Yard-Man 604 User Manual (English)

Questions and Answers:

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Bonnie WalshAug 18, 2025
Why won't my Yard-Man 604 Lawn Mower start?
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  meyerkristyAug 18, 2025
  If your Yard-Man Lawn Mower's engine fails to start, try the following: Ensure the PTO lever is in the disengaged (OFF) position and the parking brake is engaged. Check that the wires are connected to the spark plugs and the throttle lever is in the FAST position. If equipped, pull out the CHOKE control or place the throttle control in the CHOKE position. Make sure the tank is filled with clean, fresh gas (less than 30 days old). Clean the fuel line or replace the fuel filter if your mower has one. Clean, adjust the gap, or replace the spark plug. Finally, crank the engine with the throttle in the FAST position.
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Phillip WeberAug 20, 2025
What to do if Yard-Man Lawn Mower engine runs erratic?
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  Tyler AdamsAug 20, 2025
  If your Yard-Man Lawn Mower engine is running erratically, try these steps: Push the CHOKE control in (if equipped) or move the throttle control out of the CHOKE position. Check that the spark plug wires are connected and tightened. Clean the fuel line and fill the tank with clean, fresh gasoline (less than 30 days old). Replace the fuel filter, if equipped. Clear the vent or replace the cap if damaged. You may also need to drain the fuel tank and refill it with clean, fresh gasoline. Additionally, replace the air cleaner cartridge/element or clean the pre-cleaner, if your mower has one.
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Jesse MyersAug 23, 2025
What to do if Yard-Man 604 Lawn Mower engine cranks but will not start?
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  John HowellAug 23, 2025
  If your Yard-Man Lawn Mower's engine cranks but doesn't start, several factors could be at play. First, ensure the throttle or choke is in the correct starting position, as detailed in the OPERATION section of the manual. Also, check if the gasoline tank is empty and fill it if needed. A plugged fuel line or in-line fuel filter can also prevent starting; remove and clean the fuel line, and replace the fuel filter if necessary. Make sure the spark plug lead is properly connected. If there's still no start, test for spark using a spark tester. If no spark is present, have the engine’s magneto serviced by an authorized engine dealer. Lastly, a dirty air cleaner might be the culprit, so refer to the engine manual for cleaning instructions.
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Ryan BurchAug 28, 2025
How to fix excessive vibration on Yard-Man 604?
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  gabrielamccoyAug 28, 2025
  To address excessive vibration in your Yard-Man Lawn Mower, you should: 1. Tighten the blade and spindle. 2. Balance the blade. 3. Replace the blade if necessary.
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Karen CannonAug 31, 2025
Why is my Yard-Man 604 engine overheating?
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  Zachary ShawAug 31, 2025
  If your Yard-Man Lawn Mower engine overheats, ensure the crankcase is filled with the proper capacity and weight of oil. Additionally, clean any grass clippings and debris from around the engine’s cooling fins and blower housing.
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patricia55Sep 2, 2025
What to do if Yard-Man Lawn Mower will not mulch grass?
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  blakeaprilSep 2, 2025
  If your Yard-Man Lawn Mower isn't mulching grass effectively, ensure the throttle control is in the FAST (rabbit) position. Avoid mowing when the grass is wet; wait until it's drier. You might also try mowing once at a higher cutting height, then mowing again at the desired height, or make a narrower cutting swath. Finally, ensure the blade is sharp; sharpen or replace it if needed.
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qcarsonSep 4, 2025
How to fix uneven cut with Yard-Man Lawn Mower?
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  Todd SmithSep 4, 2025
  If your Yard-Man Lawn Mower is producing an uneven cut, you should perform a side-to-side deck adjustment. Also, ensure that the blade is sharp by sharpening or replacing it. Finally, check the tire pressure in all four tires to ensure they are properly inflated.
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Levi PhamSep 7, 2025
What causes poor idling in Yard-Man Lawn Mower?
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  Steven WeberSep 7, 2025
  If your Yard-Man Lawn Mower idles poorly, you can try replacing the spark plug(s) and setting the plug(s) gap. Also, consider replacing the air cleaner cartridge/element or cleaning the pre-cleaner, if your mower is equipped with one.
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David DavidSep 10, 2025
Why Yard-Man Lawn Mower won’t discharge grass or leaves uncut strips?
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  Brooke ShermanSep 10, 2025
  If your Yard-Man Lawn Mower isn’t discharging grass properly or leaves uncut strips, several factors could be responsible. First, make sure the engine speed isn't low by setting the throttle to full. If that's not the problem, consider using a lower ground speed. Also, check if the cutting height is set too low and raise the deck if necessary. For uncut strips specifically, dull blades could be the cause, so sharpen or replace them.
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Mark JacobsSep 12, 2025
Why does Yard-Man 604 engine smoke?
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  Patty ChoiSep 12, 2025
  If your Yard-Man Lawn Mower engine is smoking, it might be due to a few reasons. Check the engine oil level, as overfilling can cause smoking. Also, the engine might be losing crankcase vacuum because the dipstick is not seated or broken, so replace the defective part. Another potential cause is a defective engine breather, which would also need replacement.

Yard-Man 604 Specifications

General

Engine	Briggs & Stratton
Engine Displacement	190 cc
Engine Type	4-Cycle
Deck Material	Steel
Mulching Capability	Yes
Bagging Capability	Yes
Side Discharge Capability	Yes
Cutting Width	22 inches