Maintenance
•
Being a high performance 2 stroke engine, certain parts of your DA35 can wear quickly. Under normal operation,
pistons, piston rings, needle bearings, spark plugs, etc. may need occasional non-warranty replacement to insure
peak performance.
•
Screws can come loose! After a few flights check that all screws are secure. Periodically check that all screws are
tightened to the correct torque rating. It's recommended to replace, rather than re-use the red aluminum screws.
Size Torque specifications
Spark plug: CM-6, 10mm 90 in. lbs.
Steel prop bolts: M4x 40mm 65 in. lbs.
Aluminum crankcase bolts: M5x20mm 70 in. lbs. (Don’t re-use. Replace with new)
Aluminum cylinder base bolts: M5x13mm 70 in. lbs. (Don’t re-use. Replace with new)
Aluminum carb mount bolts: M5x55mm 50 in. lbs.*
*Caution: Care must be taken to not over tighten the carb mounting bolts. Over tightening can distort and damage the
injected molded reed valve parts and rubber gaskets.
•
Use a 4mm hex wrench for all M5 cap screws.
•
Use a 3mm hex wrench for all M$ cap screws
•
For spinner mounting, the crankshaft extension is threaded for M5 screws. In this application the 10-32 SAE
screws supplied with most spinners will work fine in the M5 threaded hole. Do not substitute 10-32 screws for any
other screws on the engine! 6
•
Inspect the engine periodically for any signs of fuel seepage. This can indicate an air leak which can create a lean
fuel/air ratio, which in turn can cause erratic running and engine damage. If tightening the appropriate screws
does not cure the problem, contact Desert Aircraft.
•
After prolonged use, carbon deposits can build up on top of the piston and on the combustion dome of the
cylinder. Great care must be taken when trying to remove these carbon deposits to avoid damaging the parts.
Once an attempt to remove carbon has been made, the task must be completed, as any remaining carbon may
be loosened and can dislodge while the engine is running. This can damage the engine and/or bridge the spark
plug.
Manuals may be updated with additional tips and trouble-shooting info from time to time. Please check our web site,
Remember! This motor can stop at any time, for a variety of reasons. Do not fly your plane in a way
that damage or harm will result if the motor stops running. If you cannot safely fly your plane if the
engine stops for any reason, do not fly the plane.
Desert Aircraft will not be responsible for damage caused in engine–out situations.
DA35 WARRANTY
Your DA35 engine and ignition system are covered with a 3 year warranty by Desert Aircraft, starting from the date of purchase.
•
This warranty covers defects in workmanship and materials only.
•
Do not disassemble the motor or ignition system. Disassembly of the motor or ignition system can void the warranty on that item.
•
Any modifications to the motor, or the ignition system, or the use of aftermarket parts, other than those authorized by Desert Aircraft,
will void this warranty.
This warranty does not cover the following:
•
Shipping expenses to and from Desert Aircraft for warranty service.
•
Damage caused by improper handling, operation, or maintenance.
•
Damage caused by a crash.
•
Damage caused by using improper fuel or additives.
•
Damage incurred during transit to Desert Aircraft. WRAP AND PACK ENGINE CAREFULLY!!
NOTE: DESERT AIRCRAFT WILL NOT SHIP OR REPLACE ANY WARRANTY REPLACEMENT ITEMS
UNTIL ITEMS IN QUESTION ARE RECEIVED BY DESERT AIRCRAFT AND DEEMED DEFECTIVE.
DESERT AIRCRAFT
1815 S. Research Loop
Tucson, AZ 85710 USA
Ph 520 722 0607 Fax 520 722 5622
Email [email protected]
Web www.desertaircraft.com
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