1. Home
    2. Engines
    3. Big Block V-Twin Horizontal Shaft

    40.0 Gross HP* EFI - Marine

    40.0 Gross HP* EFI Marine
    40.0 Gross HP* EFI Marine

    40.0 Gross HP* EFI - Marine

    993cc

    This Vanguard BIG BLOCK™ V-Twin EFI engine delivers optimized performance for marine applications and keeps you out on the water longer.

    • Designed with debris- and air- management features that enhance durability and performance, plus an oil system that improves lubrication, maximizes engine life and extends oil change intervals.
    • Backed by Vanguard’s 3-Year Commercial Warranty.

    40

    Horsepower (HP)

    993

    Displacement (cc)

    2

    No. of Cylinders

    Gas

    Fuel Type
    Feature

    Features

    Performance Muffler

    Designed for increased air flow

    Vanguard EFI

    Optimizes fuel injection and spark timing so the EFI engine delivers significant fuel savings, greater efficiency, easier starting and higher productivity.

    V-Twin OHV Technology

    Superior balance, low vibration, lower emissions, improved valve life, better fuel economy and higher HP/Weight.

    Heavy-Duty Cylinder and Sump

    Engine block designed to provide superior durability

    Industrial Grade Solenoid Shift Starter

    Quick reliable starts

    Engine Warranty

    Three year commercial engine warranty** for all applications

    Dura-Bore® Cast Iron Sleeve

    Withstands wear and abuse.

    Light Weight Piston & Ring Package

    Lowers noise, vibration, oil consumption, emissions and wear

    High Pressure Fuel Pump Module

    Alcohol & Stale Fuel Resistance

    Service Solution

    Suite of support and diagnostic tools allows for minimizing potential downtime

    Dynamically Balanced Crankshaft

    Minimizes engine noise and vibration

    Electronic Ignition

    Quick, dependable, starts with no maintenance required

    Electric Control Module (ECU)

    Allows for altitude compensation and optimized starting

    Specifications

    At least one product must be displayed. Please select another option to remove this product

    Model
    61G3, 61G4
    HP (gross) *
    40
    Engine Displacement (cc)
    993
    Engine Configuration
    Horizontal
    Bore (in)
    3.37
    Stroke (in)
    3.41
    Weight (lbs)
    125
    Oil Capacity (oz)
    78
    Compression Ratio
    8.5:1
    Air Cleaner
    Low Profile Air Cleaner
    Ignition System
    Computer Controlled Battery Ignition
    Lubrication System
    Full Pressure Lubrication with Oil Filter
    Length (in)
    14.92
    Width (in)
    19.53
    Height (in)
    28.54
    Commercial Engine Warranty **
    3 Year Commercial Limited
    Manuals
    DownloadRepair Manual - German
    DownloadRepair Manual - German
    DownloadRepair Manual - English
    DownloadRepair Manual - German
    DownloadRepair Manual - French
    DownloadRepair Manual - French
    DownloadRepair Manual - French
    DownloadRepair Manual - German
    DownloadRepair Manual - English
    DownloadRepair Manual - German
    DownloadRepair Manual - Italian
    DownloadRepair Manual - English
    DownloadRepair Manual - French
    DownloadRepair Manual - Italian
    DownloadRepair Manual - English
    DownloadRepair Manual - French
    DownloadRepair Manual - German
    DownloadRepair Manual - German
    DownloadRepair Manual - Italian
    DownloadRepair Manual - English
    DownloadRepair Manual - Italian
    DownloadRepair Manual - German
    DownloadRepair Manual - French
    DownloadRepair Manual - French
    DownloadRepair Manual - English
    DownloadRepair Manual - German
    DownloadRepair Manual - Italian
    DownloadRepair Manual - French
    DownloadRepair Manual - Italian
    DownloadRepair Manual - French
    DownloadRepair Manual - English
    DownloadRepair Manual - Italian
    DownloadRepair Manual - Italian
    DownloadRepair Manual - French
    DownloadRepair Manual - Italian
    DownloadRepair Manual - English
    DownloadRepair Manual - English
    DownloadRepair Manual - Italian
    DownloadRepair Manual - English
    DownloadRepair Manual - German
    DownloadOperator's Manual - English, Spanish-Colombian, French-Canadian
    DownloadOperator's Manual - English, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    DownloadOperator's Manual - English, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    DownloadOperator's Manual - English, Spanish-Colombian, French-Canadian
    DownloadOperator's Manual - English, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    DownloadOperator's Manual - English, Spanish-Colombian, French-Canadian
    DownloadOperator's Manual - English, Chinese-Simplified, Vietnamese, Indonesian, Thai, Khmer, Korean, Malay, Japanese
    DownloadOperator's Manual - English, Chinese-Simplified, Vietnamese, Indonesian, Thai, Khmer, Korean, Malay, Japanese
    DownloadOperator's Manual - English, Spanish-Colombian, French-Canadian
    DownloadOperator's Manual - English, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish

    Support

    Manuals

    Download the operator's manual or illustrated parts list for your Vanguard™ engine by searching your engine model number.

    Find Manuals >

    Tips & Troubleshooting

    Have a question? Search our Frequently Asked Questions to find answers related to model specifications, routine maintenance, repair or troubleshooting. 

    Search FAQs >

    Dealer Locator

    World class parts delivery, industry-leading global warranties and unparalleled service & training keeps your equipment out of the shop and on the jobsite. 

    Find a Dealer >

    Commercial Limited Warranty

    Three-year commercial engine warranty for all applications. See operator's manual or dealer for complete warranty details. 

    Learn More >

    Options

    Key Switch
    Alternators 20 20-50amp
    Oil Pressure Switch
    Straight Keyed Cranks (1-1/8" & 1-7/16" Diameters)
    Flywheel Stub Shaft
    Stainless Steel Performance Muffler
    High Speed 4750rpm Package (Marine & Utility Vehicles Only)
    Direct Throttle Control
    Tach Hour Meter with Check Engine Light
    Low Idle Speed Control
    Spline Crankshaft

    Product Literature

    Get more detailed information on what you can expect from Vanguard® and our BIG BLOCK™ V-Twin engines by downloading our literature here.

    Vanguard Facebook Vanguard Instagram Vanguard YouTube Vanguard LinkedIn


    Copyright © 2025 Briggs & Stratton. All rights reserved.