Briggs & Stratton 33S877-0019-G1 Vertical Engine with Electric Start, Replaces 33R877-0003-G1

The absolute best way to determine the correct replacement engine for your equipment is to locate the model number and type/spec/serial code on the current engine that you’re replacing or repairing.

The location of the engine identification information varies depending on the manufacturer. We have a great guide on finding your engine model information here.

Once you have this information, send us an email, chat with us online or give us a call and we can find the correct replacement engine or part for you and verify that it’s available.

We do not recommend purchasing any replacement parts or engines based on an image alone. We have hundreds of engines on our website and many of them are variations of the same model, sometimes with only slight differences that may not be easy to see in a photo. But small differences in specs, such as the crankshaft length or the height of an air cleaner, can make them incompatible with your equipment.

The only way we can guarantee an engine or part will work for your application is by using your original engine or equipment model information to find a direct replacement.

First, we recommend verifying that the model and spec numbers on the engine you received match the information in your order confirmation. Rarely do we pick and ship the wrong engine, but it doesn't hurt to check.

Look the engine over to ensure there is no visible damage.

We advise customers to dry mount the engine to the equipment to make sure everything looks good. Lastly, add oil and gas before powering up.

Engine manufacturers are continuously replacing older engine models with new and improved versions that will work in their place - that's why engine model information is always changing. Unfortunately, some specs don't get replaced with a new model and eventually our stock runs dry.

Luckily, there is still some hope if the engine you need has been discontinued and is unavailable. After you provide us with your current engine and equipment information, our technician will do some research to see if there is an alternative engine that will work. While we can't always find another option for you, it's worth a shot!

We accept all major credit cards including Visa, Mastercard, American Express and Discovery. We also accept Shop Pay, PayPal and Google Pay as express checkout options. When selecting express checkout options, you'll be asked to sign into the corresponding account and then you will be redirected back to our site to complete your order. We also accept checks if that is necessary - give us a call and we'll help get your order placed and provide additional information.

No. Our customers' privacy and security is important to us. We do not store your debit or credit card info. This data is encrypted to protect your information.

For that reason, the collection of payment details must be repeated when extra charges need to be applied to your order, such as extra shipping fees to Alaska, Hawaii, or difficult-to-access addresses.

Because we don't store your financial information, we also cannot offer automated repeat purchases. We do offer accelerated payment options like PayPal and Shop Pay at checkout. If you utilize either of these services, it can make checkout much speedier.

We aim to process refunds within three days of an item being returned to us. Returned items must be inspected to ensure they are not used or damaged. Please note that your bank may take several days to process the payment back into your account after we process the refund on our end. We’ll contact you by email to let you know when your refund has been processed.

If the replacement part or engine you need is out of stock, we recommend reaching out to check on its availability. Some items are restocked quickly, but others may be on extended backorder. You can still place an order for an item that is out of stock, but we can't guarantee a firm shipping date. There is a chance that we may be able to find an alternative replacement part or engine if the one you need is not available - reach out with the part number you're looking at along with your equipment or engine information and we'll look into it for you!

An order confirmation is automatically sent to the email address used when placing an order. If you haven’t received your order confirmation within 24 hours, please get in touch at info@equipatron.com just in case there’s a problem with your order. Please check your mailbox’s spam or junk folder before reaching out in case the order confirmation has been diverted there.

Our goal is to get orders out the door as quickly as possible - that means there is only a short amount of time between when you place your order and when we start processing it. If you contact us right away after ordering, either by phone or at orders@equipatron.com, we may be able to cancel your order before it’s processed. If your order has already processed or shipped, it cannot be canceled.

Some shipping carriers allow you to update the delivery instructions for a tracking number on their website, and returning the package to the sender is sometimes an option. Otherwise, you can attempt to refuse the package if you are present at the time of delivery or contact us to return your order once you receive it. Please keep in mind that a shipping fee may be deducted from your refund if a package is refused for reasons other than damage.

The shipping carrier we utilize for your order is determined by the total weight of the package. Our lighter items will usually ship out via USPS First Class or Priority. Our heavier parts and most engines typically ship out UPS Ground. We also utilize FedEx for select items as well. Our heaviest engines will ship via freight, which may require an additional shipping charge. If your engine is shipping freight, we’ll reach out to you to coordinate delivery.

