HPI Racing K 4.6 Big Block engine Bedienungsanleitung Seite 6

8
Maintenance
Glow Plug 50-7-35
How Glow Plugs Work:
Unlike full sized car engines that use spark plugs and a distributor to fire the cylinders in the combustion cycle, glow engines rely on glow plugs. In a Nitro engine, ignition is initiated by
the application of a glow igniter. When the igniter is disconnected,
engine running. Ignition timing in a glow engine is automatic. At higher RPM's the plug becomes hotter, firing the fuel/air mixture earlier, effectively advancing the timing. At lower RPM's
the plug becomes cooler, firing the fuel/air mixture later, effectively retarding the timing. Since the glow plug performs so many important functions, proper plug selection and maintenance
are crucial to a properly running engine.
Outdoor
Glow Plug Glow Plug Temperature
50—735
GLOW PLUG
n 705
Cold
Medium plug for. 12-.15/.21
Standard replacement for Nitro Star 12RSS,SC,12RXS, 15 FESS, 18SS,21BB engines
n 502
+075—12RSS/SC.
GLOW PLUG
Medium cold plug for .25 engines
Standard replacement
n 503
GLOW PLUG
•20—7-37
Cold plug for summer/hot conditions
Standard replacement
Hot
+0Ä5—T15,
When to replace the glow plug:
Fuel and temperature will have an effect on the performance, reliability, and life span of the glow plug and
therefore should be considered expendable engine components. Aside from burnout or plug failure, there
are several signs that can indicate the plug should be replaced.
* Plug filament/plug body is discolored or the surface is rough.
* Engine cuts out when idling.
Air Filter
Proper Air Filter Maintenance:
Dirt is the biggest enemy of a nitro engine and proper air filter maintenance
your engines longevity. If you are using the air filter supplied with your kit, we recommend cleaning the element after every run. If
you are using an after market air filter, please follow the manufacturers
check the element after every run to make sure it is properly seated in the filter body and that the body is fully seated on the carburetor.
Never run the engine without the airfilter!
Rots-at-a,
Reinstalling The Air Filter:
After properly cleaning the filter element make sure it is reinstalled correctly.
If you are using the filter that came with your kit, follow the illustration to reinstall
the filter element in the filter body. Make sure there are no gaps between the
elementandbody.Makesurethefilteris fullyseatedon thecarburetor andsecure Z224
it with a tie strap (HPI part #6154). Never run the engine without the air filter!
hpi•racing
Characteristics
MEDIUM R3
engines
f2RXS, 15FE/SS. 18SS,
MEDIUM COLD R4
for Nitro Star $25 engines
COLD R5
R5
for Nitro Star T15, K4.6 engines
* Plug filament is distorted or bent.
* Engine becomes difficult to start.
is one of the most important
recommendations.
Cleaning
Remove and clean the air filter with nitro fuel when soiled. Spray fuel through the clean side to ensure proper dirt removal.
Squeeze the filter to remove excess fuel. To re-coat the air filter with oil, place the element in a plastic bag with several
drops of air filter oil. Using your fingers, work the oil into the element making sure it is evenly distributed.
M3x8mm
Z543
M3x10mm
-ZI_JC,
the heat inside the combustion chamber keeps the glow plug filament glowing, firing the next cycle thereby keeping the
Proper Glow Plug Selection:
Proper glow plug selection depends on several factors. Fuel type, nitro methane content, weather, and
altitude can drastically effect performance.
for your driving condition is the key to getting the maximum performance out of your Nitro Star Engine.
Extending the life of your Glow Plug:
To maximize and extend the life of your glow plug follow these simple tips:
* Remove the glow igniter when using more than 1/2 throttle or if the engine does not start after a few seconds.
* Do not run the engine lean. Lean conditions will overheat the plug causing the element to be damaged or fail.
* Use the best Fuel/Plug combination for your driving conditions.
* Use a fuel that has a lower nitro content.
Glow Plug
Hot!
50—735
Glow Plug Igniter
-5353—29—
factors that will effect
Regardless, it is always a good habit to
The Filter Element:
87204b
87204a
87199a
0
615
6/16
Finding the best combination of fuel and plug temperature
Element
Good plug Bad Plug
Element glows when tested. Element may be damaged
or broken if it doesnt nght
up te/y_
Never run the engine without
< ego i!
6154
87199c
87199d
87199b
Note: Hinweis:
0K!
Bad Plug
Element is brcw.en or
doesnt light up at am
the air filter!