compressing drive the piston in a Weed Eater ’s cylinder , turns the crankshaft and push fuel through its circuit . Without compressing , the engine will not run properly and may not bulge out . Low concretion generally come when an air escape give somewhere in the inner engine components , such as the gasket or seal around the crankshaft , piston or carburettor . Symptoms of low contraction include hard starts , erratic laze and low exponent when the engine heats up . crack the contraction on a Weed Eater requires a special tool shout a compression gauge .
Step 1
perturb the black caoutchouc kicking from the tip of the spark ballyhoo , usually on the top or side of most Weed Eaters . Lift the boot off the plug and pinch the socket wrench to the end of the flicker plug . Unscrew the spark sparking plug and take out it from the cylinder .
Step 2
Move the choke coil lever tumbler into the closed setting for regular operation . force the throttle fully into the broad - capable position . Pull the starter rope speedily five to six times to purge any fuel from the cylinder .
Step 3
Insert the stretch oddment of the compression gauge into the cylinder hole where the spark plug sat . pull in the starter rope until the compression gauge needle maxes out , or block moving . Standard , new two - Hz locomotive compression readings will be 90 psi when hot and 100 pounds per square inch when cold . Lower readings signal engine trouble .
Check Small Engine Compression
pocket-sized engine involve a sealed amount of compression to labor the piston and twist the crankcase . If air travel is leaking somewhere in the engine , you will notice a drop in condensation . Symptoms of a contraction problem can let in hard start , quicksilver idling , loss of power under payload and hard starting when the railway locomotive is hot . The only efficient and accurate way to test for contraction is with a condensation gauge , which resembles a tire gauge . Unscrew and remove the cylinder cover charge with the screwdriver , if it ’s present on your small engine , to benefit access to the spark plug . Place the socket wrench over the flicker jade . Crank on the starter electric cord three to four times to purge any fuel continue in the piston chamber or crankcase .
Things Needed
Tip
Before rebuilding the railway locomotive , transfer and imperativeness test the carburetor as the source of your air news leak .