Our goal is to get orders out the door as quickly as possible. Our cut-off time for guaranteed same day shipping for in-stock orders is 11am CST. In-stock orders placed between 11am and 2pm CST are likely to ship the same day, but are not guaranteed to do so. As a general rule, our maximum handling time for in-stock orders placed after 11am CST is 1 day, meaning they will ship the following business day. Business days do not include weekends and Postal Service holidays.

Most orders being sent within the contiguous United States will be delivered in 3-5 business days after being shipped. That being said, we've seen longer transit times for orders going to more remote locations and quicker delivery for those closer to the shipping warehouse. Please keep in mind, we cannot foresee shipping delays that the carrier might run into.

We can ship most items anywhere within the United States. We do ship to noncontiguous states and US territories like Alaska, Hawaii and Puerto Rico, but larger items, including all engines, will incur an additional shipping charge. Give us a call or send us a message for a quote. We do not ship globally via our website, but we do have an eBay store that utilizes eBay's global shipping program on many of our products.

It's also worth noting that we can no longer ship the majority of the engines on our site to California. Starting in 2024, the state of California banned the sale of all small off-road engines (SOREs) manufactured in 2024 or later. It varies by engine manufacturer and model whether we can verify the date of manufacture, so it’s best to give us a call to determine the shipping availability to your location.

Orders under $100 will have a flat rate fee of $8.99 applied at checkout to cover shipping and handling. The majority of orders over $100 will ship free of charge. There are exceptions to our free shipping policy: our heaviest engines that a require a freight carrier will require an additional shipping charge. Similarly, engines and heavier parts shipping to a destination outside the contiguous United States, including Alaska and Hawaii, will incur an additional shipping charge as well. If your order falls under the aforementioned exceptions, we'll reach out to collect that additional shipping charge before completing your order.

Yes. Tracking information will automatically be sent to the email provided on your order once it has shipped. If you placed an order for in-stock items and still haven't received tracking information within 2 business days, first check your spam/junk folder in case our email was diverted there. If it's still not found, send us a message or give us a call and we'll figure out what's going on!

Usually, that's a no. We are able to offer thousands of replacement parts and engines on our website because they are stocked at numerous warehouses across the midwest; only a fraction of orders placed online are in stock at our headquarters in Grafton, WI. With that being said, we do stock some of our most popular engines here, including most Hondas. If you live in the Milwaukee area and would prefer to pick up an order in person, it might be worth contacting us to see if that's an option.

Unfortunately, damage during transit is always a potential risk, especially when shipping large, heavy items. While we foam-pack our engines to prevent as much damage as possible, it does still happen from time to time. If you are present when the package is being delivered and there is visible damage to the box, you can inform the delivery driver that you want to refuse the package and return it to the sender. If you notice damage after delivery has been made, give us a call. Don’t attempt to mount and run the engine until you’ve spoken with a representative. Do take photos of the damage to your engine and email them to info@equipatron.com.

When damage is minor and/or merely cosmetic, we will ship out the necessary replacement parts free of charge.

If the damage is more substantial, we can begin the replacement process. Give us a call and we’ll work with you to resolve the situation.

While factory defects are not very common, they do happen! Unfortunately, an engine or part is usually found to be defective only after it's been used, and we cannot accept returns on used items. Luckily, all of the engines on our website are covered by the manufacturer's warranty. If you believe that the replacement part or engine you ordered from us may be defective, contact us. It's helpful to have your equipment model and/or your original engine information available - that way can verify that the correct replacement engine or part was ordered/used.  If all signs point to a factory defect, we'll provide you with the nearest authorized servicing dealer where they can perform warranty service.

There are various reasons why an engine might not work as expected:

• The engine is incompatible. If you did not contact our customer support (or another trusted source) to cross your current engine to the correct replacement, there's a chance you might have ordered the wrong engine. Contact us with your order number and your old engine's model information so we can determine whether or not your new engine will work.
• The original engine was modified for a specific application. This isn't a very common problem we run into, but we cannot guarantee that a direct replacement will work on an engine that has been altered. If you are aware of what exactly was changed on your original engine, give us a call and we might be able to help troubleshoot. Otherwise, it is best to take it to your local small engine servicing shop.
• The engine is defective. All our engines are covered by the manufacturer's warranty in the event that a factory defect is causing issues. If you've got the right replacement engine, you've properly oiled and gassed your engine and there's no mechanical issues with the equipment it's powering, your local authorized servicing dealer will be able to help you out.
• The engine was run without oil. While an engine can start without oil, it won't run for long. The damage done while operating an engine without oil will cause