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  • Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100

Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100

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Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100
Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100
Load image into Gallery viewer, Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100
Load image into Gallery viewer, Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100
$5,439
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61A2770100J1AD0001
Briggs & Stratton Engines Horizontal Shaft Engines//Parts

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. The engine is designed for the most demanding conditions when pure power is needed. Vanguards V-Twin technology features superior performance at greater fueler economy. Fitted with a dura-bore cast iron technology and a heavy-duty air filtration system, heavy-duty cylinder sump, and more. 

  • V-Twin OHV Technology – Provides superior balance, reduced vibration, and improved fuel efficiency.

  • Advanced Debris Management – Multi-stage air cleaner and fan system enhances durability in dusty conditions.

  • Vanguard EFI – Delivers consistent power and optimized fuel efficiency.

  • Dura-Bore Cast Iron Cylinder Sleeve – Increases wear resistance and improves oil control.

  • Three-Year Commercial Engine Warranty – Covers all applications.

  • High-Pressure Fuel Pump Module – Resistant to alcohol and stale fuel.

  • Electronic Control Module (ECU) – Enables altitude compensation and reliable starting.

  • Service Solution Suite – Diagnostic tools reduce downtime and support maintenance.

  • Full Pressure Lubrication with Spin-On Oil Filter – Ensures clean oil and long-lasting engine components.

  • Centrally Located Oil Pump and Pickup – Improves oil priming and allows higher angle operation.

  • Oil Cooler – Maintains optimal oil temperature for better performance and extended oil change intervals.

  • Heavy-Duty Cylinder and Sump – Provides superior engine block durability.

  • High-Efficiency Head Design – Reduces cylinder head temperature by up to 30°C for improved longevity.

  • Lightweight Piston & Ring Package – Lowers noise, vibration, emissions, and oil consumption.

  • Dynamically Balanced Crankshaft – Minimizes engine noise and vibration for quieter operation.

  • Five-Inch Centrifugal Multi-Stage Air Cleaner – Offers maximum engine protection in harsh environments.

  • Industrial Grade Solenoid Shift Starter – Delivers quick and reliable starts.

  • Magnetron® Electronic Ignition – Provides maintenance-free, dependable starting.

  • Engineered Resin Blower Housing, Flywheel Fan & Super Lo-Tone Muffler – Reduces noise and improves sound quality.

Please note: The 1-7/16" shaft engine has progressed to an ETC (Electronic Throttle Control) system. The new 61A series engines (35–37 HP EFI Vanguard) are replacing the previous 61E models. The key difference is that the 61E featured a mechanical governor, while the 61A is equipped with electronic throttle control. This upgrade reduces RPM drop under sudden load and eliminates the need for an oxygen sensor.

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Briggs & Stratton 37hp EFI/ETC Vanguard™ V-Twin Commercial Horizontal 1-7/16" Shaft Engine 61A277-0100
Description

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. The engine is designed for the most demanding conditions when pure power is needed. Vanguards V-Twin technology features superior performance at greater fueler economy. Fitted with a dura-bore cast iron technology and a heavy-duty air filtration system, heavy-duty cylinder sump, and more. 

  • V-Twin OHV Technology – Provides superior balance, reduced vibration, and improved fuel efficiency.

  • Advanced Debris Management – Multi-stage air cleaner and fan system enhances durability in dusty conditions.

  • Vanguard EFI – Delivers consistent power and optimized fuel efficiency.

  • Dura-Bore Cast Iron Cylinder Sleeve – Increases wear resistance and improves oil control.

  • Three-Year Commercial Engine Warranty – Covers all applications.

  • High-Pressure Fuel Pump Module – Resistant to alcohol and stale fuel.

  • Electronic Control Module (ECU) – Enables altitude compensation and reliable starting.

  • Service Solution Suite – Diagnostic tools reduce downtime and support maintenance.

  • Full Pressure Lubrication with Spin-On Oil Filter – Ensures clean oil and long-lasting engine components.

  • Centrally Located Oil Pump and Pickup – Improves oil priming and allows higher angle operation.

  • Oil Cooler – Maintains optimal oil temperature for better performance and extended oil change intervals.

  • Heavy-Duty Cylinder and Sump – Provides superior engine block durability.

  • High-Efficiency Head Design – Reduces cylinder head temperature by up to 30°C for improved longevity.

