M-series Discussion


Building off of the proven success of the Animal engine, the M-series is the first dedicated racing engine engineered to meet the needs of the Quarter Midget market.  Right out-of-the-box, the M-series is focused on the consistency, and simplicity that racers deserve.  Each engine is hand-built and tested in Milwaukee, Wisconsin with the craftsmanship and quality we stand behind

Splined Crankshaft
Factory Controlled Piston Pop-up
Custom Control Plate to better fit today's cars
Ground Cam w/ Custom Compression Release
PVL™ 6100 RPM Limited Digital Ignition
Studded Exhaust Port
Fuel Filter
Dual Ball-Bearing, RACING Reinforced Cylinder
Squeeze-Cast, T-7 Treated, Racing Rod
High-Silicon Valve Springs
Racing Only Intake Port
Walbro™ Round - Slide Carburetor
Dana™ Fire-Ring Head Gasket
Racing Crankshaft w/ Induction-Hardened Crankpin
Federal Mogul™ Cam Ground, Barrel-Faced Piston
Chrome-Faced, Racing Only Ring Package
Nitrited Dished Exhaust Valve
Automotive 3-Piece Valve Retainer System
Beefy Rocker Arm Stud Nuts

Model Number 124332 8203-01
Type 8203-01
Displacement 206
Bore 2.6875/2.6885
Stroke 2.2
Compression Ratio 8.5 to 1
Factory Timing 29 degrees BTDC
Description Wrench / socket size Torque
Air Guard 7mm 40-50 lb-in. (4.5-5.6 Nm)
Blower Housing 10mm & 3/8" 60-110 lb-in. (7-12.5 Nm)
Carburetor (to manifold) 10mm 80-110 lb-in. (9-12.4 Nm)
Connecting Rod T27 115-120lb-in. (13 Nm)
Cylinder Head Bolts 10mm 200-220 lb-in. (20-27 Nm)
Exhaust Brace Screws 10mm 95-125 lb-in. (11-14 Nm)
Exhaust Stud 10mm 95-125 lb-in. (11-14 Nm)
Flywheel Nut 15/16" 55-75 ft-lbs. (74.5-101 Nm)
Flywheel Fan 10mm 180-240 lb-in. (20-27 Nm)
Intake (to cylinder) 5mm Allen 70-90 lb-in. (8-10.2 Nm)
Oil Drain Plug 3/8" 100-125 lb-in. (11-14 Nm)
PVL Module 7mm 20-35 lb-in. (2.3-4 Nm)
Rocker Arm Stud 7/16" 90-120 lb-in. (10-14 Nm)
Rocker Arm Plate 10mm 70-90 lb-in. (7.9-10.1 Nm)
Rocker Arm Set Screw 1/8" Allen 50-70 lb-in. (5.6-7.9 Nm)
Spark Plug 5/8" Deep 95-145 lb-in. (11-16.4 Nm)
Side Cover 10mm 140-170 lb-in. (16-19 Nm)
Starter Gear #2 Phillips 35-53 lb-in. (4-6 Nm)
Top Control Plate 10mm 70-90 lb-in. (8-10 Nm)
Valve Cover 10mm Lower & 3/8" 30-60 lb-in. (3.5-7 Nm)

What does this engine have that is an advantage over the standard animal?

Asked by: Jason E
For further assistance, please submit your request here:
Answered by: Tracey_BriggsStratton
Date published: 2015-11-10

Yes I'm looking for a short block for the m-series. Do you sell one and how woe I go about ordering it. Thanks. 

Asked by: Strangerodz
For shortblock information, please see an authorized local dealer. You can locate your nearest here:
Answered by: Tracey_BriggsStratton
Date published: 2015-09-28

Ih ave about 900$ to spend on a racing engine what would be my best option and how much torque (hp) whould it have and how fast would it go? Thanks! -tucker

Asked by: true_2000
Please contact your local Briggs Racing Dealer for assistance in choosing the best engine for your needs. You can locate a racing dealer here:
Answered by: Kaylin_BriggsStratton
Date published: 2015-07-20

What is the difference between this engine and the racing animal engine?

Asked by: Packman23
The main difference is the HP rating. Please work with your local dealer to determine the best racing engine to fit your needs. You can find a racing dealer here:
Answered by: Nicole_BriggsStratton
Date published: 2015-03-04

What is the starting system for this engine? Recoil or electric?

Asked by: Branden
The starting system is a push start. Typically once the engine is installed on a cart, the cart is pushed to start.
Answered by: Nicole_BriggsStratton
Date published: 2015-02-09

How much does it cost?

Asked by: TYE4
We do not sell factory direct and will not have pricing. Please work with a local dealer to purchase:
Answered by: Nicole_BriggsStratton
Date published: 2014-10-27

How much does this engine weigh??

Asked by: Jackie28
It is about 35 pounds.
Answered by: Nicole_BriggsStratton
Date published: 2014-08-07

How much HP does this motor put our? 

Asked by: Jamesco96
In general, using an SAE J1940 type testing method, a standard WF exhaust with an RVL US spec silencer the engine will be approx.11.2 hp. Please be aware that this dyno method is typically not used in the field and many of our dealers report higher horsepower numbers due to their approach.
Answered by: Nicole_BriggsStratton
Date published: 2015-08-07
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