Question about Ryobi Garden

Open Question

RM-40P I have overhauled my lawnmower engine, RM-40P Ryobi. The engine starts, but way too much fuel. I have a plastic part and don't know where this goes, timing, fuel and the rest is ok. Checked float, etc. Plse help, cannot find a diagram for this motor.

Posted by Anonymous on


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

  • 48 Answers

SOURCE: Briggs and Stratton 28N700 series 15 hp mower motor

do you have spark at the plug - remove it and ground it while you crank the engine . is this an overhead valve engine ? have you checked compression .

Posted on Oct 24, 2008

  • 42 Answers

SOURCE: Ryobi 18" petrol chainsaw won't start

my guess is that you have a crack or a hole in one of your fuel lines. this is very common in chainsaws and weed eaters because they are used very little and sit for a long time. try checking this and repair if necessary. let me know if this works.

Posted on Mar 08, 2009

  • 490 Answers

SOURCE: 1998/99 kx 125 fuel leaking from carb outlet at bottom

sounds like the needle and seat may be the problem

Posted on Apr 15, 2009

  • 246 Answers

SOURCE: Murray riding mower Mod. #30575x8a will not start.


You can View a Schematic at the Following Site Addy. Select the OEM Briggs and Stratton (Murray Power).
Hope this Helps.

Good Luck



Posted on May 10, 2009

  • 168 Answers

SOURCE: lawnmower wont start

If this unit is very old, it probably does have points. But most are electronic. However, even if it does have points, the points is not the problem here. If the points can fire the primer and run until it dies, then i suspect you have a carb problem. If it lacks either compression, spark or gas you'll certainly will have an issue. I don't think you have a compression or a spark problem. Like i said, if it fires up to burn the priming then again i'd suspect the carburetor. Sounds like the center jet in the center leg of the carburetor internally may have a little dirt or such in it.
Hope this helps.
Good luck

Posted on Aug 23, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

1999 s10 2.2 4cyl.just overhauled engine it started fine and ran fine but now it wont.

This is a timing issue or a valve seat issue. Most likely timing because you overhauled it. Check the mechanical and ignition timing.

Aug 18, 2017 | Cars & Trucks

1 Answer

Need a engine manual on victa RM-40P lawn mower

looks closest to an early sanli /honda clone motor

cant find its user manual

coil failure common
spark plug lead caps crack and arc
metal carb easy to clean and maintain
round air filter
valve clearance
piston to top of compression
valve clearance gap is like 3 -4 thou


Nov 22, 2016 | Garden

1 Answer

Hasn't been ran for 2 months. Just started up for 2 seconds then shut off and won't start back up.

check for spark and or fuel, bad ignition or safety switch etc.
below are links to videos and write ups on small engine, no start problems, press the helpful button
Engine Problems

Don Know Ask Joe 5 Tips on Troubleshooting Lawnmower John Deere X300


Jan 21, 2016 | Garden

1 Answer

Mixer to ritch

most likely one for low speed and one for high speed. Run the mower at high speed and turn the one with the spring 1/8 turn in at a time. Remember where it is now. Turn it in until the engine start to run rough then open it 1/4 of a turn. If that screw is not doing much, put it back where it was to start with and do the same thing with the other one. If neither one does anything, put the throttle to low speed and try it all again. If nothing happens at either speed, you have a definite carburetor problem. In general, if the smoke has a blue tint to it, its usually burning oil. If the smoke is just plain black, its usually a gas problem. I hope this helps. Its kind of tough without being there.

Dec 17, 2013 | Garden

1 Answer

I have a Murray select 22" push lawnmower. It has a 6.o HP Briggs&Stratton Quantum engine. I cannot get it to start or stay running. I have drained the fuel tank of any fuel that was in it and...

You said you drained the fuel tank so I'm assuming that there was fuel left there over the winter when it was not being used. If fuel is left in the lawnmower for a few months without it being used it can form a gel in the jets and/or the diaphram of the carburettor. I would think that this is the problem.

Depending on how bad the problem is you may be able to solve it yourself. Remove the sparkplug and pour around 5ml (one teaspoonful) of fuel into the opening. Dip the end of the sparkplug in fuel, so the spark gap is wet, and replace the plug. Try starting the lawnmower. The fuel you poured in should ignite and the engine turn over. This could **** the fuel through the carburettor and be enough to get it going. You may have to repeat the process 2 or 3 times. Don't be tempted to pour in more than the 5 ml of fuel or you'll flood the engine.

If this fails you'll need to take it to a mechanic to strip down the carburettor. I hope this helps.

May 09, 2011 | Garden

1 Answer

I have a new ryobi ry09050 blower/vacuum and it is almost impossible to start. I Cranked for 30 minutes and no luck, not even a hint orf startion'g I would like a manual for this machine. It is either...

take the carby in for overhaul and new diaphragm kit fitted
the main diaphragm is hard and not sealing on the holes so it is not pumping fuel
40: 1 or 50: 1 is alright and the gap is .020-.025"

why I say that is that stihl use an oil that mixes as 50:1 but it is suitable for the full range of ratios in the stihl range of engines
makes no difference what brand of engine , the ratio is to ensure enough oil to lubricate the bearings and cylinders

Jun 08, 2017 | Ryobi Garden

1 Answer

175000 btu does not fire up

Time for an overhaul kit --plug--- fuel filter 2--air filters -- pump vanes assembly and clean the flame sensor--- at your local lawnmower repair shop!

Dec 21, 2009 | Dayton E48 Oil Filled Utility Heater

1 Answer

The fuel line leaks coming out of the plastic fuel tank on my Ryobi Brush Trimmer (990R I think). I am replacing the old plastic fuel lines into the tank but noticed that they are a little loose too. Any...

There is a little white ring that goes over the line and into the opening on the tank. This is what seals the line so the gas won't leak out. They are about $1.00 at any small engine service shop.

May 15, 2009 | Ryobi 30 Cubic Centimeter Gas Brush Cutter

Not finding what you are looking for?
Garden Logo

Related Topics:

170 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ryobi Garden Experts

Nick Olsen

Level 2 Expert

183 Answers


Level 2 Expert

40 Answers

Roland W VanLue
Roland W VanLue

Level 3 Expert

486 Answers

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

Answer questions

Manuals & User Guides