Johnson 115HP 2-Stroke Outboard Parts

(47 products)

This page is tailored for Johnson 115 HP 2‑Stroke outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Johnson/Evinrude collection. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the Filter & Sort controls to narrow by horsepower, year range, and part category/section.

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How to Identify Your 115 HP Model

Find the model/serial tag on the top outside edge of the clamp bracket or on the swivel bracket (port or starboard). On many Johnson/Evinrude models it’s a metal plate or sticker with the model and serial.
Reading the code: Johnson model numbers typically start with a prefix like J115, followed by letters for shaft length (e.g., L=20", X=25"), control type, and a year/feature suffix. Record the full code to confirm parts.
Platform clues: 2‑stroke V4 carbureted engines. Earlier variants often use crossflow cylinder design; later models may be loop‑charged. Ignition components, carb count, and covers can differ by platform/year.
Measure shaft length (20" vs 25"). Driveshaft, shift rod, and water pump stack height can vary with shaft length.

Engine Overview

V4 2‑Stroke (Carbureted) – Earlier Crossflow Family

Feature	Description
Configuration	90° V4, crossflow scavenging, carbureted 2‑stroke
Common Models	Johnson 115 HP V4 2‑Stroke models (e.g., J115… with various shaft/control suffixes)
Advantages	Proven design, good parts availability, straightforward service
Notes	Ignition packs, carbs, and cooling components may be year‑specific; confirm by model number before ordering.

V4 2‑Stroke (Carbureted) – Later Loop‑Charged Family

Feature	Description
Configuration	90° V4, loop‑charged scavenging, carbureted 2‑stroke
Common Models	Johnson 115 HP V4 2‑Stroke loop‑charged variants (model codes vary by year/shaft)
Advantages	Improved breathing and efficiency vs. earlier crossflow designs
Notes	Carburetor jetting, reeds, and ignition/charging parts often differ from crossflow models; verify by model tag.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 2‑stroke outboards. Always follow the procedures and schedules in your specific factory service manual.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water intrusion and metal on the magnet; reseal if contamination is found.	Johnson/Evinrude Collection
Spark plugs	Inspect every 100 hours; replace as needed	Use correct heat range and gap; replace fouled or worn plugs.	Spark Plugs
Fuel filter / water separator	Every 100 hours or annually	Replace inline filters; drain/replace water‑separating elements.	Fuel Filters
Water pump impeller / kit	Every 2–3 seasons or 200 hours (inspect yearly)	Replace sooner if weak tell‑tale, overheat, or sand/silt use.	Johnson/Evinrude Water Pump Repair Kits
Anodes (zinc/aluminum/magnesium)	Inspect every 50 hours; replace when 50% depleted	Match anode alloy to your water (salt, brackish, or fresh).	Johnson/Evinrude Anodes
Thermostat inspection	Every 2 years or if overheat/low temp	Ensure proper opening temp; replace gaskets/seals as needed.	Johnson/Evinrude Collection
Oil supply (2‑stroke)	Each fill‑up; annual system check	Use correct TC‑W3 oil; verify premix ratio or service oil‑injection pump/lines if equipped.	Johnson/Evinrude Collection
Carburetor clean/sync	As needed; inspect seasonally	Address varnish or imbalance causing bog/idle issues.	Carburetor

*General intervals; always follow your engine’s official service manual.

Frequently Used Parts Categories

Routine Service: Johnson/Evinrude Service & Maintenance Kits
Cooling System: Water Pump Repair Kits
Fuel System: Fuel Filters
Ignition / Electrical: Electrical Items and Starters
Gearcase / Seals: Lower Unit Seal Kits
Propellers & Hardware: Johnson/Evinrude Propellers
Corrosion Protection: Johnson/Evinrude Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect intake screens for debris; verify impeller condition; confirm thermostat operation.	Water pump repair kit, intake screen, gaskets, thermostat
Poor acceleration or power loss	Check fuel quality and filters; inspect plugs; verify prop pitch/damage; confirm throttle opening.	Fuel filter, spark plugs, carburetor kit, propeller
Hard starting / rough idle	Prime fuel system; check choke/enrichment; inspect plug leads and compression.	Spark plugs, plug wires, carburetor kit, primer bulb
Excessive smoke (2‑stroke)	Confirm correct oil type and mix ratio; check for stuck choke and rich idle mixture.	Spark plugs, carburetor kit
Gearcase noise or metal in gear oil	Drain and inspect gear oil; check prop shaft for fishing line; pressure/vacuum test seals.	Lower unit seal kit, bearings, prop shaft seals

FAQs

Are parts interchangeable between different years or V4 platforms?

Many items are shared, but ignition, carburetion, cooling, and gearcase parts often vary by year, shaft length, and whether the engine is crossflow or loop‑charged. Always confirm using the exact model number from the bracket tag.

When should the water pump impeller be replaced?

Inspect annually and replace the impeller every 2–3 seasons or about 200 hours. Replace sooner after overheat events, sand/silt operation, or a weak tell‑tale stream.

How often should I change lower unit gear oil?

Every 100 hours or at least once per year. Check sooner if you notice shift issues, noise, or milky oil indicating water intrusion.

What information do you need to confirm part compatibility?

Please provide the full model number from the clamp/swivel bracket tag, serial number, shaft length (20"/25"), and any known features (electric start, power trim/tilt). Photos of the nameplate and the part needing replacement are very helpful.

Ready to find parts by horsepower, year, and model? Browse the main Johnson/Evinrude collection and use the filters to narrow to your Johnson 115 HP 2‑Stroke.

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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.