Quicksilver 2-Stroke 35HP Outboard Engine Parts

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This page is for Quicksilver 2‑Stroke 35 HP outboard engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection for a wider range of compatible components. Scroll to the bottom of the page to start browsing parts for this engine, and on the collection page use the Filter & Sort controls to narrow results by horsepower, year range, and part category/section.

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How to Identify Your 35 HP Model

Find the serial/model plate on the transom bracket or swivel bracket. Note the full serial range for accurate parts matching.
Decode suffixes (shaft length, tiller vs. remote, electric start). These affect items like gearcase seals, shift components, and wiring.
Confirm it’s a 2‑stroke 35 HP: carbureted intake, oil‑injection tank or premix operation. Premix vs. oil‑injected models can use different hoses and fittings.
Measure shaft length (15" short vs. 20" long). Cooling and gearcase parts (impeller key, driveshaft seals) can vary with gearcase style.

Engine Overview

35 HP 2‑Stroke Class Overview

Feature	Description
Configuration	Inline‑2, carbureted 2‑stroke with reed‑valve induction; premix or oil‑injected depending on model.
Common Models	Typical 35 HP 2‑stroke outboards in this class (short/long‑shaft, tiller or remote control, pull or electric start).
Advantages	Lightweight package, simple service, strong hole‑shot and mid‑range torque for small boats.
Notes	Cooling and gearcase parts may differ by serial range and shaft length. Match water pump kits, anodes, and seals to your exact model.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow the procedures and schedules in your official service manual.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water/metal. Replace drain/fill gaskets; reseal if contamination is found.	Mercury Lower Unit Seal Kits
Spark plugs	100 hours or annually	Check gap and color; replace fouled or worn plugs to restore idle and acceleration.	Spark Plugs
Fuel filter / inline filter	50–100 hours or each season	Replace to prevent lean running and hard starts; verify primer bulb and lines.	Fuel Filters
Water pump impeller / kit	Inspect annually; replace every 2–3 years (sooner in sand/silt)	Key to cooling system health; check wear plate, cup, and gaskets.	Mercury Water Pump Repair Kits
Anodes (sacrificial)	Inspect often; replace when ~50% depleted	Match material (aluminum/zinc) to your waters; keep mounting surfaces clean.	Anodes
2‑Stroke oil system (premix or injection)	Each season; check frequently	Premix models often use 50:1 TC‑W3; injection models: inspect oil lines, bleed pump, verify alarms.	Hoses (oil/fuel lines)
Carburetor service	As needed	Clean jets/float bowl; synchronize link & sync to improve idle and throttle response.	Carburetor Components

Frequently Used Parts Categories

Routine Service — Service & Maintenance Kits
Cooling System — Water Pump Repair Kits
Fuel System — Fuel Filters and Fuel Pumps
Ignition / Electrical — Electrical Items
Corrosion Protection — Anodes
Lower Unit / Seals — Mercury Lower Unit Seal Kits
Propellers — Propellers

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream / overheat alarm	Inspect intake screens for blockage; verify impeller condition; check thermostat operation.	Water pump repair kit, impeller, thermostat, intake screen grommets
Poor acceleration / power loss	Check prop for damage/cavitation; replace clogged fuel filter; inspect spark plugs and carb settings.	Propeller, fuel filter, spark plugs, carburetor kit
Hard starting / rough idle	Verify fresh fuel; check primer bulb and fuel lines; confirm choke/enrichment and idle mixture.	Spark plugs, fuel lines/primer bulb, carburetor components
Excessive smoke (2‑stroke)	Confirm mix ratio (premix) or oil‑injection calibration; ensure correct TC‑W3 oil; inspect reeds for pooling.	Oil lines/hoses, reeds, spark plugs
Gearcase noise / metal in gear oil	Drain and inspect oil; check prop hub and seal surfaces; pressure/vacuum test gearcase if needed.	Lower unit seal kit, bearings, prop hub components

FAQs

Are parts interchangeable between different years or platforms?

Many service items fit a broad serial range, but cooling, ignition, and gearcase parts often change with year, shaft length, and serial breaks. Always verify by serial/model before ordering.

When should the impeller be replaced?

Inspect annually and replace every 2–3 seasons, or sooner if you run in sandy/silty shallows or notice a weak tell‑tale stream or high temperatures.

How often should gear oil be changed?

For typical use, replace lower unit gear oil every 100 hours or once per season and after any suspected impact. Milky oil indicates water intrusion and the need for resealing.

What information do you need to confirm part compatibility?

Provide the engine serial number, shaft length, control type (tiller/remote), starting method (pull/electric), and any known year range. Photos of the nameplate and the part needing replacement help ensure a precise match.

Ready to find parts by horsepower, year, and model? Browse the main Mercury collection to locate components that match your 35 HP 2‑stroke setup.

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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.