445577-0120-E1 John Deere Z425 Z 425 4455770120e1 lawn mower

    GENERAL DISCLAIMER - PLEASE READ! The following engines on this page have some similar specifications as your JOHN DEERE Z 425's engine.

Although any of these engines may not be exactly (100%) the same as for your JOHN DEERE Z 425's engine , we feel very confident and are doing our best from our many years of experience to show you the closest engines we have in stock that have some similar specifications as your original engine, such as crankshaft diameter and length and mounting bolt pattern that may work for your equipment. Your exact original engine may not be available because it may: be too old to be in production or discontinued due to some EPA regulations.

Our customers may had bought any of these engines from us and may had done some modifications to adapt to work with their equipment including, but not limited to: transferring the wire harnesses from their old engines to the new engines, tappering the mounting holes, drilling new mounting holes on mower's decks, cutting and welding mufflers, ...etc.

Although we spent a lot of time to prepare, review and compose this page, the information here may not be 100% accurate as we collected them from our experience and from our customers on the daily basis. You should replace your old engine with the same brand, type, and series, specifications to avoid major modifications. Please contact us first if you have any questions or want to confirm before purchasing. We are here to help!
OUR POSSIBLE REPLACEMENT ENGINES FOR

JOHN DEERE Z425 with: BRIGGS & STRATTON
445577-0120-E1
(445577-0120 or 4455770120 or 4455770120E1)


Our engines on this page have the following similarities. Choose the engine HP and the displacement (cc) accordingly to fit your needs:
    1. Bolt pattern - The mounting hole pattern are the same.
    2. The dimmension.
    3. Muffler configuration is the same (you can reuse your old muffler)
    4. Although spent a lot of time to carefully study about your engine, prepare, review, and compose this page to believe that your engine crankshaft size is 1" diameter x 3 5/32" length, it is still your responsibility to measure your engine crankshaft to double check if it is the same.

Other minor things that you may have to do when you buy the long block to replace your engine including but not limited to: transfer your wire harness from your old engine to the new one if it is not the same (most of these have similar wire harness though), tap/thread the mounting holes (as most of brand new engines did not have the mounting holes threaded/tapped by the manufacturer) etc..

YOUR EQUIPMENT BRAND & MODEL#
YOUR ENGINE BRAND, MODEL, SPEC/TYPE #
OUR POSSIBLE REPLACEMENT ENGINES
(If you matched your mower information on the left, buy one of the following engines )
JOHN DEERE

Z 425
Make sure your mower has ALL of the following information or CALL us!
BRIGGS & AND STRATTON 23 HP 724cc ENGINE

445577-0120-E1
(445577-0120 or 4455770120 or 4455770120E1)


Your engine choke may be (double check): SEPARATE MANUAL CHOKE (Mower needs 2 control cables, 1 for choke and 1 for throttle)

If after checking your engine/mower choke and the above is correct, your 1st option is to buy a SEPARATE MANUAL CHOKE engine or 2nd option READY START engine.

If the 1st or 2nd engine option is not available here, you can buy a CHOKE/THROTTLE COMBINED engine here and you may be able to connect your mower's throttle cable to the engine's control to do both choke and throttle. After connecting your mower throttle control cable to the engine's CHOKE/THROTTLE COMBINED control, the engine will be choked if you push the mower throttle control lever all the way up before starting the engine. After the engine started you will pull the throttle control lever down a little bit to get to full throttle or at the any level for your desired engine speed.

 BRIGGS AND STRATTON TWIN Cylinder Intek OHV.

As always, if in doubt or the information here is not correct, please contact us FIRST. Your current engine on your mower may looks similar to one of the Reference Pictures below.


NOTICE: Look for option 1 or 2. If not, try option 3. Here are the options:
  1. If you buy a SEPARATE MANUAL CHOKE engine, you will need to install a mower choke cable control on your mower if it does not have one.

  2. If you buy a READY START (auto choke) engine here (if available) you won't have to worry about choking the engine manually.

  3. If you buy a CHOKE/THROTTLE COMBINED engine, you may be able to connect your mower's throttle cable to the engine's control to do both choke and throttle. After connecting your mower throttle control cable to the engine's CHOKE/THROTTLE COMBINED control, the engine will be choked if you push the mower throttle control lever all the way up before starting the engine. After the engine started you will pull the throttle control lever down a little bit to get to full throttle or at the any level for your desired engine speed.
If you believe more or less Horse Power (HP) CC or Gross Torque than your current engine will be fine with your mower, you can buy any of the engine in this box. Please choose HP, CC, and Gross Torque and engine choke style accordingly.
Reference PicturesAvailable engines
reference picture
click to buy
READY START (Auto choke. Mower needs just 1 throttle cable. Choke cable is not needed. This engine can replace other different choke engine.)

22 (Gross) HP, 724 cc 44N677-0055-G1

CLICK TO BUY $1295.95    FREE SHIPPING.
reference picture
click to buy
READY START (Auto choke. Mower needs just 1 throttle cable. Choke cable is not needed. This engine can replace other different choke engine.)

PROFESSIONAL SERIES 16 Amp alternator

22 (Gross) HP, 724 cc 44U677-0005-B1

CLICK TO BUY $1295.95    FREE SHIPPING.
reference picture
click to buy
READY START (Auto choke. Mower needs just 1 throttle cable. Choke cable is not needed. This engine can replace other different choke engine.)

PROFESSIONAL SERIES 

23 (Gross) HP, 724 cc 44U777-0009-G1

CLICK TO BUY $1345.95    FREE SHIPPING.
reference picture
click to buy
READY START (Auto choke. Mower needs just 1 throttle cable. Choke cable is not needed. This engine can replace other different choke engine.)

PROFESSIONAL SERIES 

24 (Gross) HP, 724 cc 44U877-0024-G1

CLICK TO BUY $1389.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

20 (Gross) HP, 656 cc 40N8770022G1656CC

CLICK TO BUY $974.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

20 (Gross) HP, 656 cc 40N877-0087-G1

CLICK TO BUY $1065.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

PLATINUM SERIES 

22 (Gross) HP, 724 cc 44N677-0037-G1

CLICK TO BUY $1195.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

22 (Gross) HP, 724 cc 44N677-0045-G1

CLICK TO BUY $1195.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

24 (Gross) HP, 724 cc 44N877-0007-G1

CLICK TO BUY $1265.0    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

PROFESSIONAL SERIES 16 Amp alternator

25 (Gross) HP, 724 cc 44S977-0035-G1

CLICK TO BUY $1474.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

PROFESSIONAL SERIES 

25 (Gross) HP, 724 cc 44S977-0005-G1

CLICK TO BUY $1474.95    FREE SHIPPING.
reference picture
click to buy
CHOKE/THROTTLE COMBINED (Mower needs just 1 control cable to do both choke & throttle)

PROFESSIONAL SERIES 16 Amp alternator

27 (Gross) HP, 810 cc 49S877-0019-G1

CLICK TO BUY $1695.95    FREE SHIPPING.