O.S. Engines 21VZ-M - Manual (Page 5)

8
NOTES WHEN APPLYING
AN ELECTRIC STARTER
Do not over-prime. This could
cause a hydraulic lock and damage
the engine on application of the
electric starter.
If over-primed, remove glowplug,
close needle-valve and apply
starter to pump out surplus fuel.
Cover the head with a rag to
prevent pumped out fuel getting
into your eyes.
We do not recommend running your boat
on the sea, or in any other saltwater
environment. Under such conditions, it is
difficult to prevent the engine from
becoming corroded and, eventually,
inoperative.
NOTE
9
Standard accessories
Glow Plug P7 For T-type head
(Turbo head) 1piece
Cylinder-head gasket
(0.1mm) 1 sheet
Exhaust Seal Ring 1piece
Dust Cap 3, 16, 18
1piece each
(Medium Type)
INSTRUCTIONS
Flywheel No.2K Assembly
(Taper Collet,)
The
MAX-
21VZ-M is designed expressly
for 21 class boat racing. P7 Turbo plug
is supplied with the engine and also
water cooled plug cap is installed,
which improves power output, fuel
consumption and durability. Big bore
of 10mm 21D carburetor copes with
high nitro fuel. This engine offers high
racing potential maintaining O.S. tradi-
tional easy-to-handle characteristics.
Water Cooled Plug Cap
(Installed)
Head Gaskets
The engine is installed a 0.2mm thick head
gasket. If you find the following symptoms
after running the engine, add a 0.1mm thick
gasket supplied.
With the appropriate needle setting, engine
r.p.m. drop and power loses during running.
Composition and proportion of lubricant in the
fuel may affect the symptoms.
Glow plug burns out frequently.