Welcome Aboard!

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

FLASHSALE26

Sears 2-Stroke 6-15HP Outboard Marine Engine Parts

(2 products)

This page is tailored for Sears 2‑Stroke 6–15HP outboard engines. Use it to find compatible parts, routine service intervals, and troubleshooting guidance. Because many Sears small outboards cross‑reference to Force by Mercury, you can also browse the main Force 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.

Browse All Force Parts

How to Identify Your 6–15HP Model

  • Locate the nameplate/serial plate: typically on the transom bracket (port side) or under the engine cowl. Photograph the full label.
  • Decode the model suffixes: shaft length (S=15", L=20"), tiller vs. remote controls, and production year or revision letter.
  • Platform clues: many Sears 9.9/15HP units from the late 1990s share Force‑by‑Mercury components; cowl shape and lower unit water inlets often match Force/Mercury designs.
  • 2‑Stroke specifics: confirm whether your engine uses premix (commonly 50:1) or has an oil‑injection pump to ensure correct service parts and procedures.

Engine Platform Overview

6–8HP 2‑Stroke (small twin)

Feature Description
Configuration Carbureted 2‑stroke, inline twin, water‑cooled; simple rope or electric start variants.
Common Models Sears/Force 6–8HP equivalents; Mercury/Mariner small twin families (late 1980s–early 2000s).
Advantages Lightweight, easy to transport, straightforward maintenance, good trolling manners.
Notes Cooling‑system parts (impeller kits, wear plates, gaskets) often align with Mercury/Force 6–8HP families—verify by serial plate before ordering.

9.9–15HP 2‑Stroke (twin‑cylinder)

Feature Description
Configuration Carbureted 2‑stroke, inline twin, water‑cooled; manual or electric start, short/long shaft variants.
Common Models Sears/Force 9.9 & 15HP (many late‑1990s units), Mercury/Mariner 9.9–15HP of the same era.
Advantages Strong low‑end push for small boats, simple carb service, broad parts availability via Force/Mercury cross‑references.
Notes Water‑pump service kits and many gearcase components commonly interchange across Mercury/Force 9.9–15HP families; confirm by serial number and gearcase style.

Routine Maintenance & Service Parts

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

Item Interval* Remarks Parts Link
Lower unit gear oil Every 100 hrs or annually Inspect for water intrusion (milky oil) and metal fines; renew seals if needed. Force Lower Unit Seal Kits
Spark plugs Inspect every 50 hrs; replace 100 hrs/season Use correct heat range and gap; carry spares for cold starts/trolling. Spark Plugs
Fuel filter / inline filter 50–100 hrs or annually Replace more often with ethanol fuel or if debris is observed. Fuel Filters
Water pump impeller / kit Every 2–3 seasons (annually in silt/sand) Weak tell‑tale or overheat alarm indicates service; renew housing if scored. Force Water Pump Repair Kits
Anodes (zincs) Inspect 25–50 hrs; replace when 50% consumed Match material to water type (salt, brackish, fresh). Anodes
Carburetor clean/rebuild As needed for rough idle or storage issues Stale fuel can varnish jets; replace gaskets/needles when servicing. Carburetor
2‑Stroke oil system / premix Pre‑use checks; every service Verify premix ratio (often 50:1) or test oil‑injection pump and lines for leaks/air. Hoses & Lines

*Intervals assume normal recreational use; shorten for heavy use or harsh conditions.

Frequently Used Parts Categories

Common Symptoms & Quick Checks

Symptom Check First Related Parts
Weak tell‑tale stream / overheat alarm Inspect intake screen for blockage; check impeller condition and thermostat; verify anodes aren’t dislodged. Water pump repair kit, pump housing/plate, thermostat, intake screen
Poor acceleration / power loss Check for fouled plugs, clogged fuel filter, dirty carb jets, and damaged prop. Spark plugs, fuel filter, carburetor kit, propeller
Hard starting / rough idle Prime fuel system; verify choke/enrichment operation; test spark and plug gap; look for air leaks in fuel lines. Fuel filter, fuel hoses, spark plugs, electrical components, carburetor kit
Excessive smoke (2‑stroke) Confirm correct premix ratio or oil‑pump setting; ensure thermostat allows engine to reach operating temp. Hoses/lines, carburetor kit, thermostat
Gearcase noise / metal in gear oil Drain oil; inspect for water ingress; check propshaft seal and bearing play. Lower unit seal kit, shims/bearings, gear oil

FAQs

Are parts interchangeable across Sears, Force, and Mercury 6–15HP models?

Many cooling‑system and gearcase components do cross‑reference between Sears‑branded engines and Force/Mercury 6–15HP families (especially late 1980s–early 2000s). Always confirm by serial number, shaft length, and gearcase style before ordering.

When should I replace the impeller?

Every 2–3 seasons under normal use, or annually if you run in sandy/silty water. Replace sooner if the tell‑tale weakens, the housing is scored, or you’ve overheated the engine.

How often should I change lower unit gear oil?

At least once per season or every 100 operating hours. Check more frequently after prop strikes or if the engine sits for long periods. Milky oil indicates water intrusion and the need for seal service.

What information helps confirm part compatibility?

Provide a clear photo of the nameplate/serial label, the full model and serial number, shaft length (15"/20"), control type (tiller/remote), and any known year range. Photos of the lower unit and cowl help identify the platform.

Ready to find parts by horsepower, year, and model? Browse the Force outboard collection commonly used on Sears‑branded 6–15HP engines.

Browse All Force 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