Gasoline Engine Owner’s Manual DuroMax Customer Service info@duromaxpower.com or call 844-DUROMAX Monday - Friday 7am to 5:00pm. PST Product Support (Product: information, application, service info & warranty questions) support@duromaxpower.com or call 844-DUROMAX Monday - Friday 7am to 5:00pm. PST This manual provides information regarding the operation and maintenance of these products. We have made every effort to ensure the accuracy of the information in this manual.
CONTENTS SAFETY PRECAUTIONS ............................................................................................................................................ 2 PARTS DESCRIPTIONS .............................................................................................................................................. 3 BATTERY CONNECTION (electric-start type).......................................................................................................... 4 PRE-OPERATION INSPECTION....
SAFETY PRECAUTIONS WARNING: Before operating the engine, be sure to read and familiar with the manual carefully, otherwise personal injury or equipment damage may produce. Please pay special attention to the following: 1. Running the engine in a well-ventilated place, keep it at least one meter away from building walls or other equipments, keep away from inflammables such as gasoline, matches and so on to avoid possibility of fire. 2. Keep the engine out of reach of children and pets to avoid accidents. 3.
PARTS DESCRIPTION The main parts of engine are located as follows 3
BATTERY CONNECTION (electric-start type) In the case that the specifications of the battery are 12V and more than 18A.h connect its positive lead to the electromagnetic coil while connect its negative lead to engine mount strew, base screw or any place capable of grounding with the engine well. Make sure the battery leads are connected tightly and no corrosion is found. If any, eliminate it. WARNING: ● The battery may give off explosive gas; keep sparks, flames and cigarettes away.
selected in accordance with our recommendation. Check 1. 2. 3. 4. 5. Ensure that the engine is stopped on a level ground. Remove the dipstick and clean it. Reinsert the dipstick into the oil filler without screwing it, and check oil level. If the oil level is too low, add the recommended engine oil up to the oil filler neck. Reinstall the dipstick. CAUTION: Run with insufficient engine oil may damage the engine severely.
Dismantle the air cleaner housing and check its filter element, make sure it is clean and intact, otherwise clean or replace. IV. Oil-bath type 1. Dismantle the air cleaner housing and check its core, make sure it is clean and intact, otherwise clean or replace. 2. Check oil level and oil quality. If the oil level is too low, add the recommended engine oil up to oil level mark. CAUTION: Never run the engine without an air cleaner, or severe wear of the engine may result.
Check 1. Remove the fuel filler cap and check fuel level. 2. If the fuel level is too low, refuel the tank. Remember adding fuel not over the fuel filler shoulder. WARNING: ● Gasoline is extremely flammable and is explosive under certain conditions. Refueling in a well-ventilation area with the engine stopped. Do not smoke and smoke and allow flames or sparks in the area where gasoline is stored or where the fuel tank is refueled. ● Do not overfill the tank (there should be no fuel in the filler neck).
up until feeling anti-action, and then make a rapid pull. CAUTION: Releasing the handle suddenly may make it hitting the engine. Release the handle slowly conforming to its recoiling force. b) Electric starter Push the engine switch to “START”and remain there until the engine starts. Once the engine starts, reset the engine switch to “ON”. CAUTION: Use the engine switch not more than 5 minutes each time to avoid damage of the engine. Try once more 10 minutes later after last attempt failures.
crankcase is too low, the engine oil alarm will stall the engine automatically to make it free of damage while the engine switch is still at “ON”. CAUTION: If cannot restart the engine, check the engine oil level first before go to other check items. BREAKER (Electric-start type) The breaker will cut off automatically to protect the charging circuit of the battery in the case that short circuit or incorrect connection of the battery poles occurs.
smoke while carbon monoxide is toxic, so exhaust control of them is very important. The company decreases the exhaust emissions by introducing poor-fuel carburetors and other devices into the engine to solve the problem. To keep the exhaust of your engine with in the standard exhaust emission, pay attention to the following: 1. Maintenance Maintain the engine periodically in accordance with the maintenance schedule in the manual.
