Skeg Guard for Select Mercury Outboards | JLM Marine

Skeg Guard for Select Mercury Outboards

The JLM Marine model 1904 is a stainless steel, bolt-on skeg protector for the engine and drive applications identified by the reference checks below. It fits over the skeg below the lower unit to help limit wear. A damaged skeg must retain enough sound material to support the guard and its mounting hardware.

Check Before Ordering

For Mercury 75/90/115 four-strokes, distinguish standard 2.07:1 gearing from 2.38:1 Command Thrust/SeaPro. The latter uses a different reference. Two-stroke and four-stroke applications are not interchangeable.

Reference-Specific Application Guide

The following entries describe the reference manufacturers’ applications. They help identify a candidate; they are not a physical fit test of your lower unit. Do not combine two reference tables into a universal fitment claim. Confirm the engine model suffix, model year, shaft length, gearcase and skeg profile.

Reference 27061

Selected entries from the manufacturer’s current model finder, checked October 7, 2026. Only the years shown are listed; omitted applications require a separate check.

Panther Safe-Skeg Reference 35-SS620

Separately published applications from the Panther guide, March 2026 revision. Each line below retains the guide’s engine details, stroke and year range. “Present” is the guide’s wording and does not automatically verify later model years.

• Mercury/Mariner Outboard 135-150-175-200 Optimax 2 1978-2011
• Mercury/Mariner Outboard 225 2 1978-1995

These are aftermarket reference numbers, not engine-manufacturer OEM part numbers. JLM Marine is an independent aftermarket supplier; the reference brands do not manufacture or endorse this JLM product.

Construction & Package

The model 1904 product photograph is marked “Marine Grade SS316.” The guard has a polished stainless steel finish and mounting holes. The matching kit photograph shows one guard, mounting fasteners, two Allen wrenches and a drill bit. Check the supplied hardware and instructions before installation.

Before Installation

• Keep the engine off and the boat secure. Follow the engine and kit instructions.
• Check the guard profile, seating and mounting position before drilling. Do not force a mismatched guard into place.
• Use the drilling size, fasteners and tightening procedure specified for the actual kit; generic instructions may not apply.
• Do not install on a cracked gearcase or a skeg with insufficient sound material. Ask a qualified marine technician if damage or fit is uncertain.

This guard does not guarantee protection from collisions, restore a structurally damaged lower unit or guarantee improved steering or speed.

Need a Fitment Check?

Email info@jlm-marine.com with the full engine or drive model, model year, serial-number details, shaft length, and clear side and rear photos of the skeg. Include any reference number you are replacing.