Welcome Aboard!

10% savings across all ranges sitewide for new customers · Terms apply

FLASHSALE26

Tohatsu 2-Stroke 8-9.8HP Outboard Engine Parts

(1 products)

This page is dedicated to Tohatsu 2‑Stroke 8–9.8HP 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 Tohatsu collection, and at the bottom of this page you’ll find a quick way 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/section.

Browse All Tohatsu Parts

How to Identify Your 8–9.8HP Model

  • Nameplate/serial plate location: typically on the transom clamp bracket or the swivel bracket—note the full model code and serial number.
  • Reading the model code: look for designations such as M8 or M9.8 plus suffixes for shaft length (S/L/XL), tiller vs. remote, and start type (manual/electric). Suffix letters often indicate year or revision.
  • 2‑Stroke identifiers: choke/primer on the carburetor, premix labeling, and no crankcase oil filter. Many 8–9.8HP models run 50:1 fuel/oil premix—verify in your owner’s manual.
  • Platform differences: 8HP and 9.8HP variants share many components; jets, timing, or minor hardware may differ. Use your exact model and serial for parts confirmation.

Platform Overview

Tohatsu 8–9.8HP Two‑Stroke (Small Twin)

Feature Description
Configuration Lightweight inline twin, carbureted 2‑stroke with manual or electric start options.
Common Models M8, M9.8 series across late 1990s to 2000s variants (short/long shaft, tiller/remote).
Advantages Very portable, simple to service, strong low‑speed thrust for small boats and tenders.
Notes Many service items interchange between 8HP and 9.8HP; verify by model/serial. Confirm premix ratio (often 50:1) and shaft length. Gearcase and water pump parts can vary by serial break.

Routine Maintenance & Service Parts

Intervals below are general guidelines; always follow the official service manual for your exact model and operating conditions.

Item Interval* Remarks Parts Link
Gear oil (lower unit) 100 hours or annually Drain/inspect for water or metal; use marine gear lube and new gaskets on plugs. Tohatsu Outboard Parts
Spark plugs 100 hours or annually Check heat range and gap; replace if fouled or worn. Spark Plugs
Fuel filter (inline) 100 hours or each season Replace more often with ethanol fuel or if debris is present. Fuel Filters
Water pump impeller / kit Every 2 seasons (or sooner in sandy/silty water) A weak tell‑tale stream or overheat alarm suggests impeller wear. Tohatsu Water Pump Repair Kits
Anodes Inspect every 50 hours; replace at ~50% depletion Choose zinc (salt), aluminum (brackish), or magnesium (fresh) as appropriate. Anodes
2‑Stroke fuel/oil mix or oiling system check Every use (mix); seasonal inspection (hoses/primer) Most run 50:1 TC‑W3 premix; if equipped with oil tank/lines, inspect for leaks and correct flow. Tohatsu Outboard Parts
Lower unit seals (if water in gear oil) As needed Milky oil indicates seal service; inspect shift/prop shaft seals and drain/fill plug gaskets. Tohatsu Lower Unit Seal Kits

Frequently Used Parts Categories

Common Symptoms & Quick Checks

Symptom Check First Related Parts
Weak tell‑tale stream or overheat alarm Inspect intake screen for blockage, verify thermostat operation, and check impeller condition. Water pump kit, thermostat, intake screen, gaskets
Poor acceleration or power loss Confirm fresh fuel and correct premix; check fuel filter, primer bulb, and prop damage; inspect spark plugs. Fuel filter, fuel pump, spark plugs, propeller
Hard starting or rough idle Verify choke/primer function, clean carburetor, and set idle mixture per manual; inspect plugs and leads. Spark plugs, carburetor kit, gaskets
Excessive smoke Check oil ratio (avoid over‑oiling), confirm thermostat closure, and ensure correct idle mixture. Spark plugs, thermostat, carb gaskets
Gearcase noise or metal in gear oil Inspect prop shaft for fishing line, check oil for water, and examine drain/fill plug magnets. Seals, bearings, drain/fill plug gaskets

FAQs

Are parts interchangeable between 8HP and 9.8HP models or different years?

Many service items are shared across these two‑stroke platforms, but serial breaks, shaft length, and start/control options can change specific components. Always confirm with your model code and serial number before ordering.

When should I replace the impeller?

As a preventive measure, replace the impeller every two seasons (or sooner in sandy/silty water) and immediately if you notice a weak tell‑tale or overheat indication.

How often should I change the lower unit gear oil?

At least once per season or every 100 hours. Inspect the drained oil for milkiness (water intrusion) or metal; either condition warrants further diagnosis and seal inspection.

What information helps confirm part compatibility?

Provide the full model code, serial number, shaft length (S/L/XL), tiller vs. remote control, manual vs. electric start, and the estimated year range. Photos of the nameplate and the part needing replacement are also helpful.

Ready to find parts by horsepower, year, and model? Browse our main Tohatsu collection and use Filter & Sort to narrow to your exact 8–9.8HP two‑stroke.

Shop Tohatsu Outboard 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.
View as
Back to top

Compare /5