Experience precision engineering with the RETROL Gas 4.2CC OHV V-Twin Miniature Shovelhead R31 engine model. This four-stroke internal combustion engine offers a detailed and functional design, perfect for enthusiasts and collectors seeking a high-quality miniature engine.

Product parameters:
Brand: RETROL;
Item No.: R31;
Material: brass, stainless steel;
Color: Brass, Silver;
Overall size: 150*120*140mm;
Engine size: 120*90*110mm;
Wood base size: 150*120*30mm;
Ratio: 1:5;
Weight: 1200g;
Form: ready to run;
Type: two-cylinder four-stroke gasoline engine;
Displacement: 4.2CC;
Cylinder diameter: 13mm;
Stroke: 16mm;
Cooling method: air cooling;
Start mode: electric drill start/manual start;
Ignition method: CDI electronic igniter;
Spark plug type: 3/16-40 inch threaded spark plug;
Lubrication method: mixed/splash lubrication (gasoline/oil=25/1);
Fuel type: 95# gasoline;
Oil type: 2T engine oil;
Starting power supply: 4.5V AA battery *3 (not included);
Suitable age: 14+;
Packing method: gift box;
Packing list: engine*1, electric drill coupling shaft (starting rod)*1, hand puller*1, spare O-ring*1set, manual*1.

RETROL Gas 4.2CC OHV V-Twin Miniature Shovelhead

Features:
1. This is a miniature gasoline engine model based on the V-twin motorcycle shovel engine in the 1960s. It embodies the spirit of different ages in a fantastic way.
2. The machine with retro charm, classic fuselage lines, cold cooling structure, new carburetor design, toggle throttle lever, can restore the details of the real engine, which is one of the most complicated engines we have produced.
The machine with retro charm, classic body lines, cold cooling structure, brand new carburetor design, toggle throttle lever, upgraded valves for intake and exhaust, obvious power improvement, and can restore the details of the real engine. This is our One of the most complex engines ever produced.
3. Every part of the engine has been carefully designed and processed by us. It is machined from brass and stainless steel and has a wooden base for easy positioning and maneuvering, ensuring smooth operation.
4. The engine is ready to run at any time, including starting and ignition equipment, which is more friendly to novice model enthusiasts. When it works, you won’t be disappointed. You’ll be amazed at how well it works.
5. It has become a coveted collectible, worth displaying and playing with. Whether it is for personal use, or as a personalized high-end model gift to friends on major festivals, it is suitable for family members.
Precautions:
1. When the ignition device is normal and the cylinder compression is normal, if the machine cannot start normally, it is likely that the carburetor needle needs to be adjusted.
2. After tightening the main oil needle on the carburetor, loosen 1/4 turn, start the flywheel, so that the mixing ratio of gasoline and air reaches the normal working mixing ratio after several times.
3. When the machine stops, the power switch should be turned off.