  • Lightweight Piston & Ring Package – Lowers noise, vibration, emissions, and oil consumption.

  • Dynamically Balanced Crankshaft – Minimizes engine noise and vibration for quieter operation.

  • Five-Inch Centrifugal Multi-Stage Air Cleaner – Offers maximum engine protection in harsh environments.

  • Industrial Grade Solenoid Shift Starter – Delivers quick and reliable starts.

  • Magnetron® Electronic Ignition – Provides maintenance-free, dependable starting.

  • Engineered Resin Blower Housing, Flywheel Fan & Super Lo-Tone Muffler – Reduces noise and improves sound quality.

Please note: The 1-7/16" shaft engine has progressed to an ETC (Electronic Throttle Control) system. The new 61A series engines (35–37 HP EFI Vanguard) are replacing the previous 61E models. The key difference is that the 61E featured a mechanical governor, while the 61A is equipped with electronic throttle control. This upgrade reduces RPM drop under sudden load and eliminates the need for an oxygen sensor.

Read More
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Model
61A
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
Air Cleaner
Five Inch Cyclonic 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
Certified Power Rating
Download Power Curve
Commercial Engine Warranty**
3 Year Limited

We reserve the right to change specifications, features and pricing without notice. Products may vary from images shown.* Power levels rated by engine manufacturer. See operator's manual or dealer for complete warranty details. Refer to engine operator's manual for engine warranty.

Shipping
PowerMowers Australia proudly offers a comprehensive range of whole good products and parts brand catalogs for your browsing and ordering convenience. While we strive to maintain a robust inventory, please note that not all parts listed may be readily available in our warehouse. Whilst we prioritise transparency, it's important to understand that there might be delays in fulfilling your order due to various reasons, such as sourcing products from relevant suppliers or overseas manufacturers. We aim to assure you that we'll keep you informed every step of the way.

If an item is not readily available or must be sourced externally, rest assured that attempt will be made to communicate promptly with you. We aim to provide accurate shipping times, and you'll be notified if your order is expected to take longer than 15 business days to reach you. Your satisfaction is paramount to us. If you have any concerns about item availability, shipping times, or any questions regarding your order, please don't hesitate to reach out to us before placing your order. Our team is here to assist you every step of the way.

Your delivery cost will vary depending on the size, weight and location of the products you choose to purchase as well as your delivery location of choice. Normally the larger the item, the more expensive delivery will be. Extremely large goods (ie. items requiring a two man lift) will also incur higher delivery rates.

As we use couriers to deliver all parcels, products cannot be delivered to an unattended address. The courier, in most cases will not require a signature from an occupant at the specified delivery address. If no one is available to collect the parcel, it may be re-directed to the nearest courier depot. You will then be responsible for collecting the parcel from that depot or paying an additional charge for re-delivery.

PowerMowers recommends all deliveries be shipped to a location that is attended during business hours, whether that is a home, work or other address, to minimise any re-delivery delays and/or fees.

You may incur additional delivery fees or freight charges within the checkout, (in excess of the fees and charges specified above) for:

- Large quantity or bulk orders

- Express or urgent deliveries

- Non-stock and/or bespoke items

- If an item is returned to the sender due to incorrect delivery address provided by the customer (case-by-case basis)

At checkout, you will be notified of shipping costs for your approval, these are calculated automatically by the site in accordance with our courier companies' freight charges via a courier aggregation application. Bulky items are those with either a high weight or large cubic volume. Products are allocated as bulky as determined by the shipping methods of our courier companies.

In the event that the calculated shipping cost is deemed inaccurate or unjust, we reserve the right to request a revised payment or to cancel the order at our discretion. 

Returns Policy

Ensuring your satisfaction is our primary goal and utmost priority. Upon receiving your delivery, please inspect it promptly. Notify us immediately if any issues arise. In the event of receiving a damaged item, it is crucial to inform us within 48 hours of receipt.

NOTE: A restocking fee of 5% may apply for refunded returns.

If you decide to return an item due to a change of mind, you have a 30-days for a refund, excluding postage and handling. Initial responsibility for shipping and handling costs on returns lie with the customer. PowerMowers will only reimburse standard postage costs (express return fees excluded) if the item is covered by warranty purposes or if the item is incorrectly supplied. For a refund to be processed, the returned products must be in their original, unused condition and packaging. Kits/sets must be returned with all components included. Before making any alterations, cuts, or final fitments, purchasers are responsible for ensuring the correctness of the purchased item.

