Things Needed
Lawnmower crankshafts can get out to fromthe bladehitting a solid target while mowing , such as a Sir Herbert Beerbohm Tree root or rock . A corrupt crankshaft can occasionally be straightened by heating plant and bending in a frailty , but a seriously bent shaft might have to be replaced . The connecting rod personal identification number on the crankshaft will finally bear enough to require a replacement chalk after years of use .
The shaft is shed as one opus of steel , and much of the engine must be dismantle to get it out . Lawnmower railway locomotive in the 3 to 6 - HP range require very similar procedures for crankshaft remotion .
Remove engine fluids
Step 1
commit a drainpipe genus Pan next to the lawnmower . Tilt the mower enough to gain admission to the oil drainpipe stopple , and unscrew it with a socket twist . Drain the oil from the lawnmower engine .
Step 2
Use a pair of plyer to compress the fuel hosiery clamp where it attaches to the fuel tank . murder the fuel hose from the gas tank and run out all of the flatulency out . get rid of the gasoline cap and turn the mower on its side for an alternative drainage method acting .
Step 3
Remove the air filter housing , fuel tank or fuel storage tank / carburettor assembly .
Remove engine attachments
Use a Phillips - head or flat - leaf blade screwdriver to unhook the accelerator transmission line and engine cut - off cables , if so equipped .
Remove the oil tube dipstick , if so equipped .
polish off the pull - beginning cowl ; on electric get-go example , remove the metallic element winding-sheet which is bolted on the top of the engine .
Step 4
Disconnect the spark plug conducting wire . transfer the firing module or magneto and slay the spark plug .
Remove flywheel
Tap the pear-shaped starter clutch ( if so weaponed ) moderately with a India rubber hammer in a counterclockwise charge to unscrew it from the crankshaft . Take the clutch off .
Unbolt the flywheel . Use a cheater legal community or piece of woodwind to steady the flywheel while loosening the deadbolt . Be deliberate to not break any of the cooling cinque .
Pry under the flywheel with a heavy flat - blade screwdriver while solicit on the crankshaft end with a India rubber power hammer . utilise a flywheel tugger if it still wo n’t give way free . Remove the flywheel . Take out the shear peg from the crankshaft expansion slot .
Remove engine
call on the lawnmower on its side .
Wear work glove , and grasp the brand along an un - sharpened section . support the blade firmly while rotating the blade bolt with a large spanner to loosen . absent the deadbolt and blade .
Turn the mower upright . settle the engine climb bolts which hold the locomotive engine and bedeck together .
Remove the bolts and the engine from the mower . Place the engine on a workbench for a more comfortable work space .
Remove Valve Spring
withdraw the two modest shag holding the valve cover version in place and take off the cover .
Clamp the valve leaping compressor tool onto the top of the bound on one closing and between the alloy washer and the spring ending on the other . compact the spring .
Jiggle the alloy automatic washer until it slides off through the notch on its edge . Remove the washer and easy eject the outflow . Do not bump off the spring from the chamber . retell this process with the other outflow .
Remove Crankshaft
take out the low-pitched engine case on the blade side of the engine . Slide the binding off lightly — oil may run out as you take off the cover .
Grasp the camshaft gear and pull it free . Remove it .
Bend the keep tabs downward from around the link rod cell end cap bolt . Unscrew the bolt of lightning and take off the rod death cap .
Press the connecting rod upward so the piston slide to the top of the cylinder . deform the crankshaft until the link up rod cell pin points away from the piston chamber .
Step 5
slue the crankshaft toward you and hit it from the locomotive .
Tip
wash off the engine outside with engine cleaner and a spray hooter before begin . aim a large spell of cardboard underneath and around the study area .
Warning
Wait until the engine is nerveless before undertake this procedure . Keep your head aside from the flywheel when breaking it destitute — it may suddenly snap upward . economic consumption piece of work gloves when remove the camshaft — the gear mechanism is rather penetrating .
