Mountfield R28M Ride-on-Mower Mistake? Any tips..?

ThisIsWeird

There's little point in testing the new plug in another machine; the plug is almost certainly ok - it's your mower you are trying to check for providing a spark.

I can't tell by the photo, but has the new plug been 'oiled' by it's use? Is it 'glistening'?

Lord help me - I'll ask for the nth time: do you HAVE a blow torch? Do you HAVE a gas hob?

sujsuj

ThisIsWeird said:

There's little point in testing the new plug in another machine; the plug is almost certainly ok - it's your mower you are trying to check for providing a spark.

I can't tell by the photo, but has the new plug been 'oiled' by it's use? Is it 'glistening'?

Lord help me - I'll ask for the nth time: do you HAVE a blow torch? Do you HAVE a gas hob?

Ok

ew plug been 'oiled' by it's use? Is it 'glistening'? >> I will remove & check it tomorrow
I don't have a blow torch or gas hob.. 

sujsuj

But I think gas hob or blow torch is irrelavant now as I got new spark plug..?

ThisIsWeird

If the new plug has also 'oiled' - and there's a good chance it has - then you need to clean it too. Tho' since it'll just be clean oil on this plug, it should be doable using petrol.

Or, good suggestion earlier, get an aerosol of 'engine start'. Use it to clean the plug (it evaporates very quickly, so spray-and-brush it in quickly too), and also to help get your engine going after the plug's been replaced.

Make sure the whole plug's innards are clean, but particularly the electrode tip where the spark jumps.

With Engine Start, your engine should fire regardless of whether fuel is getting in or the choke setting, provided there's the faintest of sparks taking place. Often that few seconds of running on the ES is enough to clear whatever ails your engine. Use it as instructed on the can.

benson1980

sujsuj said:

benson1980 said:

My next steps would be:
- test of spark plug good shout
- did you check the air filter for and oil/fuel residue? 
- I would check and clean the carb (can of carb cleaner required). Accepting you need to be careful with it, it isn't that difficult.
- with the blade and mentioning you tried to loosen it, is it fully secure on the crankshaft? This is essentially part of the flywheel so a loose blade can cause problems starting, as I recently discovered with our mower.

Is there a correct way to tilt this machine? The instructions will surely tell you. It's always air filter up on a push mower.

I'd be inclined to say you've got this far so may as well crack on and try and fix it yourself, or at least try the basic steps that have been suggested before calling a repair shop. 

1. Testing spark plug, I saw other video. doing similar thing with ride-on is difficult. As if I didn't close the body cover and sit on the riding  seat, engine will not start. So is there any easy option..? I have another Mountfield 3-in-1 Petrol Multi-tool. Putting  this spark plug in that machine is an option..?

2. Air Filter - Ate you talking about this item which I cleaned earlier?

3. Blade is not engaged yet. For that engine need to properly start

It’s not clear from your earlier post if you checked/cleaned the actual filter element.

disregard potential blade issue. S62 clarified that.

I would definitely be checking the carburettor if you were cleaning oily deposits around where the air filter housing is.

ThisIsWeird

benson1980 said:

sujsuj said:

benson1980 said:

My next steps would be:
- test of spark plug good shout
- did you check the air filter for and oil/fuel residue? 
- I would check and clean the carb (can of carb cleaner required). Accepting you need to be careful with it, it isn't that difficult.
- with the blade and mentioning you tried to loosen it, is it fully secure on the crankshaft? This is essentially part of the flywheel so a loose blade can cause problems starting, as I recently discovered with our mower.

Is there a correct way to tilt this machine? The instructions will surely tell you. It's always air filter up on a push mower.

I'd be inclined to say you've got this far so may as well crack on and try and fix it yourself, or at least try the basic steps that have been suggested before calling a repair shop. 

1. Testing spark plug, I saw other video. doing similar thing with ride-on is difficult. As if I didn't close the body cover and sit on the riding  seat, engine will not start. So is there any easy option..? I have another Mountfield 3-in-1 Petrol Multi-tool. Putting  this spark plug in that machine is an option..?

2. Air Filter - Ate you talking about this item which I cleaned earlier?

3. Blade is not engaged yet. For that engine need to properly start

It’s not clear from your earlier post if you checked/cleaned the actual filter element.

disregard potential blade issue. S62 clarified that.

I would definitely be checking the carburettor if you were cleaning oily deposits around where the air filter housing is.

SS did remove it, and whilst it looked a bit oily, it didn't look excessive to me. The engine will certainly be successfully drawing in air via it.

Whether the carb has oil in it is a different matter right enough, but I have to say it's not something I've seen happen myself. And I wouldn't be recommending that SS goes 'there' anyway :-).

I'm still hopeful that it's a simple case of an oiled plug, and the earlier suggestion of Engine Start - after cleaning the plug - has a good chance of success. SS just needs to get that few seconds of firing going...

Section62

sujsuj said:

But I think gas hob or blow torch is irrelavant now as I got new spark plug..?

Please read my last post again.

If you can, try to get the old spark plug to work first - trying the new plug first will probably (very likely already has) ruin it and waste you the cost of a new spark plug.

Once you've -

1) Confirmed there is a good spark

2) Got the engine to fire

3) Burnt off the excess oil in the cylinder from running the engine until the smoke stops...

...Then it would be time to start using the new spark plug, but probably unnecessary if the engine is running Ok.

stuhse

1. I have more than half tank Petrol
2. Is the choke, throttle set correctly ??? How to check this..`? Any picture needed..? I haven't made any change
3. If I don't sit properly, it will not even crank, so i am sitting properly.
4. Try without the choke and on a low throttle - How to do this..?

Thanks very much.

May the good lord give us all strength 🙏

Does your mower have a lever, probably on the dash board , that when you move it makes the engine rev faster or slower?

ThisIsWeird

Section62 said:

If you can, try to get the old spark plug to work first - trying the new plug first will probably (very likely already has) ruin it and waste you the cost of a new spark plug.

Since SS doesn't have an alternative way to properly clean up the old plug (other than a solvent, which I think would have limited results on that beauty), I can't see him successfully firing up the engine with it. So I personally think sticking with the solvent-cleaned new plug is his best bet. Engine Start will very likely get the thing going before the cleaned plug has a chance to be oiled again.

And, after the mower starts, and the smoke has cleared (I really hope he videos this...), a few minutes of burning-off the remaining engine oil won't, I don't believe, wreck the new plug in any way. It'll likely only end up having a light dusting of carbon on it, something it would gain after a couple of lawn-mowings in any case.

ThisIsWeird

stuhse said:

1. I have more than half tank Petrol
2. Is the choke, throttle set correctly ??? How to check this..`? Any picture needed..? I haven't made any change
3. If I don't sit properly, it will not even crank, so i am sitting properly.
4. Try without the choke and on a low throttle - How to do this..?

Thanks very much.

May the good lord give us all strength 🙏

Does your mower have a lever, probably on the dash board , that when you move it makes the engine rev faster or slower?

I really hope that SS has a literal grasp of his mower's main controls by now, or we are in a much bigger hole than just an oiled engine :-)