours, purrs like a kitten. Paired with your tinnie, you’re fishing the Hawkesbury by weekend — $3,500 saved over new. At www.runboats.com.au, we’ve got the boats and motors — check smart, and you’ll score a beauty.
Final Thoughts
A used outboard’s a gamble — check it right, and it’s a steal; skip the steps, and it’s a sinker. Eyes, ears, and a test run sort the champs from the chumps. Browse our listings, kick the prop, and grab a winner — the water’s waiting, and your motor’s the key.