Indmar 4-Stroke 335HP Marine Engine Parts

(4 products)

This page focuses on Indmar 4‑Stroke 335HP outboard engines and helps you quickly find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Indmar collection for a wider parts selection. Scroll to the bottom of this page to start browsing parts for this engine, and remember you can use the “Filter & Sort” controls on the collection page to narrow results by horsepower, year range, and part category.

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How to Identify Your 335HP Model

Locate the engine nameplate/serial plate on the clamp bracket or near the powerhead. Record the complete model code and serial number.
Decode the model suffix for shaft length (S/L/XL), control type (tiller/remote), and year code. This helps ensure parts compatibility.
Confirm it’s a 4‑stroke platform by looking for the engine oil fill and filter, ECM label, and emissions tag.
If multiple platforms exist in your range (V6 vs. V8), verify displacement and ignition/fuel system type before ordering.

Platform Overview

V8 EFI 4‑Stroke Platform

Feature	Description
Configuration	V8, EFI 4‑stroke with electronic ignition and high‑output charging.
Common Models	335HP 4‑stroke V8 variants (confirm exact model code and serial for parts).
Advantages	Strong low‑to‑midrange torque, smooth idle, and dependable fuel economy for a high‑horsepower class.
Notes	Always match service parts to model/serial. Cooling and fuel components may differ by year and control package.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 4‑stroke outboards; always follow the official service manual for your exact model and usage conditions.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	100 hours or annually	Use FC‑W compliant marine 4‑stroke oil; check level often during break‑in.	Oil Filters
Gear oil (lower unit)	100 hours or annually	Inspect drain plug magnet; if water or metal is present, service seals/bearings.	Lower Unit Seal Kits
Spark plugs	100 hours or 1–3 seasons	Replace sooner if misfire, hard start, or excessive fouling occurs.	Spark plug
Fuel filter / water separator	100 hours or annually	Drain/replace more often in high humidity or ethanol‑fuel environments.	Fuel Filters
Water pump impeller / kit	2 seasons or 200 hours (severe use: annually)	Replace sooner if weak tell‑tale stream or overheat alarm occurs.	Water Pump Impeller Rebuild Kits
Anodes (sacrificial)	Inspect every 50 hours; replace at >50% loss	Choose zinc (salt), aluminum (brackish), or magnesium (fresh) per water type.	Anodes

Frequently Used Parts Categories

Routine Service: Oil Filters
Cooling System: Water pumps and Impellers
Fuel System: Fuel Filters and Fuel Pumps
Ignition / Electrical: Electrical Items, Starters, Alternators
Propulsion & Hardware: Propellers
Sealing & Gaskets: Gaskets and Oil Seals
Corrosion Protection: Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream / overheat alarm	Inspect intake screens for blockage; confirm impeller condition; verify thermostat operation.	Water pump kit, impeller, thermostat, intake screen
Poor acceleration / power loss	Check prop condition and pitch; replace fuel/water‑separating filter; inspect plugs.	Propeller, fuel filter, spark plugs
Hard starting / rough idle	Confirm battery voltage and connections; check spark plugs; inspect for stale fuel.	Spark plugs, battery cables, fuel filter, injectors
Gearcase noise / metal in gear oil	Drain and inspect gear oil for water/metal; pressure test lower unit for seal leaks.	Lower unit seal kit, bearings, shims

FAQs

Are parts interchangeable between different years or platforms?

Some service items interchange, but critical components (cooling, fuel, ignition, sensors) can vary by model year, displacement, and control package. Always verify using the full model and serial number.

When should the water pump impeller be replaced?

As a rule of thumb, replace the impeller every two seasons or 200 hours—annually for heavy use, sandy/silty water, or if you notice a weak tell‑tale stream or overheat warnings.

How often should gear oil be changed?

Change the lower unit gear oil every 100 hours or annually. Inspect for water contamination or metal on the drain plug magnet; address seal or bearing issues immediately if found.

What information helps confirm part compatibility?

Provide the complete model code, serial number, shaft length, control type, and any known year range. Photos of the nameplate and the existing part help eliminate guesswork.

Ready to find parts by horsepower, year, and model? Start with our core engine service categories and refine as needed.

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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.