User Manual

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Congratulations on your purchase of a Dynamite

Platinum Series (DPS

™

) .28 racing engine. Precision

manufactured and assembled, your DPS 28 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 can damage

your engine and immediately void any warranty.

We recommend using Dynamite Blue Thunder

™

Race Formula fuel 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 Platinum #3 glow plug

(DYNP5603) as the absolute best glow plug for this

engine. The Dynamite Platinum #3 Plug has been

designed to deliver an ideal balance of performance and

longevity.

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 DYN2614 as an excellent choice for a

quality air cleaner.

Carburetor Adjustments

Your DPS 28 engine comes equipped with a precision

slide-valve 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: 3

turns out (counterclockwise)

from closed.

Low-Speed Needle: 2 turns out (counterclockwise) from

closed.

Pull-start/Spin-start engines:

When using a recoil starter, never pull the rope out it’s

full length. 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 flooded (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. Use a glow plug wrench (DYN2510) to

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 a spin 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.

Platinum .28XP

Owner’s Manual

When checking the adjustment of the low-

speed needle, it is crucial that the throttle

slide is closed completely when turning the

needle and that you do not over-tighten the

needle. Use an engine tuning screwdriver 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

Non-pull-start engines:

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. Place your vehicle on

top of your starter box and engage the flywheel to your

starter wheel. Should the engine become difficult for

your starter box to turn over, the engine may be flooded

(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 glow plug wrench

(DYN2510), remove the glow plug and turn the model

upside down and rotate the flywheel to clear out the

fuel, re-install the glow plug and start again.

We recommend using the (DYNP5300) Quickfire Starter

Box to handle the high compression of the DPS 28.

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.

High-Speed

Needle Valve

Fuel Inlet

(Adjustable)

Idle Stop

Adjustment

Leaner

Faster Idle

(clockwise)

Slower Idle

(counterclockwise)

Low-Speed

Needle Valve

Low-Speed

Needle Valve

Summary of content (4 pages)

PAGE 1
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 DYN2614 as an excellent choice for a quality air cleaner. Carburetor Adjustments Platinum .28XP Owner’s Manual Congratulations on your purchase of a Dynamite® Platinum Series (DPS™) .28 racing engine.
PAGE 2
Do not skip this process of breaking in a new engine! Should you choose not to follow these procedures, you risk damaging your engine during 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.
PAGE 3
Warranty Period: Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the “Product”) will be free from defects in materials and workmanship at the date of purchase by the Purchaser. Limited Warranty (a) This warranty is limited to the original Purchaser (“Purchaser”) and is not transferable. REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER.
PAGE 4
Spare Parts Listing DYNP5332 DYNP5391 DPS .