Johnson 2-Stroke 55HP Outboard Marine Engine Parts

(33 products)

This page is for Johnson 2-Stroke 55 HP outboard engines. Use it to find compatible parts and key service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Johnson/Evinrude collection. Scroll to the bottom of the page to start browsing parts for this engine, and on the collection page use the Filter & Sort controls to narrow results by horsepower, year range, and part category.

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How to Identify Your 55 HP Model

Locate the model/serial plate on the top outside edge of the clamp bracket, or on top of the swivel bracket (port or starboard).
Model codes and suffixes typically indicate details such as shaft length, electric start vs. manual, and control type (tiller or remote). Use the full model code to confirm parts.
This is a 2‑stroke platform. Many models use a 50:1 fuel/oil mix; some later units may have oil‑injection — verify which system your engine has.
Across the 55 HP range (late 1960s into early 1990s), configurations vary by year; some were inline‑2, others inline‑3. Always match parts using the exact model designation.

Engine Overview

Feature	Description
Configuration	Carbureted 2‑stroke (inline twin or inline triple depending on year), manual or electric start, tiller or remote control.
Common Models	Johnson 55 HP outboard models spanning approximately the late 1960s through the early 1990s.
Advantages	Light weight, simple to service, strong mid‑range torque, plentiful parts availability.
Notes	Confirm model number for carburetor/ignition specifics. Use 50:1 premix unless your engine is factory oil‑injected. Gearcase components and prop hubs may vary with year and shaft length.

Routine Maintenance & Service Parts

Intervals below are general guidelines. Always follow the procedures and schedules in your engine’s official service manual.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water intrusion/metal. Service seals if contamination is found.	Lower Unit Seal Kits
Spark plugs	Inspect at 50 hours; replace ~100 hours or annually	Use correct heat range and gap per manual; carry spares.	Spark Plugs
Fuel filter / in‑line strainer	Every 100 hours or each season	Replace if restricted; check primer bulb and hose condition.	Fuel Filters
Water pump impeller/kit	Inspect annually; replace ~2 seasons or 200 hours	Replace sooner if telltale is weak or after sandy/silty use.	Water Pump Repair Kits
Anodes (zinc/aluminum)	Inspect every 50 hours; replace at ~50% wear	Choose material for your water type (fresh/brackish/salt).	Johnson/Evinrude Anodes
Propeller & hardware	Check each outing	Inspect for dings and bent blades; monitor for hub slippage.	Johnson/Evinrude Propellers
2‑Stroke oil supply / fuel mix	Before each outing	Most carbureted models use 50:1 premix; if oil‑injected, inspect oil tank, lines, and fittings regularly.	Johnson/Evinrude Hoses

Frequently Used Parts Categories

Routine Service & Maintenance Kits — Shop Kits
Cooling System (impellers, wear plates, gaskets) — Shop Water Pump Kits
Gearcase & Seals — Shop Lower Unit Seal Kits
Fuel System (filters) — Shop Fuel Filters
Ignition / Electrical — Shop Electrical Items
Propellers & Hardware — Shop Propellers
Corrosion Protection — Shop Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak telltale or overheat alarm	Clear intake screen; inspect telltale hose; verify impeller and thermostat condition.	Water pump kit, intake screen, thermostat, gaskets, anodes.
Poor acceleration or power loss	Check prop damage/hub, fuel quality and filters, spark plugs, and carburetor synchronization.	Propeller, hub hardware, fuel filter, spark plugs, carburetor repair kit.
Hard starting or rough idle	Prime fuel system; verify choke/enrichment; inspect for air leaks at hoses and fittings.	Primer bulb, fuel hoses/clamps, carb kit, spark plugs.
Excessive smoke (2‑stroke)	Confirm correct fuel/oil ratio; replace fouled plugs; verify choke is not stuck on.	Spark plugs, fuel lines, carb gaskets, air silencer seals.
Gearcase noise or metal in gear oil	Check oil level/condition; inspect for water intrusion and prop‑shaft seal damage (fishing line).	Lower unit seal kit, bearings, carrier/driveshaft seals, fresh gear lube.

FAQs

Are parts interchangeable between different 55 HP years or platforms?

Many maintenance items interchange within certain year ranges, but carburetor components, ignition parts, gear ratios, and water pump bases can differ by model and production year. Always confirm using the exact model number from your nameplate.

When should I replace the impeller?

Inspect annually and replace about every two seasons or 200 hours. Replace sooner if the telltale weakens, the engine runs hot, or after heavy sand/silt use.

How often should I change the gear oil?

Change every 100 hours or annually, and any time you see water contamination or after a suspected underwater strike or submersion.

What information do you need to verify parts fitment?

Please provide the full model number (and serial if available), year, shaft length, and control/start type. The model plate is typically on the top outside edge of the clamp bracket or on the top of the swivel bracket.

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If you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.