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Congratulations on your purchase of a Mach 15RE
engine! Precision manufactured and assembled, your
Mach 15RE
will provide you with trouble-free
performance if you read and follow these instructions.
Using the Proper Fuel and Glow Plug
Using the proper fuel and glow plug is critical in order to
achieve maximum performance and reliability. You must
use fuel, glow plugs and air filters that are specifically
designed for model car/truck/buggy applications. Never
use any type of model airplane glow fuel. Use
of model airplane fuel will damage your engine and
immediately void any warranty.
We
recommend using Blue Thunder or Blue Thunder
Race Formula blend fuels with 20% nitro, providing the
best combination of power and fuel economy. Dynamite
®
Blue Thunder Fuels are vigorously tested, researched
and formulated to deliver excellent power as well as
engine protection.
A glow plug has been included and is ideal for breaking-in
your new engine. In fact during the break-in procedure, it is
not uncommon to go through one or two glow plugs, as
microscopic bits of metal (from the cylinder/piston wearing
in) bond themselves to the plug element causing glow plug
failure. We
recommend the Dynamite MC-59 McCoy
Power Plug (DYN2508) as the absolute best glow plug for
this engine. Delivering an ideal balance of performance and
longevity, this is the same glow plug that continues to win
races at every level of competition, from
local events to
World Championships.
All car engines must use a properly oiled air filter to keep
dirt out of the engine. Any dirt that enters the carburetor
can immediately destroy your engine! We
recommend
DYN2503 or DYN2504 as excellent choices for quality
air cleaners.
Carburetor Adjustments
Your Mach 15 RE engine comes equipped with a
precision rotary-type carburetor. Take a moment to review
the pictures below to familiarize yourself with the various
functions of the carb. Loosening the nut located on the
side of the crankcase under the carburetor body will allow
you to rotate the carburetor. Make certain to mount the
throttle arm to the side required by your particular vehicle.
Although preset at the factory,
some changes in the
needle setting can occur during shipping and handling.
We
suggest the following settings for breaking-in
your engine:
High-Speed Needle:
31/4turns out (counterclockwise)
from closed.
Low-Speed Needle:
3 turns out (counterclockwise)
from closed.
When checking the adjustment of the low-speed
needle, it is crucial that the throttle barrel is
closed completely when turning the needle
and that you do not over-tighten
the needle.
We
suggest using a Dynamite®engine-tuning
screwdriver (DYN2775) to make this job easier
.
When you feel resistance in the needle,
immediately stop turning and begin turning the
needles counterclockwise, counting the number
of turns from “closed.”
Starting Your Engine For The First Time
The first start of your engine is the most critical time of
the engine’s life, dictating how well it will perform. After
installing the engine in your model and inserting the glow
plug, turn on your radio system and attach a glow igniter
to the glow plug.
When using a recoil starter, never pull the rope
out to its full length, as doing so may cause
damage and recoil starter failure. Quick, short
pulls of the recoil starter are the best technique
to use. Never extend the starter rope more than
12 inches.
Should the pull-starter be extremely difficult to pull (will
not extend out of the assembly), the engine may be flood
ed (hydro-locked). Excess fuel between the cylinder head
and piston will not allow the piston to travel through its
full range of compression, effectively “locking up” the
engine. Should this occur, immediately remove the glow
igniter from the plug. Using a quality glow plug wrench
(DYN2510), remove the glow plug and turn the model
upside down. Give the recoil starter a few short pulls to
clear out the fuel, re-install the glow plug and start again.
We
recommend using an electric starter or starter box for
the initial starts, even with a pull-start equipped engine.
You may need to “blip” the throttle on the transmitter
(applying throttle on/off) while trying to start the engine,
as new engines are more difficult to start due to the tight
piston/cylinder fit. Never start an engine above
1
⁄4 throttle. Immediate damage to your engine
can and will occur
.
When the engine starts, the exhaust should emit
lots of blue/white smoke, indicating that the engine is
excessively rich (a good thing during break-in). During
the first tank of fuel, you may wish to set a higher than
normal idle speed and/or leave the glow plug igniter
attached in order to keep the engine from stalling. Drive
your vehicle around while “blipping” the throttle and
avoid operating the engine at full throttle for more than
2–3 seconds at a time. Consume the entire first two tanks
of fuel in this manner
.
After the first two tanks of fuel, begin leaning out the
high-speed needle valve 1/8 turn at a time. It generally
takes about 5 or 6 tanks of fuel before you’d want to start
tuning for “maximum” power. Do not skip this
process of breaking-in a new or rebuilt engine.
