Best Lightweight 115 HP Outboard Replacement Parts for Easy Upgrades
When targeting the best lightweight options for 115 HP outboards, the focus is on parts that minimize weight while preserving or improving reliability and performance. The following five products are chosen for their relevance to 115 HP Mercury and Yamaha/MERCURY-compatible engines, their compact design, and straightforward installation. This guide helps buyers decide which lightweight option suits their needs—whether for maintenance, performance tweaks, or weight-sensitive boat setups.
| Product | Target Engine/Use | Why It’s Lightweight | Best For |
|---|---|---|---|
| GHmarine 68VW0078 Water Pump Impeller Kit | Yamaha 75–115 HP 4-stroke | Compact water pump impeller kit designed for lighter Yamaha outboards | Lightweight maintenance and reliable cooling for Yamaha 115 HP motors |
| DB Electrical Starter for Mercury | Mercury Outboard 115–175 HP | Replacement unit with a compact DD starter design | Lightweight ignition system replacement |
| Caltric Stator for Mercury Outboard 115 HP | Mercury 115 HP 2-stroke | Lightweight stator with compact mounting footprint | Electrical system reliability with minimal weight impact |
| 8M0088351 Voltage Regulator for Mercury/JET | Mercury 65–115 HP EFI | Small, streamlined regulator unit designed for easier fit and lower mass | Electrical regulation with limited extra weight |
| EfforPrac Outboard Water Pump Impeller | Mercury 115–225 HP (Replaces 47-89984T4, 47-30221) | Six-blade design in a compact housing for efficient cooling | Better cooling with minimal weight addition |
GHmarine 68VW0078 Water Pump Impeller Kit
The GHmarine water pump impeller kit is designed for Yamaha 75–115 HP four-stroke motors. It replaces the 68V-W0078-00-00 and related numbers, ensuring a compact fit with standard Yamaha cooling systems. Best for owners seeking a lightweight, straightforward impeller replacement that keeps engine temperatures in check during normal operation. A potential limitation is that compatibility is focused on specific Yamaha models, so verify exact engine year and horsepower before purchase.
DB Electrical Starter for Mercury Outboard
This starter is designed for Mercury outboards in the 115–175 HP range. It emphasizes a compact, streamlined construction that minimizes weight while delivering reliable cranking power. Best for boaters who need a lighter-weight, direct replacement to reduce overall engine bay mass. Limitation: the listing provides a broad compatibility range, so confirm the exact OEM numbers on your model to ensure proper fit.
Caltric Stator for Mercury Outboard 115 HP
The Caltric stator is listed for Mercury 115 HP 2-stroke models from 1994–2006. It comes in a lightweight configuration suitable for replacing a failing stator without adding unnecessary weight. Best for maintaining electrical performance with minimal mass. Caution: verify part number variants and appearance to ensure compatibility with the exact Mercury model year.
8M0088351 Voltage Regulator
Compatibility covers Mercury and EFI variants within the 65–115 HP range. The regulator is designed to be compact, minimizing extra weight while maintaining electrical output stability. Best for those upgrading an outboard’s electrical system without adding bulk. Limitation: confirm exact OEM part numbers (8M0088351 or 8M0133642) and engine year to ensure accurate replacement.
EfforPrac Outboard Water Pump Impeller
The EfforPrac water pump impeller is designed for Mercury engines from 115 to 225 HP, replacing OEM 47-89984T4 and 47-30221. It uses a six-blade design to improve water flow and cooling efficiency, with a compact housing that keeps weight down. Best for ensuring consistent cooling in demanding conditions. Limitation: verify the exact engine year and model to guarantee six-blade configuration matches OEM specs.
Buying Guide: Key Purchase Considerations
Weight-conscious buyers should evaluate the following when choosing lightweight outboard replacements for 115 HP engines:
- Engine compatibility: Ensure the part is listed for your exact engine make, model, and year to avoid fitment issues.
- Weight versus performance: Focus on parts that reduce mass without compromising reliability, such as compact starters, regulators, and impellers with high-efficiency designs.
- Electrical system compatibility: For stators and regulators, verify the electrical output and mounting arrangements match your engine’s requirements.
- Material and corrosion resistance: Marine-grade materials that resist salt exposure help maintain weight benefits over time.
- Installation notes: Some parts require specific torque specs or gaskets; ensure you have the proper tools and, if needed, professional installation.
FAQ
- Q: Are these parts suitable for all 115 HP Mercury engines?
- A: Compatibility depends on the exact model and year. Always verify part numbers and engine specs before purchasing.
- Q: Do lightweight parts affect reliability?
- A: Replacements designed for compatibility and proper fitment typically maintain reliability; choose OEM-equivalent or reputable aftermarket parts.
- Q: Will a lighter starter improve performance?
- A: A lighter starter can reduce overall engine bay weight, which may indirectly improve handling, but does not directly increase horsepower.
- Q: How do I verify fitment for a Yamaha 115 HP motor?
- A: Check the specific Yamaha model year, horsepower, and the part’s listed compatibility or replacement numbers.
- Q: Should I replace multiple components at once?
- A: If multiple components show wear or failure risk, replacing them together can improve reliability and prevent repeated service occurrences.