Whether you’re new to boating or a seasoned skipper, your Yamaha outboard engine is the heart of your adventure on the water. But even the most reliable outboard can run into problems if not used or maintained correctly. In this post, we’ll highlight 7 common mistakes people make with Yamaha outboard engines—and how to avoid them to ensure long-lasting performance and safety.
⚠️ 1. Neglecting Regular Maintenance
The mistake: Many boat owners wait until there’s a problem before checking their engine.
Why it matters: Just like a car, your outboard needs regular checkups to stay in peak condition.
Avoid it by:
- Changing engine oil every 100 hours or once a year
- Replacing spark plugs and fuel filters regularly
- Checking for corrosion, especially after saltwater use
- Scheduling annual servicing with a certified Yamaha technician
Pro Tip: Use Yamaha’s official maintenance schedule as your guide.
⚠️ 2. Using the Wrong Fuel or Oil
The mistake: Filling your engine with low-quality fuel or incorrect oil types.
Why it matters: Contaminated or improper fuel can lead to poor performance, starting issues, or long-term engine damage.
Avoid it by:
- Always using fresh, ethanol-free gasoline (if possible)
- Adding a fuel stabilizer when storing your boat for long periods
- Using Yamalube® 4M or 2M depending on your engine model
⚠️ 3. Improper Flushing After Use in Saltwater
The mistake: Forgetting to flush the engine after running in saltwater.
Why it matters: Saltwater is corrosive and can damage the cooling system if left unflushed.
Avoid it by:
- Flushing your outboard after every saltwater trip
- Using Yamaha’s built-in flush port (with the engine off!)
- Letting water run for 5–10 minutes to clear salt and debris
⚠️ 4. Running the Engine Without Water
The mistake: Starting the engine “dry” without cooling water.
Why it matters: Outboards rely on water for cooling. Running it dry can burn out the impeller within seconds.
Avoid it by:
- Never starting your engine unless it’s submerged or connected to a flush hose
- Installing a kill switch or reminder tag when dry storing
⚠️ 5. Ignoring the Propeller
The mistake: Overlooking damage or wear on the propeller.
Why it matters: A damaged prop reduces fuel efficiency, causes vibration, and can harm your lower unit.
Avoid it by:
- Checking the propeller for nicks, bends, or fishing line
- Removing the prop once in a while to grease the shaft and inspect seals
- Replacing worn props with a Yamaha-approved size and pitch
⚠️ 6. Storing the Engine Incorrectly
The mistake: Leaving your outboard in poor conditions during the off-season.
Why it matters: Bad storage = corrosion, fuel system gumming, and battery drain.
Avoid it by:
- Storing upright in a dry, shaded area
- Draining fuel or using a fuel stabilizer
- Removing the battery and keeping it charged
- Covering with a breathable Yamaha engine cover
⚠️ 7. Buying from Untrusted Sellers
The mistake: Purchasing Yamaha outboards from unauthorized or questionable sources.
Why it matters: You risk buying a fake, refurbished, or stolen engine with no warranty support.
Avoid it by:
- Always purchasing from certified Yamaha dealers like Yamaha7man.com
- Checking for a valid serial number and documentation
- Avoiding deals that seem too good to be true
✅ Bonus Tips to Keep Your Yamaha Running Smooth
- Keep a maintenance logbook for oil changes, services, and parts.
- Install a water-separating fuel filter to protect against moisture.
- Read your Yamaha outboard owner’s manual—it’s full of gems!
Final Thoughts
Your Yamaha outboard is built to last—but only if you treat it right. By avoiding these common mistakes, you’ll extend your engine’s lifespan, boost performance, and save money in the long run.
Need genuine Yamaha parts or help choosing the right engine? Contact us at contact@Yamaha7man.com or browse trusted products on Yamaha7man.com.