Should
you choose not to follow these procedures,
you risk damaging your engine in the first tank
of fuel.
Your patience during these procedures will be rewarded
by an engine that performs reliably and to its maximum
power potential. First run attempts can be more frustrating
than with other (less powerful) sport engines, so take
your time—it will be worth the wait.
Glow plug failure is a common occurrence when breaking
in a new engine. To
test your plug, let the engine idle at
a properly adjusted low-speed needle setting with the
glow igniter attached. Then, remove the igniter. If you hear
no appreciable change in engine rpm, then the plug is
still good. If the engine loads up and the rpm’s decrease,
it’s time to replace the glow plug.
Setting the Needle Valves
When tuning the needle valves for maximum
performance, adjust them is small increments,
1
⁄8turn
at a time.
An engine should not be run too lean; doing so severely
shortens the life of the engine. When an engine is set too
lean, it will run very strong at first but will soon begin to
sag and hesitate or stall when accelerating.
The best way to tune an engine is by using an infrared
temperature gauge, but you can also use water to check
the head temperature. (Refer to “Tuning the High-Speed
Needle” below.)
Tuning the High-Speed Needle
To obtain the correct high-speed needle setting, start the
engine and drive your vehicle around for a minute or two,
applying full throttle for periods of 5 seconds or more.
Place a drop of water on the cylinder head. If the water
sizzles away (evaporates immediately) the needle setting
is too lean. A correct needle setting will result in the water
evaporating after 3-5 seconds. If the water does not
evaporate, chances are good that the needle setting is too
rich. Lean the needle 1/8 of a turn and run the engine
again, adjusting the needle setting to get the desired
evaporation time. Check the temperature each time
you change the needle mixture. Do
not let the
engine overheat, as this will
damage the engine.
Tuning the Low-Speed Needle
The low-speed needle (also referred to as the idle mixture
or idle needle) should be set after you’re satisfied with
the high-speed needle setting. After achieving the proper
operating temperature, reduce the engine throttle to idle
and pinch the fuel line for 3-5 seconds with your fingers
close to the carb fuel inlet nipple. If the engine dies
immediately, the low-speed needle is set too lean.
If the rpm’s increase dramatically, the setting is too rich.
The ideal setting results in the rpm’s increasing just
a slight amount after pinching the fuel line.
MACH .15RE
Owner’s Manual
Leaner
Low-Speed
Needle Valve
High-Speed Needle Valve
Idle Stop Adjustment
Fuel Inlet
(Adjustable)
Faster Idle
Slower Idle
Leaner
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Idle Stop Adjustment
The last setting to be made is the idle stop screw. Turning
this screw clockwise increases the idle speed; whereas
turning the screw counterclockwise will make the engine
idle at a lower speed. Ideally, the engine should idle just
fast enough to be reliable in acceleration and transition
from idle to full speed.
Avoid an idle speed that is too
fast, as it will cause damage to your clutch.
Engine Maintenance
Periodic maintenance must be performed in order
to keep your engine in proper operating condition. After
each day of running, it’s critical to use high quality after
run oil to protect the internals of the engine and protect
them against corrosion. The methanol used in the fuel
attracts moisture that can cause corrosion (particularly in
the ball bearings). We
recommend Blue Thunder™ Final
Run (DYN2255) as it’s specifically formulated to protect
your engine between uses. Follow these steps after
running your engine:
1) Empty all fuel from the tank and fuel lines
2) Use Final Run fuel following the instructions on
the container
3) Clean and inspect the engine, air cleaner and
fuel system
Troubleshooting Guide
Problem
Engine won’t start
Engine starts, then dies
Engine starts and runs
for
1
⁄2 tank, then quits
Spare Part Listing
LOSR6535 Complete Pull Starter: Mach 15RE
LOSR6536 PS Backplate: Mach 15RE
LOSR6537 PS One-way Bearing: Mach 15RE
LOSR6538 PS Shaft: Mach 15RE
