Mercury 30 HP Rope & Electric Start Trim Tilt Long Shaft Outboard Motor

The Mercury FourStroke 30 ELH PT EFI is a 4-stroke outboard marine engine designed for small fiberglass, aluminum, or inflatable boats requiring a long shaft, measuring 2.5–5 meters, with a 30 HP / 22.1 kW, 500 cc 3-cylinder engine. The FourStroke 30 ELH PT EFI, with its 500 cc EFI FourStroke engine, offers economical and reliable power to users of small and medium-sized boats.

FourStroke 30 ELH PT EFI Series Features and Technology Advantages

The 3-cylinder design provides balanced power with a compact and lightweight structure. EFI injection ensures reliable starting without the need for a manual fuel system.

• 3-Cylinder Engine (500 cc): The 3-cylinder design provides balanced power with a compact and lightweight structure.
• Long Shaft (508 mm (20")): The propeller operates at optimal depth with the correct transom height.
• EFI Electronic Injection: No primer pump required — automatic fuel system filling before turning the key.
• Electric Start: Instant engagement with a key or button — comfortable and quick starting.
• Gas-Assisted Tilt: Allows the engine to be lifted with light hand force — a mechanical alternative to an electric system.
• 25 Liter Internal Tank: Sufficient capacity for medium-distance routes; option for external tank connection.

Long Shaft — What Boat Type is it Suitable For?

The long shaft (508 mm (20")) is suitable for the vast majority of inflatable, aluminum, and fiberglass boat models. For boats with a transom height of 381 mm, a short shaft model should be preferred.

Technical Specifications

Who is this Engine For?

• 2.5–5 meter small and medium-sized boats: economical EFI power
• Fishing and coastal use: quiet 4-stroke operation
• Inflatable boats and RIBs: lightweight engine and balanced thrust
• Auxiliary engine: access to reliable Mercury service network

Maintenance and Longevity

4-stroke Mercury engines run trouble-free for many years with regular oil changes and end-of-season maintenance protocols. The impeller of the water-cooled system should be checked every 100 hours or two seasons. In saltwater use, freshwater flushing is mandatory after each use.

Related maintenance categories: Maintenance Kit | Engine Oil | Impeller | Mercury Spare Parts

Frequently Asked Questions

What boat size does the Mercury FourStroke 30 HP engine fit?

30 HP power can fit different sizes depending on boat weight and type. General rule: 15–20 kg boat weight per HP. Always check the maximum engine power recommended by the boat manufacturer.

What advantage does the EFI system offer over a carbureted engine?

EFI (Electronic Fuel Injection) does not require a primer pump or choke adjustment. It provides reliable starting in cold weather and high altitudes, consistent power output, and lower fuel consumption compared to carbureted alternatives.

What are the maintenance intervals for Mercury FourStroke?

Oil change at the first 20 hours, then oil change every 100 hours or once a season. Impeller check every two seasons. Freshwater flushing is mandatory after each use in saltwater. End-of-season fuel system protection is recommended.

Which boat and inflatable boat brands are compatible with the FourStroke 30 ELH PT EFI?

Mercury outboard motors are compatible with many fiberglass, aluminum, and inflatable boat models thanks to their universal stern clamp or transom mounting system. The only criteria are your boat's 508 mm (20") transom height and the maximum engine power approved by the manufacturer. You can get compatibility confirmation from Clever Marin by sharing your boat model.

Related Products and Categories

• Mercury Outboard Motors
• Mercury Marine Products
• Mercury Spare Parts
• Mercury 2.5–30 HP FourStroke
• Mercury 40–60 HP FourStroke
• Outboard Motors
• Boat Engines
• Maintenance Kit
• Impeller
• Anode

Is This the Right Configuration for Your Boat?

Share your boat model, transom height, and intended use — let's confirm the suitability of the Mercury FourStroke 30 ELH PT EFI engine for your boat and the correct shaft selection together.