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

sujsuj

ThisIsWeird said:

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 :-)

I am learning engine basics, but enough with this mower operations. I recently changed mower drive belt following you tube videos. So I hope I am moderate ok diy,rwho can follow instructions..

Section62

ThisIsWeird said:

'Microcracks' ma botty. Yes, we'll have to disagree!

Try google, rather than this "botty" thing.

ThisIsWeird said:

For the cost of a plug, I ain't going to entertain such extreme 'possible' scenarios.

I might agree if the OP had a shelf full of spare spark plugs. But he's got one.  Therefore it makes sense to not risk wrecking it without at least checking that the old one is faulty /the cause of the non-starting.

A second wrecked plug would mean waiting to get another one.

ThisIsWeird said:

Coupled with the fact that SS has no suitable method of getting that old oiled and carbonised plug suitably clean.

The obvious step then is to get what's needed to clean the old plug, surely?  As a keen DIYer the OP should really consider having a blowtorch in their toolkit, and getting one shouldn't take longer than getting yet another new spark plug.

As it happens, the old plug is apparently working just fine without needing extra cleaning.  Had the old plug been tested properly before taking the new one out of the box, the OP would now be in posession of a brand new shiny spark plug which could be returned for a refund, or kept for future use.

This is a money saving website, many of us would think saving the cost of a new spark plug worthwhile, especially if it can be achieved by nothing more than applying a little knowledge, logic and common sense to a problem.  Isn't that why we are all here?

sujsuj

Got sponge filer washer in soapy water. Wire mesh cover also seems dirty. How to clean it? Is this could stop engine working?

Section62

sujsuj said:

I can see old spark plug gave good spark.
1. I removed spark plug from engine
2. connected to the wire
3. Make its touching engine body for earthing
4. Tried to start engine.
5. Noticed Good spark

Is this means even old spark plug is completely OK..? See video.
Any new suggestions based on this..? Should i continue to use old spark plug..?

Yes to the BiB, at least for the time being.

Can you confirm the spark in the video is at the tip of the spark plug, not between the threaded part of the spark plug and the metal of the engine.  It isn't completely clear from the video where the spark is.

What this test does tell you is there isn't a fault in the HT system, and the various safety interlocks (on the electrical side) aren't preventing the engine starting.

Fuel starvation now moves up the list.

If there is nothing on the fuel system you've turned off, then I think the most probable issue is oil getting into the carburettor.  So that needs inspection and cleaning, but isn't a novice DIYer job.  They are too delicate and finely adjusted to run the risk of damaging them by inexpert maintenance.  Others might disagree and give you advice on cleaning the carburettor, but think very carefully before taking that advice.

Section62

sujsuj said:

Got sponge filer washer in soapy water. Wire mesh cover also seems dirty. How to clean it? Is this could stop engine working?

No, it won't stop the engine starting.

The amount of debris isn't enough to worry about for now.  And the effect it would have (if any) is the equivalent of having the 'choke' set to on.  I.e. it reduces the airflow into the combustion chamber.

This in theory would help a cold engine start, and would only be an issue once the engine is running and starting to warm up.

The stage you are at is the engine isn't firing.... so fix that first.

sujsuj

Section62 said:

sujsuj said:

I can see old spark plug gave good spark.
1. I removed spark plug from engine
2. connected to the wire
3. Make its touching engine body for earthing
4. Tried to start engine.
5. Noticed Good spark

Is this means even old spark plug is completely OK..? See video.
Any new suggestions based on this..? Should i continue to use old spark plug..?

Yes to the BiB, at least for the time being.

Can you confirm the spark in the video is at the tip of the spark plug, not between the threaded part of the spark plug and the metal of the engine.  It isn't completely clear from the video where the spark is.

What this test does tell you is there isn't a fault in the HT system, and the various safety interlocks (on the electrical side) aren't preventing the engine starting.

Fuel starvation now moves up the list.

If there is nothing on the fuel system you've turned off, then I think the most probable issue is oil getting into the carburettor.  So that needs inspection and cleaning, but isn't a novice DIYer job.  They are too delicate and finely adjusted to run the risk of damaging them by inexpert maintenance.  Others might disagree and give you advice on cleaning the carburettor, but think very carefully before taking that advice.

Yes, spark is on 5he tip of plug, not between  thread and body.

sujsuj

I am still see some petrol oil mix inside spark plug chamber. When I took out spark plug, tip was wet. But when trying to turn on no oil is spraying through spark plug hole.

benson1980

Have a look at some YouTube videos re carb cleaning. Really don’t get s62s reluctance for you to do this. Sure you can break something, as with anything diy but you really don’t have to be a master tech. Definitely the next logical step. Make sure you have a can of carb cleaner.

ThisIsWeird

Section62 said:

ThisIsWeird said:

'Microcracks' ma botty. Yes, we'll have to disagree!

Try google, rather than this "botty" thing.

ThisIsWeird said:

For the cost of a plug, I ain't going to entertain such extreme 'possible' scenarios.

I might agree if the OP had a shelf full of spare spark plugs. But he's got one.  Therefore it makes sense to not risk wrecking it without at least checking that the old one is faulty /the cause of the non-starting.

A second wrecked plug would mean waiting to get another one.

ThisIsWeird said:

Coupled with the fact that SS has no suitable method of getting that old oiled and carbonised plug suitably clean.

The obvious step then is to get what's needed to clean the old plug, surely?  As a keen DIYer the OP should really consider having a blowtorch in their toolkit, and getting one shouldn't take longer than getting yet another new spark plug.

As it happens, the old plug is apparently working just fine without needing extra cleaning.  Had the old plug been tested properly before taking the new one out of the box, the OP would now be in posession of a brand new shiny spark plug which could be returned for a refund, or kept for future use.

This is a money saving website, many of us would think saving the cost of a new spark plug worthwhile, especially if it can be achieved by nothing more than applying a little knowledge, logic and common sense to a problem.  Isn't that why we are all here?

Seemingly not :-)

ThisIsWeird

sujsuj said:

I am still see some petrol oil mix inside spark plug chamber. When I took out spark plug, tip was wet. But when trying to turn on no oil is spraying through spark plug hole.

Did you sniff the tip?

If so, what did it smell of? 

Does the wet tip dry by itself pretty quickly (a few minutes) when exposed to the air, or does it remain wet? If it dries, then it's petrol. If it doesn't, it has oil in it.

If it has oil on it, then clean it and get it fully dry (use petrol). 

If it dries by itself, then that suggests too much petrol, so the engine could be 'flooding' before it has a chance to start.

Do you have a motorists shop near by, or a good superstore? Can you get an aerosol of 'Engine Start'? If so, I think that's your next best step. Throttle on half-way (not choke), and follow what I said before.

As soon as your mower fires up, it'll all be sorted - most likely.