RTO Lawn Boy 6.75hp Mower - Answered Questions & Fixed issues

.025" will do

white smoke or grey smoke ?

Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
buy and install a new carburetor repair kit, because the diaphragm will
get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please do not forget to rate me, Thanks
Good Luck, I hope this helps

Check oil level, it could be just excess oil. Also check air filter, it may need cleaning/replacing. Depending on how old the nower is, it could be broken rings in the engine, in that case... time for a new mower. hope this helps!

from what I have seen so far the gap is .30 for all manual start 2 cycle and 4 cycle and .35 for electric start

it may have a crack in the fuel line from tank to carb or the plunger may have a hole in it it all works on gravety feed & no air leaks from gaskets & fuel lines hope i helped if not e-mail me & let me know what other problems it has thanks wade

you can go online to toro who owns lawnboy and order the parts and ship them to your house or go to your local Tec dealer with model num and they should be able to help you

Hey Belfest,

I'd check the fuel line or the bowl. I know it's pain to get down in there.

Remove any of the upper engine cowling that will obstruct your view.

Pour just a little fuel in at a time and look for the leak.

Since its been sitting for that long, I'm betting on a rotten fuel line

Best regards,
Mike

you have one of three things going on, either your battery is is low, in which caes you shouls have it tested to ensure there is not a dead cell. or you have a bad ground, remove the starter and clean all mating surfaces with a wire brush then reinstall if this doesnt help ensure that your battery is completly charged then try using a jumper wire from the battery to the starter if the starter does engage at this point then the solenoid is bad and needs to be replaced.

It's eithe your coil ha heat soak and needs replacing or your fuel circuit isn't venting properly and is creating a negative pressure

Make sure your shut off valve is on positon not part way off,check for a screen plugged up in fuel tank or inline fuel filter, check for bad spark plug engine oil top up maybe saftety sensor when oil is low if you remove the fuel line from carb does gas flow straight out no problem?Joe

First step is to check for spark. Remove the spark plug. You can put the plug wire back on. Then pull cord. Should have a blue spark at the plug. If you do. Try putting a small amount of fuel table spoon in plug hole. install the spark plug and see if it will start. If it dose and will not run for more then a few seconds your not getting fuel. Make sure the fuel is on and clean. If this dose not help you need to make sure the carburetor is getting fuel. Turn off or pinch fuel line. remove from the carburetor . turn back on fuel see if flowing. If this is ok and still wont run. The float in carburetor is stuck. Remove float bowel. Bolt on bottom. Lightly tap with fuel on and see if flowing. If not turn fuel off. Remove float bowel. Under the float is the needle and seat. remove the needle turn on fuel see if flowing. should be. Replace the needle if tip is bad. if not reinstall and install float bowel. prime by first step small amount of fuel in spark plug hole. Should be fine after this.

Ensure the membrane is protected with sand before laying the stone to avoid piercing the membrane.

Link : https://heavy-equipmentmanual.com/

Yes, use instructions for bleeding after a filter change. See attached.

If primer lever stroke action seems short, bump the starter so the pump cam rotates away from the pump.

buy better line. and chain link fences are ******* lines

I'm guessing you have fixed this or given up after 13.5 years, but here is my suggestion for the next person who has this trouble. If you ran it out of fuel and left it over the winter, it could have a drop of fuel that hardened and plugged one of the fuel ports in the carburetor. I have had this happen and needed to remove the fuel bowl and poke the dried film with a pin. Put it back together and it started right up.

Do not know what brand that is, but you can find choke cables at lowes, amazon .com. or any number of small engine repair shops depending on where you live. An after market cable could be easier to find and work just as well.

hi, check the wiring diagram harness

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Question edited for a lot more clarity, add maker, fix typos, change into what I think you were saying. Manuel is the name of a Spanish gentleman, 'manual' is the word you need. Manuals in the link, plus the maker. This link show 'M Series' belt. https://www.manualslib.com/manual/1865101/Lawn-Boy-M-Series.html?page=153

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