GENERAL ENGINE OPERATION
Fuel—Please use non Ethanol 92 or 95 Octane fuel with an oil rao of 30:1 for general use. 40:1 may be
used once the engine is run in and if you a re using a high quality fully synthec oil. Do not use dierent
types or brands of engine oil. Doing so may cause carburetor fouling. We recommend 30:1 full synthec
for break in and. Aer the engine has been run for a period of 2 to 3 hours you can decrease oil to 40:1
full synthec oil. For prolonged life we do recommend 30:1.
Breaking-in - Start the engine and (if necessary) adjust the idle mixture (low speed mixture screw). Idle
unl the engine warms and slowly increase the RPM. DON’T be tempted to run at full throle for the rst
tank of fuel. Run at short bursts of 1 or 2 seconds at up to 4500RPM and back to mid throle then to idle.
Connue with this process for 2 hours while gradually increasing the upper RPM and duraon of high
RPM. If the engine sags in RPM when run at high RPM throle back immediately. Stop the engine and ad-
just the high speed mixture screw 1/8 of a turn out. Restart and retest the engine.
Low RPM running- don’t be tempted to let the engine run at low speed for an excessive amount of me
as this may create carbon build up on the spark plug.
Fuel Line– Periodically (or if running become errac) check the fuel line for possible pin holes or air leaks.
NOTICE: The carburetor fuel screen should be cleaned periodically. Carefully remove the pump cover
(inlet side of the carburetor), gasket and pump membrane. The screen will be visible and can be cleaned
WARRANTY INFORMATION
All the DLE engines enjoy one year parts and labour warranty when run as per factory instrucons, used
with specied propellers, correct lubricants and lubricant raos.
Your new DL engine number and purchase date will be recorded for warranty purposes. Please also retain
your purchase invoice as addional warranty proof.
PLEASE NOTE: The following uses may/will damage the engine and are not covered by warranty.
* Running a DL Engine without oil or too lile oil.
* Running the engine with incorrect sized propeller. Oversized propellers can increase stress and wear on
internal components and give poorer torque and thrust performance.
* Undersized propellers may cause too high RPM and over stress the engine.
* Running the engine without adequate cooling may cause overheat damage. Please ensure the engine
has adequate ducng to force air over the cylinder cooling ns with a minimum 1:3 cooling air Inlet to
outlet rao recommended. Addional venturi ns on the air outlet will assist to draw air.
Please Note: Simply mounng an engine in the engine cowl without proper ducng is considered inade-
quate cooling.
Contact Details
BOOMA RC
P.O Box 1 Oak Flats NSW 2529
Telephone: 02 42 955 287
www.boomarc.com
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