Looking for reliable, fuel-efficient mid-range power for your boat? The Tohatsu 115 TLDI (Two-stroke Low-pressure Direct Injection) and the Yamaha 115 (four-stroke or two-stroke) are two of the most respected 115hp outboards in their class. Each brings its own strengths—Tohatsu’s direct-injected 2-stroke packs a punch with light weight and strong acceleration, while Yamaha’s four-stroke models are famous for smoothness, quiet running, and broad support. Here’s a side-by-side guide to help you pick the best outboard for your needs.
Quick Picks
- Best for Acceleration & Weight: Tohatsu 115 TLDI – Lighter, quicker off the line, and ideal for boats where weight matters.
- Best for Smoothness & Quiet: Yamaha F115 Four-Stroke – Ultra-smooth, quiet operation, and low emissions for a comfortable cruise.
- Best for Simplicity & Budget: Tohatsu 115 TLDI – Lower initial cost and straightforward maintenance for DIYers.
Buyer’s Guide
- Engine Type:
- Tohatsu 115 TLDI: Direct-injection 2-stroke. Known for strong hole shot (acceleration), lighter weight, and simple design. TLDI stands for Two-stroke Low-pressure Direct Injection.
- Yamaha 115: Available as the F115 (four-stroke, EFI) and older 115hp two-stroke models. F115 four-stroke is now the standard for most new boats—ultra-smooth, reliable, and very quiet.
- Weight:
- Tohatsu 115 TLDI: About 364 lbs (short shaft), making it one of the lightest 115hp options.
- Yamaha F115 Four-Stroke: About 377–386 lbs depending on model year. Older Yamaha two-strokes are even lighter, but most buyers today focus on the F115 four-stroke.
- Power & Acceleration:
- Tohatsu TLDI: Strong low-end torque and rapid throttle response—classic two-stroke punch, great for skiffs, bay boats, and lighter hulls.
- Yamaha F115: Smoother, linear power delivery—excellent for cruising, watersports, and family boating.
- Fuel Economy & Emissions:
- Both are efficient for their class. The TLDI is much cleaner than old carb two-strokes and comparable to early four-strokes, but the Yamaha F115 four-stroke is even cleaner and quieter.
- Maintenance:
- Tohatsu TLDI: Simpler for DIY work—less complex than a four-stroke but direct injection components can be expensive if they fail.
- Yamaha F115: Requires regular valve checks and oil changes, but parts and support are everywhere.
- Parts & Support:
- Yamaha: Outstanding global dealer and parts network—easy resale and high reliability reputation.
- Tohatsu: Good support, especially in the US and Asia. Some parts may take longer to source for TLDI-specific components.
- Noise & Vibration:
- Tohatsu TLDI: More noise at idle and higher RPM, typical of two-stroke engines.
- Yamaha F115: Exceptionally quiet and smooth—preferred for those who want a peaceful ride.
- Price:
- Tohatsu TLDI: Usually found for less on the used market, with lower initial cost.
- Yamaha F115: Higher resale value and more sought after by buyers looking for four-stroke reliability.
Detailed Product Reviews
1. Tohatsu 115 TLDI
Who it’s for: Boaters who want a lightweight, quick-accelerating outboard—ideal for flats skiffs, bay boats, and hulls where power-to-weight matters.
- Key Benefits:
- Direct-injected two-stroke: light, simple, with a strong punch out of the hole.
- Excellent for shallow-water, fast boats, or remote use where less weight is crucial.
- Lower upfront cost and easier basic maintenance.
- Pros:
- Best power-to-weight ratio in the 115hp class.
- Rugged, simple design compared to four-strokes.
- Good real-world fuel economy for a 2-stroke DI.
- Cons:
- Louder at idle and higher RPM than Yamaha four-stroke.
- Parts for TLDI-specific injection may take time to source.
Final Verdict: The Tohatsu 115 TLDI is unbeatable for light weight and acceleration, with modern emissions for a two-stroke. See Tohatsu 115 TLDI listings
2. Yamaha F115 Four-Stroke
Who it’s for: Boaters who want ultra-quiet, smooth power with low emissions and unmatched reliability—perfect for family cruisers, pontoon boats, and multi-purpose hulls.
- Key Benefits:
- Smooth, quiet, and low-vibration operation at all speeds.
- EFI four-stroke reliability—no mixing oil, simple fueling.
- High resale value and easy parts/service nearly everywhere.
- Pros:
- Ultra-reliable, trusted worldwide.
- Cleaner and quieter than any 2-stroke.
- Perfect for watersports, cruising, and long days on the water.
- Cons:
- Heavier than the TLDI (by about 15–25 lbs).
- More regular maintenance required (valve checks, oil, etc.).
- Higher initial price on the used market.
Final Verdict: The Yamaha F115 is a favorite for those wanting smooth, quiet cruising and ultimate reliability. See Yamaha F115 listings
Comparison Table
| Name | Key Features | Specs / Weight | Price Link |
|---|---|---|---|
| Tohatsu 115 TLDI | 2-stroke DI, light, strong acceleration | 115hp, ~364 lbs, 2-stroke TLDI | See Tohatsu 115 TLDI listings |
| Yamaha F115 Four-Stroke | EFI 4-stroke, ultra-quiet, smooth | 115hp, ~377–386 lbs, EFI 4-stroke | See Yamaha F115 listings |
FAQ Section
- Q: Which is lighter—Tohatsu 115 TLDI or Yamaha F115?
A: The Tohatsu 115 TLDI is about 15–25 lbs lighter than the Yamaha F115 four-stroke. - Q: Which accelerates faster?
A: Tohatsu TLDI has more low-end punch, getting boats on plane quicker—ideal for light skiffs and flats boats. - Q: Which is quieter and smoother?
A: Yamaha F115 is much quieter and smoother at idle and cruise—preferred for family, pontoon, and all-day cruising boats. - Q: Which has lower maintenance?
A: Basic maintenance is simpler on the TLDI (no valves), but Yamaha has a huge support network and regular service is straightforward. - Q: Which has better resale value?
A: Yamaha F115 generally commands a higher resale price, but the Tohatsu TLDI is popular in performance-oriented boating communities.
Conclusion
Both the Tohatsu 115 TLDI and Yamaha 115hp outboards deliver strong, reliable power in a popular size. Choose Tohatsu TLDI if you want lighter weight, quicker acceleration, and simple maintenance. Pick Yamaha F115 for ultra-smooth, quiet cruising, lower emissions, and unbeatable reliability for family and all-purpose boating. Both are excellent engines—just match the outboard to your boat, your needs, and the kind of boating you enjoy most.