When returning products, please include the Order/Invoice Number. Products returned without reference of sale cannot be processed. We retain the right to deny a refund for returned items that have been fitted or are not in their original condition, including packaging.

If you select the delivery option when you place an order, it may take between 2 - 5 business days (3 - 10 business days for regional areas) after dispatch for your order to be delivered to your nominated address. Courier deliveries are made during business hours, Monday to Friday only. The delivery of your order may be delayed if an incorrect or incomplete address is provided, personal or payment details require verification for fraud prevention purposes, a product is not stocked near to your nominated address or there are other factors outside of our control.

This estimated delivery date is provided to you as a guide only. Unfortunately, circumstances may change beyond PowerMowers' control which may lead to a delay in your order being delivered on time. PowerMowers will not accept liability for any delay in procuring the ordered goods that is beyond reasonable control (ie. unavailable stock).

We will do our best to ensure that you are notified whether a product is available in your selected store at the time you place an order. However, if for any reason your product is not available or your order exceeds the maximum allowable quantity, we will contact you using the details you entered when you placed the order and offer an alternative to you. If you select the delivery option when you place an order, and your order is larger than one product, we may withhold your products until we are able to dispatch all item together.

If a particular product is in high demand we may need to supply the product from outside of our standard delivery network. This can cause delays in dispatch if orders are directed to regional locations etc.

If your order is not received within an expected delivery period please contact our Customer Support Team. Begin an Inquiry Form submission, send us an email or give us a call (phone line response times may vary depending on time of day & season). We will generally respond to online order complication matters within 24 hours.

We are pleased to accommodate international orders. To ensure we meet your needs effectively, please follow below steps:

1 - Begin an Inquiry Form submission, send us an email or give us a call (phone line response times may vary depending on time of day & season.

2 - Be sure to have all required information including parts description, product model numbers and/or serial codes present to ensure streamlined support. You may send us photos you've taken to assist with this.

Clearly outline your nominated delivery address

3 - Let us know a name and contact details of which we may reach you on if we're sourcing parts and seeking product availability for you.

Our team of experts will get to work! We'll get back to you as soon as we can with a detailed delivery quotation, estimated delivery times and all applicable fees.

Please be aware that international shipping costs and delivery times can vary based on the destination, order size, and weight. We aim to provide the most efficient and cost-effective shipping solutions for our international customers.

Delivery is available to any valid address across Australia (where a product is ordered through https://powermowers.com.au/ and the nominated address is located in Australia). If you select the delivery option when you place an order, you will be charged a flat rate delivery fee. However, if the cost to deliver the product to you significantly exceeds the delivery fee (for instance because you are located in a remote area or have placed a special order for large or heavy products), we may contact you to discuss alternative arrangements. This may include cancelling or modifying your order.

We provide an efficient delivery service available at your discretion. Due to the continuous weight changes and dimensions of large machinery please call to obtain a quote prior to purchase. Bulky deliveries such as engines will be delivered by our transport partners to a safe and easy to access location at the your nominated delivery address. For health & safety reasons in the majority of cases this will exclude delivery of the item up flights of stairs. Please have adequate assistance available to you following receipt of your delivery.

Should we have any issues delivering a large product to your nominated address, we'll contact you to further organise shipping terms.

Please consult our warranty page for detailed warranty clauses. If you have further questions that remain unanswered, you may begin an Inquiry Form submission, send us an email or give us a call (phone line response times may vary depending on time of day & season).

You can place an order at any time on our website at https://powermowers.com.au/ by logging into your account, or by creating a guest account. Please refer to our Privacy Policy for information concerning how we collect and use your personal information.

You will be able to collect your order during trading hours from our store. Once your order has been processed, you will receive an email confirmation with a date we expect your order to be ready for collection. We will do our best to ensure your order is ready by this date, however we may experience unexpected delays from time to time. If this occurs, we will contact you using the contact details you provide to us. It is helpful to have your order confirmation email available. If this information is not available when you collect your order, you will need to provide photo identification or details about your order (including your name and the products) to our store staff and they will locate your order for you.

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