Air cleaner Deposit cup Spark plug Spark eliminator Idling Valve clearance Fuel tank & fuel filter Fuel supply line Check Clean Replace Clean Clean, adjust Replace Clean Check-adjust Check-adjust √ √① √②* √** √ √ √ √ √② √② √② Clean Check Every two years (do a replacement if necessary) CAUTION: Use only parts from the company or equivalents in quality; otherwise engine damage may result. NOTE: *: only for inside-ventilating double-core carburetors. **: only for paper core air cleaners.
1. Turn off the oil filler cap and drain plug to drain engine oil thoroughly. Reinstall the drain plug and screw in securely. 2. Fill the specified engine oil up to the upper level mark. 3. Reinstall the oil filler cap. Engine oil capacity in the reduction gear box is 0.3 0.5 liters, engine oil capacity in the crankcase is 0.6(1.1) liters. NOTE: Do not dump oil containers or discarded engine oil into rubbish boxes or onto the ground.
clean engine oil until saturated. Squeeze out excess oil, otherwise, the engine will discharge smoke in starting stage. b) Paper filter element: knock the core against a solid plane to got rid of accumulated dust or blow out dust from inside to outside with high-pressure air flow (not more than 30psi). Never clean with a brush, as brushing may force the dust into the core fiber. If the core is extremely filthy, replace with a new one. 2.
Proper spark plug clearance ensures the engine’s normal running under no deposit around the spark plug. 1. 2. 3. 4. 5. 6. Warning Be careful not to touch the muffler during or just after running the engine. Remove the spark plug cap. Clear away dirt around the spark plug base. Dismantle the spark plug with a spark plug wrench. Clean with a steel brush. If the insulator is damaged, replace the spark plug instead. Measure the spark plug clearance with a feeler. The clearance should be 0.7~0.8mm.
TRANSPORT, STORAGE AND REMOVAL FROM STORAGE TRANSPORT Transport with the fuel cock turned off. Transport or store the engine when it is cool so as to avoid getting burns or fire. CAUTION: Do not incline the engine so as to avoid fuel’s spill. Spilled fuel or fuel vapor may ignite to cause fire. STORAGE If the engine is not kept in use for a long time, be sure to store it properly. Make sure the storage area is dry and free of dust. 1. Drain the fuel ... a.
REMOVAL FROM STORAGE Before reusing, service the engine in accordance with the instruction of the table STORAGE TIME SERVICE ITEM Within one month Non Drain out original fuel of the fuel tank and One ~ tow months refuel Drain out original fuel of the fuel tank and Two month ~ one refuel; Drain out fuel in the carburetor①; year Empty the deposit cup② Drain out original fuel of the fuel tank and refuel; Above one year Empty the fuel cup in the carburetor①: Empty the deposit cup② ⑴ Screw off the drain plug and
SPECIFCAIONS MAIN SPECIFICATIONS Model XP7HP Items Engine type bore×stroke(㎜) Rated power(kW/rpm) Max. torque(N·m/rpm) Displacement(ml) Starting type Ignition type Lubricating type Fuel consumption (g/kW-h) Dry weight Dimension(L×W×H )(in.) XP7HPE XP16HP XP16HPE 4-strok, OHV,25°,single-cylinder, force air-cooled 70×54 90×66 90×66 4.2/3600 8.5/3600 8.5/3600 13.2/2500 28.5/2500 28.5/2500 208 420 420 Electric start recoil Electric start Induction ignition splashing recoil ≤395 33lbs. 35.3lbs.
supply. 1. 2. 3. 4. 1. 2. 3. 4. 1. 2. 3. 4. 1. 2. 3. Needle valve is not closed properly or start hole is clogged. Float is damaged or sticking. Normal cylinder Fuel is too filthy or compression. deteriorated Normal spark plug There is water in fuel spark. Too much fuel in engine Something wrong with the fuel Wrong fuel brand system. Smooth fuel flow. Normal cylinder Too much carbon deposit compression. and dirt around Normal fuel electrodes. supply.
