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Intek™ Series (Single Cylinder)

10.50-18.50 Gross Horsepower

Discover a new standard in reliability. The powerful Intek™ Series riding mower engines deliver superior performance and durability. The XRD incorporates dozens of endurance-driving improvements, joined by the comfort of an Anti-Vibration System and the convenience of a Tool-less Air Cleaner Cover. It's riding mower engine you can rely on.

  • More durable. More efficient. More powerful. Mows the lawn and lasts long.

  • Lawn Mower Engine Torque

    Cubic centimeters (cc) only measure the size of the engine on your lawn mower or outdoor power equipment. Torque measures the power that rotates the blade. Maximize your mowing power.

  • Tool-less Air Cleaner Cover

    Easy access for filter changes

  • Briggs & Stratton OHV Engine Design
    Overhead Valve (OHV) Engine Design

    OHV engines run cooler and cleaner for better fuel economy and longer engine life.

  • Safeguards engines against ethanol damage and maintains fuel stability for up to 3 years.

  • Avoid Lawn Mower Engine Damage

    Look Before you pump fuel into your lawn mower and help avoid engine damage. Do not use any fuel containing greater than 10 percent ethanol (E10) in the engine on your outdoor power equipment.

  • Full Pressure Lube System

    Cooler operation and longer life.

  • Dura-Bore™ Cast Iron Sleeve

    Withstands wear and abuse.

  • Advanced Debris Lawn Mower Filter
    Advanced Debris Management System

    Keeps your engine clean by deflecting most debris like micro grass clippings & lawn debris and filtering the rest.

HP** (gross) 10.50
Engine Displacement (cc) 344
Number of Cylinders Single
Engine Configuration Vertical Shaft
Engine Technology OHV
Length (in) 17.8
Width (in) 15.5
Height (in) 12.9
Weight (lbs) 59.0
Bore (in) 3.44
Stroke (in) 2.26
Engine Fuel Gasoline
Fuel Tank Capacity (gallons) 0.68
Lubrication System Pressure Lubrication
Oil Capacity (oz) 48
Oil Filter Standard
Starter Electric Start, Recoil Optional
Air Filter Cartridge Air Cleaner with Advanced Debris Management
Muffler Lo-Tone or Super Lo-Tone
Fuel Shutoff Valve Optional

*All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.

*All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.

Intek™ Series (Single Cylinder) is rated 2.3793 out of 5 by 29.
Rated 5 out of 5 by from great engine I'm on my seventh season with this engine. I use it year around, mowing and plowing snow with my John Deere tractor. I've never had a bit of trouble with this engine. It starts right up in the coldest weather as well as the hottest weather. Currently I have over 300 trouble free hours.
Date published: 2012-06-03
Rated 2 out of 5 by from Earlier model has head gasket problem I hope that the improvements in the "XRD" system include a redesigned head gasket system. My 6 year old engine (31P777 series) has required a new head gasket twice so far. The gasket fails in the area between the cylinder wall and the oil galley, allowing exhaust to contaminate the oil and oil vapor to be drawn into the cylinder. The original gasket managed to hold up long enough to be out of the two year warranty. I noticed that the latest gasket has a new part number; hopefully it has been redesigned.I have found that older B&S engines seem to run forever with no repairs; my oldest (23 years) is in a push mower.
Date published: 2011-11-02
Rated 1 out of 5 by from Disposable Engine I've been repairing engines since 1972, and this is one of the absolute worst designs I've seen/worked on. While B&S are dead-on with sooo many great engines, they dropped the ball BADLY with this one.The head gasket configuration is SO inadiquite, that a first year engineering student would know it was/is doomed to repeated failure. After 40 years of repairing engines in automative, power equipment and marine applications (all of them#, I think I've earned the right to vent on this engine's shortcoming#s), and there are several.The latest adventure was when a customer called in the spring with a "won't start" call. Back at the shop we discovered a mouse nest the size of a Buick under the cover (we do dozens of these every year). Other than that, the cooling fins were clear, so it should have been as easy as cleaning it, and replacing the coil that had its plug wire chewed in 2 by said mice.Installed the new coil and it wouldn't start. Threw a commpression tester on her and had 2 pounds. Bummer.Replaced head gasket only to discover valve guides and pushrods were worn beyond spec, so compression was still low. Even then, the starter was taxed badly to turn her over. I won't even TELL you how upset I was to discover the intake lobe of the cam was worn.A bad head gasket design leads to failure, which in turn sets in motion a series of failures cascading through the ENTIRE VALVE TRAIN.This is a disposable engine with a VERY short life span. SHAME ON YOU B&S.
Date published: 2012-05-25
Rated 1 out of 5 by from ROTTEN!! I have owned this for just over 2 years, and it is burning oil!! Just out of warranty, that figures. I contacted Briggs about warranty, no answer. I will never get another Briggs engine in any power equipment...unless I plan to sell it after one year!!
Date published: 2011-10-31
Rated 2 out of 5 by from failed head gasket the head gasket on my john deere la 125 failed after 26 months which put me 2 months past my warranty. now having read in your answer and questions that seem to be a regular problem with your product. i have ordered a new one from your online sight. i had always wanted a john deere with a briggs stratton motor and i was proud of this purchase it was a lot of money for me now i cant believe a company woud sale a product that is faulty. you can look at the gasket and see the weak spot where it failed the gap is to far apart of the bolt holes thanx for letting me vent
Date published: 2012-05-07
Rated 2 out of 5 by from This product is not reliable I have the 21hp engine and it began to burn oil and blow blue smoke. The engine has only 3 seasons of just cutting grass. I was concerned that the rings were bad but afer reading the reviews I find that it's the head gasket. I would hope that the BnS engineers would come up with a better service part to fix the bad design but I doubt it since it lasted through the warranty period. I would not recommend this engine until they fix the flaw.It would also be good PR to publish a response to this issue on their web site.
Date published: 2012-05-17
Rated 1 out of 5 by from leaked and burned oil I purchased a Craftsman lawn tractor in 2008 with this engine. Within the first 3 months it started leaking oil. I thought it was just the quick release oil drain, so I replaced it with pipe. Still leaked and got worse with time. I turn it in for warranty repair end of the 2 year mark. They had to replace the lower seal. No more oil on the floor, but I still needed to add oil after every mowing - not sure when it started burning the oil. But was not able to take it back for warranty due to over the 2 year mark. I kept adding oil for each mower and the use continuously got worse and started fouling the plug in the 3rd season. This is the forth season but because of the drought we haven't needed to mow, until last night. Now it's blow so much blue smoke that it's hard to mow at times. I thought I maintained my equipment well, but this engine didn't hold up. The mower is still good but the engine is shot. Not sure if I'll replace the engine as I don't was another experience like this one. I wish I knew of another brand that would fit the mower. I wonder if Briggs would provide a replacement or at least let me purchase another engine at cost.
Date published: 2012-08-29
Rated 4 out of 5 by from Numerous design flaws As a power mechanic I've had the opportunity to repair / rebuild many of these particular model engines. The issues I've seen in this particular engine are, Poor head gasket design. Found many engines blow the head gasket into the valve push rod area over pressurizing the crankcase and causing engine to smoke excessively. Leaky Carbs. Can't count how many times I needed to install new float needle valves also install manual shut-off vales for good measure. Poor cam shaft. Found a few engines that worn the exhaust lobe of the cam shaft in turn not allowing the exhaust valve to open fully. Leaky valve cover gaskets. Valve covers leak, in turn dripping oil onto the muffler and causing engine to smoke.
Date published: 2011-11-01

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