Tohatsu 16HP 2-Stroke Outboard Engine Parts

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This page is dedicated to Tohatsu 2-Stroke 16HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Tohatsu collection anytime. Scroll to the bottom of the page to start browsing parts for this engine, and remember: on the collection page you can use the Filter & Sort controls to narrow results by horsepower, year range, and part category.

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How to Identify Your 16HP Model

Find the nameplate/serial label on the transom bracket or clamp bracket. It lists the model code and serial number.
Model code suffixes typically indicate shaft length (S=short, L=long), starting method (manual/electric), and control type (tiller/remote).
For 2‑Stroke engines, note whether your engine uses premix or has an oil‑injection system; parts differ for fuel/oil delivery.
Older Tohatsu 16HP two‑cylinder models share many components with the 15/18HP family; verify with your exact model code and serial number.

Platform Overview

Tohatsu 16HP 2‑Stroke (Inline‑2)

Feature	Description
Configuration	Carbureted inline‑2, 2‑Stroke; manual or electric start; short or long shaft variants.
Common Models	16HP two‑cylinder models (often aligned with the M15/M18 family). Check your exact model code for compatibility.
Advantages	Lightweight, simple design, strong low‑to‑midrange torque, easy dockside service.
Notes	Many cooling and gearcase components are shared across 9.9–18HP families. Always match by model/serial and shaft length when ordering.

Routine Maintenance & Service Parts

Intervals below are typical guidelines for small 2‑Stroke outboards. Always follow the official service manual for your specific model and usage.

Item	Interval*	Remarks	Parts Link
2‑Stroke oil / premix	Every tank	Use marine TC‑W3 ashless oil; typical premix 50:1 unless equipped with oil injection. Inspect oil lines/pump if injected.	Tohatsu Outboard Parts
Gear oil (lower unit)	100 hours or annually	Change gear lube; replace drain/fill washers; check for water intrusion. Renew seals if contamination is found.	Tohatsu Lower Unit Seal Kits
Spark plugs	Inspect 100 hours; replace 200 hours or annually	Verify correct heat range and gap for your model. Replace sooner if fouled or misfiring.	Spark plug
Fuel filter / inline filter	Inspect each season; replace as needed	Keep the fuel system clean to prevent lean running and hard starts.	Fuel Filters
Water pump impeller / kit	Every 2 seasons (or sooner in sandy/silty water)	Critical for cooling. Replace if water stream is weak or intermittent.	Tohatsu Water Pump Repair Kits
Anodes (corrosion protection)	Inspect every 3 months; replace when 50% worn	Match anode material to water type (zinc for salt, aluminum/magnesium for brackish/fresh).	Anodes

Frequently Used Parts Categories

Routine Service & Tune‑Up – Tohatsu Outboard Parts
Cooling System – Tohatsu Water Pump Repair Kits
Gearcase & Seals – Tohatsu Lower Unit Seal Kits
Ignition / Electrical – Electrical Items
Fuel System – Fuel Filters
Propulsion – Propellers
Corrosion Protection – Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream or overheat alarm	Inspect tell‑tale outlet for blockage; verify impeller condition; check thermostat and intake screen for debris.	Water pump kit, thermostat, intake screen
Hard starting / rough idle	Confirm fresh fuel and correct premix; inspect spark plugs; check choke/enrichment operation; clean carb jets.	Spark plugs, fuel filter, carb repair components
Poor acceleration / power loss	Check propeller for damage/slip; verify compression; ensure timing/ignition health; look for air leaks on fuel lines.	Propeller, ignition components, fuel hose/primer bulb
Excessive smoke (2‑Stroke)	Confirm mix ratio; ensure correct plug heat range; verify thermostat isn’t stuck open (engine running too cool).	Spark plugs, thermostat, fuel/oil delivery items
Gearcase noise or metal in gear oil	Check gear lube for water/metal; inspect prop shaft for fishing line; pressure/vacuum test and renew seals as needed.	Lower unit seal kit, bearings, thrust washers

FAQs

Are parts interchangeable with other Tohatsu 2‑Stroke models?

Many wear items on the 16HP share engineering with the 15/18HP family (cooling, gearcase, some ignition and fuel components). However, variations by year, shaft length, and start/control options exist. Always match parts by your exact model code and serial number.

When should I replace the impeller?

As a preventive measure, replace the impeller every two seasons, or sooner if you see a weak tell‑tale, overheat warnings, or if operating in sandy/silty water. A full water pump kit is recommended when service history is unknown.

How often should I change lower unit gear oil?

Change gear lube every 100 hours or annually. Inspect for water contamination (milky oil) or metal shavings and address seals or bearings if needed.

What information do you need to confirm compatibility?

Please provide the full model code, serial number, shaft length (S/L), start type (manual/electric), and control type (tiller/remote). A clear photo of the nameplate and the part you’re replacing helps us verify the correct components.

Ready to find parts for your Tohatsu 16HP two‑stroke? Browse the main Tohatsu collection by horsepower, year, and model.

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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.