253fmm service manual manual#

Loosen carburetor drain screw, check inner side for gasoline no gasoline supplied for carburetor remove spark plug,insert it into plug cap, check the spark by touching engine grid spark weak or no spark test cylinder compression pressure too low or no pressure follow the starter keypoints to re-start engine knocks, but no starting remove and check the spark plug again spark plug wet no gasoline in the tank fuel tube between gasoline tank and carburetor clogged.ДЇloat chamber fuel tube clogged gasoline cover air hole clogged fuel filter clogged fuel filter screen clogged gasoline auto fuel cup faulty spark plug faulty fouled spark plugД¬DI unit fualty pulse coil faulty high voltage coil cable open or short high voltage coil open or short main switch faultyД«attery faulty valve too tight, no gap valve seat faulty cylinder, piston, piston ring faulty cylinder gasket leak valve burnt out valve timing faulty crankcase leak when wmpressДЇuel tube clogged muffler clogged auto air cut poor action inlet duct has air in ignition timing incorrect carburetor fuel adjusting screw set faulty air cleaner clogged carburetor fuel level too high auto air cut poor action throttle excessivelyД«. HARD START OR CANNOT START symptom inspection adjustment cause enough gasoline supplied for carbuertor spark plug jump normal compression engine dose not fire spark plug dry start engine with choke closed Torque specifications listed below for respective locations.ДЄ. WARNING: Things that could cause damage to the person or partner.Дouble cylinders 15~ inclinde from vertical Not run the engine unless the shop or working areaД¬AUTION: Things that could cause damage to the engine parts. Exchange signals as frequently as possi-Д«le when a work involves two or more workers. (8)Work safely and give your work your undividedДЄttention. (4)Use special tool when use of such a tool is (7)Upon assembling, check every possible part for proper installation and movement or operation. When parts are to be reused, they must be inspected carefully to make sure they are not damaged or deteriorated and in good usable condition. (3)Use genuine SANYANG parts and lubricants or those equivalent. (6)Coat or fill parts with specified grease where specified. (2)When tightening bolts or nuts, begin on center or larger diameter bolts and tighten them in criss- cross pattern in two or more steps if necessary. (5)Clean all removed parts in or with solvent, and lubricate their sliding surfaces upon disassembly.

(1)Use new packings, gaskets,O-rings and cotter pins space and clipes whenever reassembling. HEADLIGHT/STEERING/FRONT WHEEL/FRONT FORK. 4Д¬YLINDER HEAD/VALVE.5Д¬YLINDER/PISTON.6Д¬LUTCH/OIL PUMP/GEAR SHIFT. LUBRICATION SYSTEM.3Д®NGINE REMOVAL/INSTALLATION. SANYANG reserves the right to make changes at any time without notice and without incurring any obligation whatever. All information, illustrations, directions and specifications included in this publication are base on SANYANG NCA250.

253fmm service manual manual#

PREFACE PREFACE This shop manual describes the technical feature and servicing procedures for the SANYANG NCA250.