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Tohatsu 30HP 2-Stroke Outboard Engine Parts

(18 products)

This page is tailored for Tohatsu 2‑Stroke 30HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, frequently replaced items, and troubleshooting guidance. You can also browse the main Tohatsu collection for a wider parts selection. Scroll to the bottom of this page to start browsing parts for this engine. 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 30HP Model

  • Nameplate/serial plate location: typically on the transom clamp bracket (port side) or swivel bracket. Record the model code and serial number.
  • Reading the model code: base model (e.g., M30A3/M30A4) followed by suffix letters for shaft length (S/L/XL) and features (electric start, tiller/remote). The suffix can affect parts fit.
  • Platform distinctions: these are carbureted 2‑stroke models; some year changes (“A3” vs “A4”) may have internal updates. Always verify by serial number when parts changed mid‑production.
  • Interchange note: Many Tohatsu 30HP 2‑stroke parts interchange with equivalent Nissan-branded models (e.g., NS30A3/NS30A4) when the model/suffix match.

Engine Overview

Tohatsu 30HP 2‑Stroke

Feature Description
Configuration Carbureted 2‑stroke outboard, manual or electric start, tiller or remote control options.
Common Models Tohatsu M30A3 / M30A4; Nissan NS30A3 / NS30A4 (similar platform; confirm by serial number and suffix).
Advantages Light weight, simple maintenance, strong hole‑shot for small boats and tenders.
Notes Many parts are shared across close year ranges; some components vary with shaft length, start/charge options, and serial‑number breaks. Propeller hub/spline must match your gearcase.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow the official service manual for your exact model, usage, and environment.

Item Interval* Remarks Parts Link
Gear oil (lower unit) Every 100 hours or annually Inspect for water or metal on magnet; reseal if water intrusion is found. Tohatsu Lower Unit Seal Kits
Spark plugs Inspect 50–100 hours; replace 100–200 hours or annually Use correct heat range/gap; fouling indicates rich mixture or oiling issues. Spark Plugs
Fuel filter / inline filter Every 100 hours or annually Replace sooner with stale fuel or debris; add a water‑separating filter if needed. Fuel Filters
Water pump impeller / kit Every 2 seasons or 200 hours (inspect annually) Critical for cooling; replace sooner if weak telltale or overheat alarm occurs. Tohatsu Water Pump Repair Kits
Anodes (sacrificial) Inspect every 50 hours; replace when 50% consumed Choose zinc (salt), aluminum (mixed), or magnesium (fresh) as appropriate. Anodes
Premix ratio / oil injection check Every trip (premix) / annually (injection system) If premix, follow cowl label (commonly 50:1 with TC‑W3). If oil‑injected, inspect tank, lines, and pump calibration. Tohatsu Outboard Parts
Thermostat Inspect annually; replace ~2 years Stuck thermostats cause cold running or overheat; check sealing surface. Tohatsu Outboard Parts

*Intervals are typical for recreational use in moderate conditions; shorten for heavy, commercial, or sandy/silty environments.

Frequently Used Parts Categories

Common Symptoms & Quick Checks

Symptom Check First Related Parts
Weak telltale or overheat alarm Debris on intake screen, pinched hoses, worn impeller, stuck thermostat Water pump repair kit, thermostat, intake screen
Poor acceleration or power loss Prop damage/cavitation, clogged fuel filter, carb settings, old fuel Propeller, fuel filter, spark plugs, carburetor components
Hard starting or rough idle Choke/enrichment operation, plug condition/gap, air leaks, stale fuel Spark plugs, fuel lines/hoses, carburetor gasket/kit
Excessive smoke (2‑stroke) Premix ratio too rich, oil pump setting (if injected), prolonged idling Spark plugs, fuel/oil lines, carburetor jets/needles
Gearcase noise or metal in gear oil Gear oil level/condition, seal leaks (water intrusion), prop shaft fishing line Lower unit seal kit, bearings, seals, gear lube

FAQs

Are parts interchangeable between different years or with Nissan‑branded 30HP models?

Many components interchange across close years and between Tohatsu M30A and Nissan NS30A families. However, suffix changes (e.g., shaft length, start/charge options) and serial‑number breaks can affect fit. Always confirm the full model code and serial number before ordering.

When should I replace the water pump impeller?

Inspect annually and replace about every 2 seasons or ~200 hours. In sandy/silty or shallow use, replace more frequently. Replace immediately if the telltale is weak or you encounter overheat alarms.

How often should lower‑unit gear oil be changed?

Typically every 100 hours or at least once per year. Change earlier after any impact, suspected water intrusion, or submersion incident.

What information do you need to confirm part compatibility?

Please provide the full model code (including suffix letters), serial number, shaft length (S/L/XL), control type (tiller/remote), and whether the engine uses premix or oil injection.

Ready to find parts by horsepower, year, and model? Browse our main Tohatsu collection and use the filters to narrow to your 30HP 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.
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