GPOWER F-50R Operating Instructions Manual

FOUR-STROKE GASOLINE ENGINE

15mm

O10mm

O5mm

80mm

76mm

127mm

129mm

=55mm

.
.

Displacement : 49.87cc

Practical rpm : 1200~7000rpm

Suggested Props : 20~21X10

20X10=6800rpm

.
.

Gasoline/Oil Mix : 20:1

Specifications :

Weight : 1500g

Operating Instructions

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100% CNC ENGINE BLOCK

HAND ASSEMBLED

100% CNC ENGINE BLOCK

HAND ASSEMBLED

H

High Speed Needle

Low Speed Needle

L

1.Engine assembly.

H=1

2

1

+

2

1

L=1

2

1

+

2

1

2.Valve clearance adjustment

The valve clearance should be checked and adjusted after 2 hours of break-in and again after 5 hours.

0< t <0.1mm

3.Recommended Fuel

The factory recommended fuel is high octane (premium) pump gasoline. Av-Gas is not recommended.

4.The carburetor adjustment

5. Ignition system

Please refer to the ignition system manual.

6.Propeller Installation.

The recommend prop size is 20x10 or 21x10. The propeller must be attached with six 4mm bolts.

8< L <14mm

Tighten the exhaust header locking nut by

Loosen the valve rocker adjustment nut

a. Remove the spark plug and rocker arm cover.

b. Adjust the valve clearance.

C. After the gap is checked and adjusted,

* The gap should be between 0mm and 0.1mm (.004”).

a.To drill the prop holes, fix the prop washer

b.Drill holes with 4.1mm, .1614”,

*Prop thickness will be vary by type and brand.

Prop hub thread depth:

tapping the wrench/spanner with a small hammer.

After that, they should only need occasion inspection and adjustment.

Turn the crankshaft until the piston is at Top

Dead Center.

tighten the lock nut securely.

The gap should never exceed 0.1mm (.004”)

Mix the gasoline with high quality 2 stroke oil at a ratio of 20:1.
For example: 1 liter of gasoline mixed with 50c.c 2-stroke engine oil, or 1 gallon of gasoline mixed with 6.4 oz. of 2 stroke oil.

The threads of these 4mm bolts must screw in at least 8mm deep into the hub.

on the prop temporarily with a small amount

of CA glue.

or #20 drill.

14mm (.55”)

Please use the correct screw length to
insure ample thread engagement in the prop hub.