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Johnson 2-Stroke 112HP Outboard Engine Parts

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This page is dedicated to Johnson 2‑Stroke 112HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse our main Johnson/Evinrude/OMC collection. Scroll to the bottom of the page to start browsing parts for this engine, and use the Filter & Sort controls on the collection page to narrow results by horsepower, year range, and part category/section.

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How to Identify Your 112HP Model

  • Locate the nameplate: On most Johnson outboards the model/serial tag is on the top outside edge of the clamp bracket or on the top of the swivel bracket (port or starboard).
  • Read the model code and suffix: Letters typically indicate shaft length (e.g., S/L/XL), steering/control type, and other options, while the suffix can imply model year or revision.
  • Platform hints: 112HP models of this era are 2‑stroke V4 designs. Many cooling and ignition parts overlap with similar V4 horsepower ratings of the same year range, but verify by model number.
  • Record additional details: Note year (approx. mid‑1990s for many 112HP units), gearcase type, and control style to confirm parts compatibility.

Engine Overview

Johnson 112HP V4 2‑Stroke Platform

Feature Description
Configuration V4, carbureted 2‑stroke outboard; typical mid‑1990s Johnson/OMC V4 architecture.
Common Models Johnson 112HP V4 models (often seen circa 1994–1996, including “112”/“112 SPL” variants). Use the exact model code to confirm fitment.
Advantages Strong mid‑range torque, straightforward carbureted service, wide availability of routine maintenance parts.
Notes Cooling, ignition, and gearcase components may share families with other V4 Johnson/Evinrude engines of the same year range; verify by model/serial for guaranteed fit.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 2‑stroke outboards; always follow your official service manual and local operating conditions.

Item Interval* Remarks Parts Link
Gear oil (lower unit) Every 100 hrs or annually Inspect for water intrusion and metal; replace seals if contamination is found. Shop Johnson/Evinrude/OMC Parts
Spark plugs Inspect 50 hrs; replace 100 hrs or annually Use correct heat range and gap; fouling can mask other tune issues. Shop Spark Plugs
Fuel filter / water-separating filter Inspect 50 hrs; replace annually Prevent debris and water from reaching carburetors. Shop Fuel Filters
Water pump impeller / kit Every 2 seasons or 200 hrs Replace sooner if weak tell‑tale, overheating, or sand/silt use. Shop Johnson/Evinrude/OMC Water Pump Kits
Anodes (zincs) Inspect 50 hrs; replace when 50% depleted Match water type (fresh/brackish/salt) and keep paint off contact surfaces. Shop Johnson/Evinrude/OMC Anodes
Thermostat(s) Inspect annually; replace as needed Stuck stats cause cold‑running or overheat; check along with impeller service. Shop Johnson/Evinrude/OMC Parts
Oil injection / premix check (2‑stroke) Each season If oil‑injected, verify pump/lines and alarms; premix engines typically use 50:1 unless otherwise specified by manual. Shop Johnson/Evinrude/OMC Parts

Frequently Used Parts Categories

Common Symptoms & Quick Checks

Symptom Check First Related Parts
Weak tell‑tale stream or overheat alarm Inspect intake screens, tell‑tale hose, thermostat operation, and impeller condition. Water pump kit, thermostat(s), intake screen, anodes
Poor acceleration or power loss Check prop damage/cavitation, fuel quality, carb synchronization/cleanliness, and compression. Propeller, fuel filter, spark plugs, carburetor repair components
Hard starting or rough idle Prime fuel system, verify choke/primer operation, inspect plugs and ignition leads, check for air leaks. Spark plugs, fuel filter, primer/choke components, ignition parts
Excessive smoke (2‑stroke) Confirm premix ratio or oil‑injection output; look for stuck float or rich idle mixture. Spark plugs, carburetor parts, oil injection components
Gearcase noise or metal in gear oil Check oil level/condition, prop shaft for fishing line, and seals for leakage; pressure/vac test if needed. Lower unit seal kit, prop shaft seal, gear oil

FAQs

Are parts interchangeable across different years or V4 platforms?

Many 112HP V4 components overlap with similar mid‑1990s Johnson/Evinrude V4 engines, but ignition, carburetion, and cooling parts can vary by year and suffix. Always confirm using your exact model number.

When should I replace the impeller?

As a rule of thumb, replace the impeller every 2 seasons or 200 hours, and sooner if you notice a weak tell‑tale stream, overheating, or frequent operation in sandy or silty water.

How often should I change lower unit gear oil?

Change gear oil every 100 hours or annually. If oil looks milky or metallic, service seals and inspect internal components before further use.

What information do I need to confirm part compatibility?

Provide the full model number from the clamp/swivel bracket, serial number, approximate year, shaft length, and any options (manual/electric start, remote/tiller). Photos of the nameplate and the part needing replacement are very helpful.

Ready to find parts by horsepower, year, and model? Browse our main Johnson/Evinrude/OMC collection to filter and sort for your exact 112HP V4.

Shop Johnson/Evinrude/OMC Parts

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.
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