Maintenance; Maintenance Schedule; Fuel And Oil Recommendations; Change Oil - Briggs & Stratton 405777 Series Manual

MAINTENANCE

Maintenance Schedule

Check oil level♦

Change oil

Change oil filter
Change air cleaner pre-cleaner
Change air cleaner cartridge
Clean cooling system
*
Inspect/clean spark arrester
(optional accessory)
Replace spark plugs
Replace in-line fuel filter
Remove combustion chamber deposits
♦ Change oil after first 8 hours, then after every 50 hours or every season.
*
Exhaust system supplied by equipment manufacturer.
Note 1 Change oil every 25 hours when operating under heavy load or in high temperatures.
Note 2 Clean more often under dusty conditions or when airborne debris is present. Replace air cleaner parts, if very dirty.

FUEL AND OIL RECOMMENDATIONS

Gasoline
We recommend the use of clean, fresh, lead-free gasoline,
and the use of BRIGGS & STRATTON GASOLINE
ADDITIVE, PART #5041. Leaded gasoline may be used if it
is commercially available and if lead-free is not available. A
minimum of 85 octane is recommended. The use of
lead-free gasoline results in fewer combustion deposits
and longer valve life.
NOTE: Some fuels, called oxygenated or reformulated
gasolines, are gasolines blended with alcohols or ethers.
Excessive amounts of these blends can damage the fuel
system or cause performance problems. Do not use gasoline
which contains Methanol.
If any undesirable operating symptoms occur, use gasoline
with a lower percentage of alcohol or ether. We also
recommend gasoline be purchased in small quantities, not
more than a 30 day supply. FRESH gasoline minimizes
gum deposits, and also will ensure fuel volatility tailored for
the season in which the engine will be operated.
Lubrication
Oil has four purposes. It cools, cleans, seals and lubri-
cates. During normal operation, small particles of metal
from the cylinder walls, pistons, bearings and combustion
deposits will gradually contaminate the oil. Dust particles
from the air also contaminate the oil forming an abrasive
mixture which can cause wear to all of the internal moving
parts of the engine, if the oil is not changed regularly. Fresh
oil also assists in cooling. Old oil gradually becomes thick
and loses its cooling ability as well as its lubricating
qualities.
Briggs & Stratton Intek™ OHV V-Twin engines are lubri-
cated with a gear-driven oil pump.
4
5 Hours
or Daily
D
TSM
25 Hours or 50 Hours or
Every Season Every Season
D Note 1
D Note 2
D
Oil Recommendations
We recommend the use of a high quality detergent oil
classified "For Service SE, SF, or SG" such as Briggs &
Stratton 30 Weight Oil Part #100005 or #100028. Deter-
gent oils keep the engine cleaner and retard the formation
of gum and varnish deposits. No special additives should
be used with recommended oils.
Change Oil
The crankcase capacity of Intek™ OHV V-Twin cylinder
engines is approximately:
4 Pints (1.9 liters) with filter
3-3/4 Pints (1.8 liters) without filter
RECOMMENDED SAE VISCOSITY GRADES
4-Cycle Intek™ V-Twin OHV Gasoline Engines
°
-20 0
F
°
C -30 -20 -10
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
* Air cooled engines run hotter than automotive
engines. Use of multi-viscosity oils (10W-30, etc.)
above 4° C (40° F) will result in high oil
consumption and possible engine damage. Check
oil level more frequently if using these types of oils.
** SAE 30 oil, if used below 4° C (40° F), will result in
hard starting and possible engine bore damage
due to inadequate lubrication.
100 Hours or
Every Season
D Note 1
D Note 2
D Note 2
D
D
**
*
20 32 40 60 80
0 10 20
500
Hours
D
100
30 40