The Briggs and Stratton 289707 is a 465 cc (28.38 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton.
The B&S 289707 engine has an L-head (side valve) design and a vertical PTO shaft. This engine is equipped with float type carburetor and an electronic ignition system. The B&S 286707 engine used a paper air filter with a foam pre-cleaner.
The cylinder bore is 87.30 mm (3.44 in) and the piston stroke is 77.7 mm (3.06 in). This engine produced 12.6 PS (9.3 kW; 12.5 HP) at 3,600 rpm of horsepower.
The breakdown of the engine code is as follows:
- 28 – Displacement
- 9 – Basic design series
- 7 – Vertical PTO-shaft
- 0 – Plain bearing
- 7 – Electric starter
General information
| Engine Specifications | |
| Model | B&S 289707 |
| Type | 4-stroke, L-head, single-cylinder |
| Displacement | 465 cm 3 (28.38 cu-in) |
| Max. horsepower | 12.6 PS (9.3 kW; 12.5 HP) at 3,600 rpm |
| Max. torque | – |
| Fuel system | Carburetor |
| Cooling system | Forced-air |
| Ignition system | Electronic |
| Lubricating system | Full pressure |
| Starting system | Electric starter |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | – |
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | – | |
| Bore x Stroke | 87.3 mm X 77.7 mm (3.44 x 3.06 in) | |
| Sleeve internal diameter | 87.300-87.400 mm (3.437-3.4409 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Side clearance | Top | 0.05-0.12 mm (0.002-0.0047 in) |
| Second | 0.05-0.12 mm (0.002-0.0047 in) | |
| Oil | 0.05-0.12 mm (0.002-0.0047 in) | |
| Ring end gap | Top | 0.15-0.23 mm (0.0059-0.0091 in) |
| Second | 0.35-0.45 mm (0.0138-0.0177 in) | |
| Oil | 0.15-0.25 mm (0.0059-0.0098 in) | |
| Connecting rod small end ID | 20.330-20.370 mm (0.8004-0.802 in) | |
| Piston pin outer diameter | 20.290-20.310 mm (0.7988-0.7996 in) | |
| Cylinder Head | ||
| Valve Arrangement: | L-head (sidevalve) | |
| Valves: | 2 | |
| Valve steam diameter | INTAKE | 5.920-5.970 mm (0.233-0.235 in) |
| EXHAUST | 5.920-5.970 mm (0.233-0.235 in) | |
Tightening torque specs
| Tightening torque specs | |
| Air cleaner base | 6.0 Nm; 4.4 ft·lb |
| Alternator | 2.0 Nm; 1.5 ft·lb |
| Armature | 3.0 Nm; 2.2 ft·lb |
| Blower housings | 10.0 Nm; 7.4 ft·lb |
| Blower housing brackets | 10.0 Nm; 7.4 ft·lb |
| Breather | 3.0 Nm; 2.2 ft·lb |
| Carburetor to intake manifold | 8.0 Nm; 5.9 ft·lb |
| Carburetor solenoid | 5.0 Nm; 3.7 ft·lb |
| Connecting rod | 17.0 Nm; 12.6 ft·lb |
| Control bracket | 3.0 Nm; 2.2 ft·lb |
| Crankcase cover | 25.0 Nm; 18.5 ft·lb |
| Cylinder head | 25.0 Nm; 18.5 ft·lb |
| Cylinder shield | 5.0 Nm; 3.7 ft·lb |
| Exhaust manifold / adapter | 19.0 Nm; 14.0 ft·lb |
| Flywheel nut | 135.0 Nm; 100.0 ft·lb |
| Flywheel fan | 16.0 Nm; 11.9 ft·lb |
| Fuel pump | 10.0 Nm; 7.4 ft·lb |
| Governor lever nut | 5.0 Nm; 3.7 ft·lb |
| Intake manifold to cylinder head | 10.0 Nm; 7.4 ft·lb |
| Muffler | 10.0 Nm; 7.4 ft·lb |
| Oil drain plug | 11.0 Nm; 8.1 ft·lb |
| Oil fill tube | 10.0 Nm; 7.4 ft·lb |
| Oil pump cover | 10.0 Nm; 7.4 ft·lb |
| Regulator / rectifier | 5.0 Nm; 3.7 ft·lb |
| Rewind starter | 3.0 Nm; 2.2 ft·lb |
| Rocker ball set screw or nut | 5.0 Nm; 3.7 ft·lb |
| Starter clutch | 88.0 Nm; 65.2 ft·lb |
| Starter motor | 16.0 Nm; 11.9 ft·lb |
| Rocker cover | 7.0 Nm; 5.2 ft·lb |
Service Information
| Engine | |
| Max speed | 3,600 rpm |
| Valve clearance | |
| Intake valve clearance | 0.08-0.13 mm (0.003-0.005 in) |
| Exhaust valve clearance | 0.13-0.18 mm (0.005-0.007 in) |
| Oil system | |
| Oil type | API SF, SG, SH, SJ or higher |
| Recommended oil |
Summer: SAE 30, 10W-30 Winter: SAE 5W-30 |
| Oil capacity (with filter) | 1.42 L (1.5 US. qt, 1.25 Imp. qt.) |
| Ignition system | |
| Spark plug | Champion RJ-19LM |
| Spark plug gap | 0.7-0.8 mm (0.0276-0.0315 in) |
Author:
Would like to know the p.t.o. length and diameter.
diameter is 1″
what is a replacement motor for this
Basically any B&S 12-16 HP with electric start and gravity feed carb.
I did replace one with a Kohler 17 HP, though it was “bolt in” it did require hood modification (too high and too long), rewiring the charge circuit, and redoing the throttle body. For most people just sticking with a same type B&S is the best bet. Carroll Stream probably has the most reasonable prices.
I this model engine Briggs 12.5 hp 289707 code 9311304E Type 011301 I am wondering if this engine has a voltage regulator and so far I have not found one. Thanks
Search on e-replacements for the tri-circuit. Here is the thing, if your flywheel is really stuck on, you can nuke the whole engine with hammering. I ended removing my flywheel eventually with a heat gun (be careful of the plastic ring gear), impact wrench, and $130 OTC bearing puller (used the H adapter). The engine failed shortly after the flywheel replacement. I really should have just gone with an external alternator instead of ruining a good running engine to replace the bad stator.
Thank you Mr. Wers for your website, it was helpful for fixing this old Briggs and Stratton 289707.
Hallo. Mein Motor geht nach ca. 15s aus. Kann sofort wieder starten mit Choke, geht wieder nach 15s aus. Ich habe alle Filter, den Vergaser, öl gewechselt. Keine Änderung. Hat der Motor eine Ölmängel Sicherung? Vielen Dank. Mfg rh
Bonjour je recherche un moteur moteur BRIGGS ET STRATTON Reference 286707 /type 1185-E1 / CODE 020430ZD
Simplicity Regent 12 Briggs 289707 running incredibly rough, smoking, stuttering, won’t throttle up, dies on choke. Replaced fuel filter, spark plug (it is sparking I checked), new fuel, tried starter fluid, sprayed carb cleaner (but it didn’t look dirty).
It did run 2 weeks ago just fine. Anyone have any suggestions?
Disassembled the carb and found that the jet was just floating free in the bowl and was not properly installed. Fixed that and it runs fine now.