23hp Engine 627cc Vanguard 1″ , Electric and Recoil Start, 20 amp Alternator – 386447-0438-G1


A 627cc Briggs and Stratton two-cylinder engine that fits our Large Mud Motor Kit with a 1″ engine PTO coupler shaft.
23HP Operator’s Manual
Ships Direct from the Manufacturer
3 Year Manufacturer’s Warranty


SKU: 386447-0438-G1 Categories: , Tags: , , , , , , ,

This 23hp engine has 627cc and is made by Vanguard, Briggs and Stratton Engines. Being a two-cylinder engine, you will get less vibration compared to a single-cylinder engine.

Engine Features

  • Horsepower = 23
  • Displacement = 627cc
  • Torque = 35 ft-lbs Gross Torque, 32 ft-lbs Net Torque
  • Weight = 77 lbs (without muffler)
  • Dimensions = 17.75" tall, 16" wide, 12.5" deep (without muffler and additions)
  • Recoil Starter AND Electric Start
  • 50-State CARB Compliant
  • Horizontal 1” Keyway Shaft that is 4” long
  • 3-year Manufacturer Limited Warranty (consumer)
  • 3-year Manufacturer Limited Warranty (commercial)
  • Assembled with a Fuel Pump but NO Fuel Tank
  • 20 Amp Charging System
  • Manual or Remote Choke Control
  • Dura-Bore Cast Iron Cylinder Sleeve
  • Does NOT come with mufflers unless you use the checkboxes

Additional Parts

The 23hp engine is the perfect size for our Large Swamp Runner Kit (with a 1" output shaft). Secondly, the muffler we recommend and offer to go on this motor is a High Mount, Center Outlet Muffler (part #808911) +$162.
As a result, with this muffler being the high mount option, it will stay out of the way of the Swamp Runner coupler housing for your mud motor kit.

The old engine number was 386447-3065-G1. The new engine number is 386447-0438-G1

23HP Operator's Manual

INVENTORY: Pending stock confirmation. Once inventory is secured, you will be charged. If this item is out of stock or has a waiting period, we will notify you before charging you.
: By freight to the continental United States only. This item does not ship to Alaska, Hawaii, Puerto Rico, or Canada.
Upon delivery immediately inspect items. If damaged, photograph the damage, refuse to accept the item from the carrier, and contact Swamp Runner immediately.
RETURN POLICY: This item ships directly from the manufacturer, and they DO NOT ACCEPT RETURNS (unless an item is damaged or an incorrect item is shipped)
WARRANTY: 3 Year Manufacturer’s Warranty
For warranty, repairs contact your nearest Authorized Briggs & Stratton Service Center

Model Series 3864
Displacement 627
Oil Capacity 48 oz (1.4 l)
Valve Configuration OHV
Flywheel Torque 125 lb/ft (169.5 Nm)
Governor Arm Torque 115 lb/in (13.0 Nm)
Carb Mount 65 lb/in (7.5 Nm)
Plug Gap 0.03 in (0.75 mm)
Intake Valve .004-.006 in (.10-.15 mm)
Exhaust Valve .004-.006 in (.10-.15 mm)
Idle Speed 1750
Air Gap .008-.012 in (.20-.30 mm)
Flywheel Puller Part 19203
Flywheel Holder Part 19433
Connecting Rod Torque 115 lb/in (13.0 Nm)
Sump Torque 150 lb/in (17.0 Nm)
Head Torque 165 lb/in (18.5 Nm)
Top No Load (rpms) 3600

Vanguard Commercial Series _ Consumer Use & Commercial Use 36 Month Warranty _ Please view the Operators Manual for more information.


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