User Manual

GS R/C

DLA ENGINE OPERATING-INSTRUCTION

MANUAL

08/20/2014 Copyrighted Material

Page - 29 DLA 32, 58, 64, 116, 116-I2 & 128cc Rev. A.05.01

Use of propeller sizes other than those specified above may either “load” or “un-load” the engine

and cause damage. Un-loading the engine has the greater potential to increase the engine’s rpm

higher than recommended or safe for the engine. The prop type and styles may have the same

“loading” and “un-loading” effect, so always check the engine’s rpm with a tachometer. ALWAYS

CHECK AND RE-TIGHTEN THE PROP-BOLTS AFTER EVERY TWO OR THREE FLIGHTS.

DRILLING PROPELLER:

The most reliable, consistent and safe way to drill the prop-bolts hole in the propeller is the use

the GS R/C – DLA PROP HOLE DRILL GUIDE. Any other method is not recommended and can

produce results that are unpredictable and potentially dangerous.

1. Place the GS R/C-DLA Prop drill guide into the propeller’s center hole. Often, propellers

have the center or crankshaft hole pre-drilled to ten (10) mm diameter. If the prop’s

center hole is not ten (10) mm, it must be drilled to 10 mm. Use only a self-centering 10

mm drill bit to produce the center hole of the proper diameter.

a. Drill the first prop-bolt hole using a drill press.

b. Use a wood back up plate under the propeller to help prevent splintering the

backside of the prop-hub.

2. Place the alignment pin in the hole just drilled, passing it through the Drill-Guide and into

the prop. This secures the Drill-Guide.

3. Drill remaining holes.

DRILLING SPINNER BACK-PLATE:

Most spinner back-plates are not specific as to the angular position of the back-plate relative to

the spinner cone and thus the prop-hole locations in the back-plate are not critical. Some back-

plates are solid and some have multiple holes in them for lightening. In the case of the ones with

lightening holes, check to see if the existing holes will align with those required for the prop bolts.

Otherwise, use either the PROP-BOLT DRILL BIT GUIDE or the engines front prop washer to

mark the hole locations and drill with at least one to two (1 -2) millimeter clearance all around.

When mounting the spinner, be sure the spinner back-plate holes are not in contact with the prop

bolts.