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John Deere E170 Troubleshooting

The John Deere E170 lawn tractor was manufactured between 2018 and 2020. The John Deere E170 driveline includes a 44.2 cu.in (724 cc) Briggs and Stratton 44S977 4-cycle vertical-shaft V-twin cylinder OHV air-cooled gasoline engine and Kanzaki Tuff Torq belt-driven hydrostatic transmission with foot-controlled variable speed drive.

The engine has a cylinder bore of 3.12" (79 mm), piston stroke of 2.89" (73 mm), and rated power of 25 hp (18.5 kW). The maximum forward speed - 5.5 mph (8.8 kph), maximum reverse speed - 3.2 mph (5.1 kph).

The John Deere E170 is equipped with a manual steering system, wet disc brakes, 15x6.50-8 front tires, and 22x9.50-12 rear tires. The wheelbase is 49" (1240 mm). Compatible attachments for the tractor: a 48" mid-mount 3-blade mower deck with cutting height of 1.0-4.0" (25-102 mm), 13 cut positions, and manual lift system, 46" front blade, and 44" front-mount 2-stage snow blower.

Engine Troubleshooting
Engine starts hard or doesn't start
Empty fuel tank - Fill fuel up
Low-quality gasoline - Change fuel
Air in the fuel lines - Bleed the fuel lines
Defective wiring connection of spark plug - Check the spark plug wire connection, repair or replace
Damaged spark plug - Replace spark plug
Dirty fuel filter - Fuel filter needs to be replaced
Safety contact for brake pedal defective - Install new part
Carburetor is clogged - Clean the carburetor
Engine has low compression - Check cylinder block and replace defective parts
Incorrectly adjusted or damaged throttle cable - Adjust properly or replace the cable
Engine runs irregularly
Air intake grill is clogged - Need to clean or wash
Ignition system malfunction - Inspect ignition system and change faulty parts
Defective or stuck choke cable - Replace or service the cable
Air filter element is clogged - Clean or replace air filter
Fuel pump is damaged or dirty - Test fuel pump and change if necessary
Engine starts and stops immediately
Defective spark plug - Install new spark plug
Carburetor is faulty or dirty - Service or change carburetor
Damaged ignition coil - Replace ignition coil as necessary
Worn or loose valve springs - Replace valve springs
Stuck valves - Clean the valves
Engine overheats
Engine oil level low - Fill the crankcase with engine oil
Engine overload - Reduce the load
Air intake screen is blocked - Need to clean or wash
Too lean carburetor mixture - Adjust carburetor correctly
Incorrect ignition timing - Set the ignition timing correctly
Wrong valve setting - Set the valves properly
Engine noises or knocks
Stale gasoline - Change fuel
Excessive engine load - Reduce load
Engine oil insufficient - Add oil to the engine crankcase
Low idle speed adjustment is incorrect - Adjust idling as required
Dirty or defective fuel pump - Test fuel pump and change if necessary
Main bearings or crankshaft failure - Have bearings or crankshaft replaced
Valve clearance is incorrect - Adjustment procedure required
Piston rings or cylinder bore are damaged - Replace faulty parts
Engine power loss
Clogged or improperly adjusted carburetor - Carburetor needs to be adjusted correctly or cleaned
Plugged air filter - Replace or service air filter
Dirty or faulty fuel pump - Check fuel pump and change if required
Ignition system failure - Test ignition and replace failed parts
Blown cylinder head gasket - Replace the gasket as required
Valves are burned or stuck - Replace or clean valves
Worn or damaged push rod - Push rod should be replaced
Damaged cylinder block parts - Defective components need to be replaced
Excessive fuel consumption
Choke opening is not full - Replace or adjust choke cable
Carburetor main jet is incorrectly adjusted - Adjust main jet as required
Defective or loose spark plug - Re-tighten or change the spark plug
Stuck, burned, or worn valves - Clean or replace valves
Worn sleeve, rings, or piston - Change faulty parts
Valve clearance is improper - Check and adjust
Engine using too much oil
Gaskets or seals can be faulty - Change worn parts according to specifications
Valve guides or stems are damaged - Need to replace the valves
Seized or wear piston rings - Change piston rings
Piston or cylinder liner is damaged - Check liner and piston, install new components as required
Blocked breather pipe or hose - Clean or replace

Hydrostatic Transmission Troubleshooting
HST transmission is excessively noisy
Speed control linkage is worn or unadjusted - Adjust or replace linkage
Transmission is under excessive load - Reduce transmission load
Insufficient oil level or contaminated oil - Add oil to the correct level or fill the transmission with fresh oil
Worn or defective transmission components - Check transmission parts for damage or wear and replace if required
Difficult to shift
Stuck or damaged gshift linkage - Replace or repair the linkage
Seized or worn hydrostatic pump - Repair or replace pump
Worn or misadjusted transmission shift control parts - Change or adjust correctly
Power is insufficient
Insufficient transmission oil - Check transmission oil level and add oil as required
Worn or faulty drive pulley - Install a new pulley
Shifter linkage is not adjusted or faulty - Change or adjust linkage
Speed control pedal linkage is damaged or out of adjustment - Replace or adjust linkage
Transmission leakage
Transmission seals or gaskets are broken - Change seals or gaskets
Final drive shaft is leaking - Change shaft seals
Cracked transmission housing - Replace damage housing or transmission assembly

Mower Deck Troubleshooting
Mower vibrates too much
Worn or dirty mower drive pulley - Service or change pulley
Worn or loose drive belt - Belt needs to be adjusted or replaced
Unbalanced or warped cutting blades - Replace or balance blades
Loose blade bolts tightening - Tighten bolts as required
Discharge chute regular clogging
High mowing speed - Select a slower speed
Long grass - Use a lower cutting height
Engine rpm is too low - Throttle is not fully open
Cutting level is too low - Adjust mower to higher cutting height
Mower deck drive belt installed incorrectly - Drive belt must be installed correctly
Lawn mower leaving uncut grass
Deck clogged with grass clippings - Clean out the mower deck
Blades are too dull - Blades need to be sharpened
Worn or defective blades - Blades need to be replaced
High mowing speed - Use a lower speed
Cutting level is too low - Use correct cutting height
Full bagger - Remove grass from bagger
Blades are scalping the grass
Bumpy or unleveled lawn - Level the lawn
Mower deck cutting height is set too low - Use correct cutting height
High ground speed - Select a lower speed
Improperly leveled mower deck - Adjust mower deck level properly
Bent or worn blades - Blades must be changed
Low tire pressure - Correct tire pressure
Mower cuts uneven
Low tire pressure - Need to inflate tires
Mower deck is not leveled properly - Adjust mower deck level properly
Blades are too dull - Need a blade sharpening
Worn or defective blades - Install new blades
Cutting deck is clogged - Clean mower deck as required
Deck shell is broken - Rebuild or replace mower deck
Mower spindle is faulty or loose - Repair or change the spindle

Electrical Troubleshooting
Battery will not charge
Electrical wire connections are corroded or loose Tighten or clean electrical wiring connections
Electrical terminal connectors are defective - Install new terminal connectors
Dead cell in battery - Change the battery
Starter turning slow
Low battery power - Charge the battery
Battery does not hold charge - Battery needs service or replacement
Faulty battery terminals or disconnected cables - Connect cables properly or replace terminals
Starter motor won't turn
Battery is discharged or defective - Replace or charge as required
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly
Battery capacity is low - Charge the battery
Improperly gapped or dirty spark plug - Clean, gap or change spark plug
Starter motor or solenoid is defective - Repair starter or replace solenoid




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