● Make sure there is no spilled fuel outside the engine and that the spark plug isn’t dipped with fuel. ● To prevent fire, keep sparks far away from the spark plug mount hole. 2.
Roller bearing for crankshaft main shaft is worn Engine is too hot Too much carbon deposit in Abnormal combustion combustion chamber Improper gasoline brand or low gasoline quality There is water in float chamber Improper spark plug electrodes Engine cannot start clearance because of spark Incorrect ignition time lacking Something wrong with induced coil, and so on IV.
Dirt or something like this fill up Clear away dirt or something like among air cooling fins this Cooling fan is loosen, losing Reinstall well function The rod deformation makes Replace tie rod piston and cylinder bushing side wear Cylinder or piston or piston ring Replace the worn is worn, resulting in air flow between cylinder and crankcase Improper adjustment of engine Readjust engine speed to proper speed produces excessive value by speed regulator rotational speed Crankshaft main bearing is burnt Repla
WIRING DIAGRAM 22
Note: The diagram for other types may be different with the exception of electric-start type.
EXPLODED VIEW AND PARTS LIST(7HP) 24
Ite m 1 Part GBT5789-86 Q ty Description Ite m Part Qty 13 Flange bolt M6×12 45 DJ170F-11100-C 1 Description Crank case assy. 2 DJ168F-11300-B 1 Cover assembly 46 GB276-89-6205 2 Radial ball bearing (6025) 3 DJ168F-11011-A 1 cover assembly 47 DJ168F-15100-A 1 Speed Regulating Gear 4 DJ168F-13204-A 1 Lock Nut 48 DJ168F-15100-A 1 centrifugal assy. 1 Adjusting Nut 49 DJ168F-13100-B 1 Camshaft assy.
31 DJ170F-12302-A 1 Piston Ring B 75 DJ168F-15005-A 1 Lock Bolt 32 DJ170F-12304-A 1 Side Ring 76 GBT6177-N-6 3 Flange nut M6 33 DJ170F-12303-A 1 Wave Ring 77 DJ170F-15007-B 1 Back Spring B 34 DJ170F-12304-A 1 Side Ring 78 DJ168F-15006-A 1 Pulling Rod 35 DJ170F-12300-A 1 Scraper Ring Set, Piston 79 DJ170F-15008-A 1 Fine Regulating Spring C 36 DJ168F-12003-A 2 Clip, piston pin 80 DJ1P65F-14008-A 2 Tube clip 37 DJ170F-12002-A 1 Pin, piston 81 DJ170N-14007-A
EXPLODED VIEW AND PARTS LIST (16HP) 27
Ite Part m Q Description t y Ite m Part Q Description t y 1 GBT5787-B6-8 3 Bolt Flange M6×8 44 DJ188F-13006-A 1 Rotator, valve 2 DJ190N-16122-A 1 recoil starter 45 DJ188F-13300-A 1 Plate, push rod guide 3 GBT5787-B6-12 9 Bolt Flange M6×12 46 DJ188F-13202-A 2 Bolt, pivot 4 DJ190N-16121-A 1 Starter comp, recoil 47 DJ188F-13201-A 2 Arm, valve rocker 5 GBT6177-N-14 1 Flange nut M14 48 DJ168F-13203-A 2 Nut, Arm, valve rocker 6 DJ188F-16001-A 1 Pulley, starter 49
42 DJ188F-13005-A 1 Retainer, EX. Valve spring 85 DJ190N-14300-A 1 fule filler 43 DJ188F-13004-A 1 Retainer, IN. Valve spring 86 DJ1P65F-11038-A 1 Tube Cock 87 DJ190N-1400-A 1 Outlet pipeφ6×φ10×320 88 DJ170N-18400-A 1 Choke Switch 89 GBT5787-B8-20 2 Flange bolt M8×20 90 GBT5787-B8-35 2 Flange bolt M8×35 91 GBT93-LW-8 4 spring washer 92 GBT-W-8 4 flat washer 93 DJ188F-13002-A 1 EX.
