Quicksilver 35 HP Marine Engine Components

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This page supports Quicksilver 2‑Stroke 35 HP outboard engines and helps you find compatible parts and service information. Inside you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection for broader coverage. 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 results by horsepower, year range, and part category.

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How to Identify Your 35 HP Model

Find the serial/ID plate on the transom bracket or swivel bracket. The serial number is the most reliable way to confirm exact parts fitment.
Read the model suffix letters (e.g., E = electric start, M = manual; S/L = short/long shaft; R = remote, T = tiller). These features affect ignition, control, and rigging components.
Platform cues: Most 35 HP units in this class are 2‑stroke inline twin‑cylinder designs with carburetion. Note whether your engine is premix or has oil injection.
Shaft length check: Measure from the mounting surface to the cavitation plate (about 15" short, 20" long). Propeller and gearcase parts may vary by shaft and gear ratio.

Platform Overview

35 HP Inline‑2 Two‑Stroke

Feature	Description
Configuration	Inline 2‑cylinder, carbureted 2‑stroke with CDI ignition on many variants.
Common Models	Mercury/Mariner 35 HP 2‑cyl models in short and long shaft, tiller or remote, manual or electric start.
Advantages	Light weight, simple layout, strong low‑end torque, straightforward service with widely available Quicksilver and aftermarket parts.
Notes	Parts often vary by serial number due to carburetor and ignition updates. Verify serial and features (premix vs. oil injection, shaft length) before ordering.

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
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water intrusion or metal; replace seals if oil is milky.	Mercury Lower Unit Seal Kits
Spark plugs	Inspect each 50 hours; replace 100 hours/annual	Use correct heat range and gap; misfire or hard starting often improves with fresh plugs.	Spark plug
Fuel filter / inline filter	Every 100 hours or sooner with contaminated fuel	Replace if restricted or water‑logged; check primer bulb and hoses for cracks.	Fuel Filters
Water pump impeller / kit	Every 100 hours or annually	Replace sooner after overheat or sandy/silty operation to protect the powerhead.	Mercury Water Pump Repair Kits
Anodes (zincs)	Inspect 50 hours; replace when 50% consumed	Choose alloy for your water (aluminum, magnesium, or zinc) to prevent corrosion.	Anodes
Premix or oil‑injection service (2‑stroke)	Pre‑trip check; inspect system annually	Verify 50:1 premix on non‑injected models. On injected units, inspect tank, lines, screens, and pump operation.	Mercury Outboard Parts
Propeller & hardware	Inspect each trip	Remove fishing line, check for dings, and verify nut/cotter pin security.	Propellers

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream or overheat alarm	Clear tell‑tale, inspect intake screens, verify impeller condition, and thermostat operation.	Water pump kit, intake screen, thermostat, housing gasket
Poor acceleration or power loss	Check propeller for damage or wrong pitch, replace fuel filter, verify primer bulb, inspect plugs.	Propeller, spark plugs, fuel filter, fuel pump diaphragm
Hard starting or rough idle	Confirm choke/enrichment, clean carburetor, check for air leaks and stale fuel.	Spark plugs, carburetor kit, fuel lines, inline filter
Excessive smoke (2‑stroke)	Verify premix ratio, inspect oil injection settings and lines, ensure correct plugs.	Spark plugs, oil injection components, fuel filter
Gearcase noise or metal in gear oil	Check oil level and water ingress; inspect prop shaft seals and bearings.	Seal kit, bearings, gear oil

FAQs

Are parts interchangeable between different years or platforms?

Some fasteners and service items interchange, but many ignition, carburetor, and gearcase parts vary by serial number and configuration (tiller vs. remote, shaft length, premix vs. oil injection). Always confirm with your serial/ID plate.

When should the impeller be replaced?

As a rule of thumb, replace the impeller every 100 hours or annually, and immediately after an overheat event or use in sandy/silty water. Regular service protects the powerhead from overheating.

How often should gear oil be changed?

Change lower unit gear oil at least annually or every 100 hours. If you see milky oil or water contamination, service seals and refill before further operation.

What information do I need to confirm part compatibility?

Provide the serial number or complete model code, shaft length (short/long), control type (tiller/remote), and starting method (manual/electric). Photos of the nameplate and the part needing replacement are also helpful.

Ready to find parts by horsepower, year, and model? Browse the main Mercury collection for Quicksilver‑compatible components across popular 35 HP variants.

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If you’re unsure about your model, send us a clear photo of the nameplate and the part you need and we’ll help verify compatibility.