Question about Toro 89885 "lawnboy" Premium 4cycle Oil 20oz

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I have an old lawnboy i need engine diagram

I have an old lawnboy model number d571 service number 111792 the engine isnt turning right and i need a engine diagram so i can take it apart.

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If you cant find one, I would suggest that you use a digital camera and take pictures during the disassembly. Then when you put it back together, just look at your pictures. Good luck...Lee

Posted on May 30, 2010


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Posted on Jan 02, 2017


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Lawnboy model 10415 serial number 5901752 correct spark plug

Joe, Factory Lawn Boy SPARK PLUG 614009, replacement plugs champion CJ14, NGK plug # BMR4A.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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Just need tha engine diagram or carb diagram my choke isnt werkin right thx

How about a YEAR/MAKE/MODEL?

There's only THOUSANDS of different carbs out there!

Jan 09, 2014 | Motorcycles

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I need an engine diagram to help me put my lawnboy 10642 briggs and stratton eng ine back together

Go to and search your model number and you will see an exploded view. Thank you for using fixya.

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1 Answer

My mower is 25 yrs old and the on off switch for the fuel line is unreadable. Should the switch be slid back towards the rear of the machine or toward sthe front?

If this is a lawnboy the switch is pushed to the front to turn it on. If not a lawnboy please specify the brand and model.

You might try removing the fuel line and checking which direction allows fuel to spill into the rag you put under the valve.

if you need parts you can find them at a shop like

Feb 10, 2011 | Craftsman Garden

1 Answer

Needed a part for my mower ...old was on the part itself has BM35 and 701k , model number is E140V-C toro pt # is 92-5938 ....the part ssomeone sent me was 166-0832 it doessnt look the same all...

Apparently the E140V-c is nnot the complete model number.
The two parts you listed are not the same. The 92-5938 is for lawnboy and toro and costs about 200.00 the 1660832 is for an onan and is about 40.00. It is best to work with the engine brand and model number the typoical gap is .010-.012 but depends on engine.

Aug 12, 2010 | Toro Garden

1 Answer

Where is the egine model number located on a Lawn

Go to and input the model number of the MOWER and probably any of the serial #'s if you don't have yours. More options and info will pop up and you may get your engine model info from there. I hear that the Duraforce engines are all the same model?

Jul 10, 2010 | Briggs & Stratton Lawn-Boy Insight Series...

2 Answers

I have a 1987 commercial lawnboy walk behind mower that has stopped running. I gradually lost power over the summer and now it will not start. I have installed a new plug and filter earlier in the spring....

I would try and remove carb and clean it thuroughly. You can soak the parts in solvent or equivelant. The carb would be right after the air filter tube to the intake of engine.

Aug 25, 2009 | Garden

1 Answer

Lawnboy F series Engine - how to remove PLATE AND COLLAR ASM

shaft is tapered plate just slides up on shaft, tap with hammer several times if want break loose,sometimes moisture has rusted it or excess heat has swelled it on tight, i had to take a drimel tool will cutting disk to remove mine,then clean up shaft with file or sandpaper to smooth,little grease an new collar ready for blade.

Apr 12, 2009 | Garden

1 Answer

What is the 2 cycle oil to gas mixture for a 2 cycle lawnboy

20:1 gas to oil is a good place to start. Some mowers thin down to 80:1. If you can tell me the model of the mower I can be more specific, but starting at 20:1 will assure you have adequate protection for the engine. If it's exhausting lots of oil smoke after it has warmed up; you can cut back a little each time until you have minor oil smoke.

at 20:1 you need to add 6.4 ounces of oil to one gallon of gas.

Here's a nifty calculator for various ratios:

Enter 1 gallon of gas, then change the ratio number and then press calculate and the number of ounces per gallon will be displayed.

Mar 29, 2009 | Tecumseh Lawn Boy Push Mowers Insight...

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