1. Home
    2. Products
    3. Engines
    4. BIG BLOCK™ V-Twin Horizontal Shaft

    37.0 Gross HP* EFI/ETC

    37.0 Gross HP* EFIETC
    37.0 Gross HP* EFIETC
    37.0 Gross HP* EFIETC
    37.0 Gross HP* EFIETC

    37.0 Gross HP* EFI/ETC

    993cc

    This Vanguard BIG BLOCK™ V-Twin EFI engine with ETC delivers more efficient fuel performance and longer oil change intervals so your operating costs are lower.

    • Features Electronic Throttle Control that maintains smooth, consistent power in any environment.
    • 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.

    37

    Horsepower (HP)

    993

    Displacement (cc)

    2

    No. of Cylinders

    Gas

    Fuel Type
    Feature

    Features

    Vanguard EFI/ETC

    Achieve consistent power, optimize fuel efficiency, and improve starting performance with electronic fuel injection (EFI). With electronic throttle control (ETC), the engine instantly adjusts power to match any load, ensuring peak performance at all times.
    Learn more >>>

    Advanced Debris Management

    Experience enhanced engine performance and durability, even in the toughest dusty and dirty conditions. The multi-stage air cleaner, chopper fan and clean out panels keeps the engine running smooth and cool, ensuring long-lasting reliability and peak performance.

    High Efficiency Head Design

    Stay productive even in the toughest conditions with new, improved cylinder heads designed to keep your engine cooler for longer. With a 30-degree temperature reduction†, our High-Efficiency Head Design enhances cooling performance, helping extend engine life and maintain peak productivity. Additional cooling features, including extra fins and increased aluminum, further boost durability and reliability when you need it most.

    Magnetron® Electronic Ignition

    Start your equipment quickly and reliably every time—no maintenance needed, so you can get to work without hassle.

    †Versus previous head design.

    Specifications

    Only 2 products can be compared at once. Please remove one of your selections to compare this product.

    Only 3 products can be compared at once. Please remove one of your selections to compare this product.

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

    Model
    61A2
    HP (gross) *
    37
    Engine Displacement (cc)
    993
    Engine Configuration
    Horizontal
    Bore (in)
    3.37
    Stroke (in)
    3.41
    Weight (lbs)
    125
    Oil Capacity (oz)
    78
    Compression Ratio
    8.2:1
    Air Cleaner
    Five-Inch Cyclonic Air Cleaner
    Ignition System
    Computer Controlled Battery Ignition
    Lubrication System
    Full Pressure Lubrication System with Oil Cleaner
    Length (in)
    14.92
    Width (in)
    19.53
    Height (in)
    28.54
    Commercial Engine Warranty**
    3-Year Limited
    Manuals
    DownloadRepair Manual - English
    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, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    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, 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, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    DownloadOperator's Manual - English, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    DownloadOperator's Manual - English, Chinese-Simplified, Vietnamese, Indonesian, Thai, Khmer, Korean, Malay, Japanese
    DownloadOperator's Manual - English, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    DownloadOperator's Manual - English, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    DownloadOperator's Manual - English, Chinese-Simplified, Vietnamese, Indonesian, Thai, Khmer, Korean, Malay, Japanese
    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, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    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, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    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, Danish, Dutch, Finnish, French-European, Greek, Italian, German, Norwegian, Portuguese-European, Spanish-European, Swedish
    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, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    DownloadOperator's Manual - English, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    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, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    DownloadOperator's Manual - English, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    DownloadOperator's Manual - English, Bulgarian, Czech, Estonian, Croatian, Hungarian, Lithuanian, Latvian, Polish, Romanian, Russian, Slovak, Slovenian, Turkish
    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, 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, 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, Chinese-Simplified, Vietnamese, Indonesian, Thai, Khmer, Korean, Malay, Japanese
    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, 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, 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

    *All power levels are stated horsepower per SAE J1940 as rated by Briggs & Stratton.
    **See operator's manual or dealer for complete warranty details.

    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 (H/S Only)
    Alternators (20 & 20-50 amp)
    Oil Pressure Switch
    Straight Keyed Cranks (1-1/8" & 1-7/16" Diameters)
    Flywheel Stub Shaft
    Low Profile Air Cleaner
    High & Mid Mounted Mufflers
    Tach/Hour Meter with Check Engine Light
    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.

    Learn more about Vanguard® EFI & ETC Technology and how it works by downloading our literature here.

    Email Newsletter Sign Up

    Vanguard Facebook Vanguard Instagram Vanguard YouTube Vanguard LinkedIn

    Copyright © 2025 Briggs & Stratton. All rights reserved.