LOSR6539 PS Cushion Spring Mach 15RE
LOSR6540 PS Screw Set: Mach 15RE
LOSR6541 PS Handle Set: Mach 15RE
LOSR6542 PS Recoil Spring: Mach 15RE
LOSR6543 PS Rope & Pulley: Mach 15RE
LOSR6548 Carb Retainer Post & Nut: Mach 15RE
LOSR6552 Throttle Barrel: Mach 15RE
LOSR6553 Throttle Barrel Boot: Mach 15RE
LOSR6554 Throtle Arm W/ Nut: Mach 15RE
LOSR6555 High Speed Needle
Valve: Mach 15RE
LOSR6556 High Speed Needle Holder: Mach 15RE
LOSR6557 High Speed Assembly
Washers: Mach 15RE
LOSR6558 Fuel Inlet Nipple: Mach 15RE
LOSR6559 Low Speed Needle
Valve: Mach 15RE
LOSR6564 Rotary Carburetor: Mach 15RE
LOSR6565 Complete O-Ring Set: Mach 15RE
LOSR6580 Cylinder Head: Mach 15RE
LOSR6581 Combustion Head Button: Mach 15RE
LOSR6582 Head Shim .1mm: Mach 15RE
LOSR6583 Head Shim .2mm: Mach 15RE
LOSR6584 Piston/Sleeve: Mach 15RE
LOSR6585 Wrist Pin: Mach: 15RE
LOSR6586 Wrist Pin Clips: 15RE
LOSR6587 Connecting Rod: Mach 15RE
LOSR6588 Front Bearing: Mach 15RE
LOSR6589 Collet: Mach 15RE
LOSR6590 Crankcase: Mach 15RE
LOSR6591 Header Seal: Mach 15RE
LOSR6592 Rear Bearing: Mach 15RE
LOSR6593 P/S SG Crankshaft: Mach 15RE
LOSR6594 Idle Screw: Mach 15RE
LOSR6595 O Ring Set: Mach 15RE
Warranty
Mach 15 RE engines are guaranteed against original
defects in materials and workmanship for a period of
90 days from date of purchase. Mach 15 engines are of
excellent quality and designed to provide many hours
of racing enjoyment. If cared for properly, these engines
are extremely durable. However, normal “common sense”
care must be given to your engine in order to maximize
its performance and service life. The following
conditions/problems cannot be covered under warranty:
• Recoil starter
•Damage due to lack of maintenence
• Rusted bearings
• Crash-related damage (over-revving, runaways,
free-wheeling, etc.)
• Damage due to use of improper fuel or glow plugs
• Damage due to lean runs (seized connecting rods,
pistons, etc.)
• Damage caused by dirt or foreign objects being
ingested into the engine
• Damaged from improper disassembly or reassembly
• Modification of any kind
• Normal engine wear
Should you need to send your engine in for warranty or
non-warranty repairs, please follow these steps:
1) Ship your engine (in its original box) packed
inside a sturdy box, freight prepaid to:
Horizon Service Center
ATTN: MACH 15 RE Service
4105 Fieldstone Rd.
Champaign, IL 61822
2) Include a note containing a brief summary of the
problems you are experiencing with your MACH
.15 RE engine. Please tell us:
• Nitro content and brand of fuel used in
the engine
•
Type of glow plug used
• Type of air cleaner used
• Approximate running time on the engine
prior to difficulties developing
Date your correspondence and include your return
shipping address, as well as a daytime telephone
number and e-mail address (if applicable).
3) Warranty Repair
If you believe that the problem(s) with your
engine are covered under warranty, you must
include your original dated sales receipt to verify
proof of purchase date. Providing the conditions
of warranty have been met, your engine will be
repaired without charge.
4) Non-Warranty Service
Should your repair costs exceed $50.00, you’ll be
provided with an estimate advising you of your
options. Any charges for return shipping of nonwarranty repairs will be billed to you.
5) Payment Method
Please advise the Horizon Service Center
of the method of payment you prefer to use.
The Service Center accepts Visa or Master Card.
When using credit cards, please include your
card number, expiration date and the name
as it appears on the card.
Possible Cause/Solution
• Reset needles to the
factory setting
• Incorrect needle settings
• Out of fuel/old, bad or
improper fuel
• Clogged fuel line
• Bad or improper glow plug
• Glow igniter not charged
• Engine flooded
• Pressure line blocked or
disconnected
• Bad glow plug
• High-speed needle too lean
• Hole or tear in fuel line
• Bad glow plug idle speed set
too low
• Overheated engine
(too lean)
• Improper needle settings
Mach 15 engines are manufactured in Taiwan and
distributed worldwide by
Horizon Hobby, Inc.
4105 Fieldstone Rd.
Champaign, IL 61822
www
.horizonhobby.com
7527
© 2005 Horizon Hobby, Inc.
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