Question about Toro Wheel Horse Drive Belt For Tiller Pt114765

Open Question

Onan Model E125V Engine Backfire problem

I have tried everything listed in troble shootin manual Plus ground Valve and readjusted to spec. Carb, Cleaned and gapped coil, spark plug, Has strong ignition. Apparentley no adjustment for timming.Contacted Cummins about it with no sucess. Need Help'

Posted by on

  • Eugene Rounds Dec 09, 2014

    Is it back firing thru the carburetor(Intake) or the Exhaust? Have you checked for a partially sheared flywheel key? Out the exhaust it be burning either too lean or too rich on fuel.



6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 473 Answers

SOURCE: starts runs min. or two then stops....

Go to then click customer care, then click manuals and parts. Type in model no. and download the owners manual. This should get you the spark and flywheel gap. Probably still something in the carb. Some orifices are very hard to find and to clean but they must be clean. Also check for dirt dopper nest in the muffler.

Posted on Apr 06, 2009

  • 1545 Answers

SOURCE: i Have a 1978 Honda

Your plug is telling you the answer here. Look at this chart.
i have seen engine produce the dry, black soot deposit on plugs when the timing is just a little off. Run some Seafoam thru your fuel system and it will clean the carb, the carbon, the valves...everything.

Posted on Oct 23, 2010

#1 Taper
  • 1040 Answers

SOURCE: Engine runs great for 10 minutes and then stalls.

Believe it or not, your gas cap is clogged up with dirt and debris. When a carburetor is unable to get a constant flow of air from outside, pressure builds up on the fuel tank. The fastest way to determine whether or not this is the problem is as follows.

As you are using your Mower, at that point when it begins to stall out, loosen the gas cap so that you release the pressure that is built up in the gas tank. If the engine begins to regain power, then you know it is a clogged gas cap. (Simply get a small wire and clear the breathe holes in the cap.) If the engine dies even after loosening the gas cap, then you may want to check to make sure the air breather is clean. ( A dirty air breather can cause the engine to over heat and stall out.)

If none of this seems to help, then it is probably a bad Ignition Coil.

Good Luck!


Posted on Jul 29, 2011

  • 2239 Answers

SOURCE: have two string trimmers, both hard to start. shindawa homelite 62061 & toro TB21EC. H/L does great job when it starts. Toro won't come up to speed. Have cleaned carbs in both and checked plug

When you say it will not rev up to full speed, that sounds to me like a blockage either in the spak arrester in the muffler outlet, or the exhaust port is blocked, or the muffler itself is blocked.

Posted on May 12, 2012

  • 201 Answers

SOURCE: Toro walk behind lawn mower. Model 20074. New spark plug, gapped to.030", verified that there is a spark, cleaned carburator and jets. won't start even with starting fluid. Any suggestions?

advise doing a compression test with gauge.

could be valve not seating or low compression

Posted on May 27, 2014

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Searching for onan Model 45BGDFB30502 manual

You will be looking for a 4.5 KW BGD manual. Here is a link for the service manuals. One is from Spec A to G and the other starts at spec H.

Feb 08, 2016 | Electrical Supplies

1 Answer

My onan 4.0 grenerator motor will not idle and it is back fireing while trying to run is in the valves

If it is backfiring even during idle, there are a couple of possible issues. Check the obvious and least expensive first. Make sure you have correct OEM spark plugs, check ignition wires. Then check the ignition coil and trigger module, there is a procedure for doing that in the Cummins Onan manual. A manual can be obtained from or local Onan RV dealer. This will give you the ignition coil resistance and the ignition module resistance. Also has anyone messed around with the carb, or has it sat for long periods, too lean a fuel mixture can cause backfiring. Good Luck ;)

Feb 11, 2015 | Onan CUMMINS 4.0 KYFA/6747 - Cummins...

2 Answers

Shut down engine

Most engines hav an anti backfire valve solenoid screwed under the carb bowl. This sometimes sticks due to ethanol gas. When you turn off the ignition, it closes the valve to let the engin run out of fuel. If it sticks closed the engine will not start. Sticken open, the engine will not shut down. It has a single wire going to it. When you turn on the key, you should get power to the solenoid. If you have power to it, then remove the solenoid and clean the needle valve and carb opening. Would be a good time to clean carb also. A good carb cleaner works well. Ethenaol added gas is a real culprit to carbs nowadays.

Dec 14, 2014 | Garden

1 Answer

Solve Backfire problem on Onan Model E125V engine

clean the plug, or plugs n and shut off choke soon after it starts

Dec 09, 2014 | Electrical Supplies

1 Answer

Flames come out muffler

Sounds like Intake valve gap is bad and there is gas in the oil ? Valves cleaned, lapped and head gasket redo . Not too spendy. About 25 dollars total for everything. The lapping tool & Compound, head gasket, OHV rocker cover gasket if equipped. Maybe an 'inch pound' torque wrench if you don't have one, misc socket set, rags, carb cleaner, starting fluid for the tougher build up and some new steel wool pads. Also the valve clearance specs on rocker arms and a few how to vids on youtube about adjusting your valves with feeler gauge and proper torque specs are listed in your engine's model number Manual online somewhere.

Jul 11, 2014 | Cub Cadet Garden

8 Answers

John Deere Model 445 garden tractor. Replaced plastic cam shaft gear, tried to start motor and it backfires through carb. I just removed front cover of engine to check the timing marks on both the camshaft...


Please check for the anti back fire solenoid in the front of the carb. Check whether the wiring to it is fine and if it is getting +12 V. If yes then you maybe required to replace the solenod.
However, if this doesn't resolve the issue then you would need to adjust manually so that decompresser works normally. Inspect the flywheel key as well, it may have sheared.

Check the carb filter and the make sure there is no sign of water in/around the carbeurater. Hope this helps... If it does please do not forget to accept the solution or post back for assistance.


Aug 04, 2010 | John Deere 420,1020,2010,2020,2510,2520...

1 Answer

Need onan marquis 5000 model 5bgmfa26105f wiring

Give me to full model and spec # and I will email you a service manual.

Nov 04, 2009 | Watts Onan Portable Generator - 5000 ,...

3 Answers

Onan MicroQuiet 4000 Generator

Remove the air cleaner and inside near the throat of the carb is two bolts holding the carb to the intake remove these. Unhook the fuel line and twist the carb to allow the linkages to remove.

Sep 14, 2009 | Watts Onan Portable Generator - 4000 ,...

3 Answers


Yes, it could (and probably is) be an air leak. Check to be sure the carb is tight in the intake manifold, and make sure the hot-start isn't loose and is sealing properly. Also make sure all of the exhaust system joints are tight, an air leak in the exhaust will make a four-stroke pop and backfire like an old work truck with no muffler...

Nov 10, 2008 | 2005 Honda Unicorn

Not finding what you are looking for?
Toro Wheel Horse Drive Belt For  Tiller Pt114765 Logo

Related Topics:

45 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toro Garden Experts

Joseph Mueller
Joseph Mueller

Level 2 Expert

338 Answers

Mike Squire

Level 2 Expert

402 Answers

Roland W VanLue
Roland W VanLue

Level 3 Expert

486 Answers

Are you a Toro Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides