Honda BF2.3 no compression

[cliveshelton]

Yes another BF2.3 question I'm afraid.
It won't start and makes a squeaky noise when the starting cord is pulled see https://youtu.be/MppyIzHc9Fo


Was running smoothly at the start of the season.
Plenty of oil present.
Spark seems to be OK.
No compression when the starter is pulled.
I have put a little WD40 and oil in the spark plug hole and left for a while (a tip from a previous thread I think).
Fuel may be a little old, but that shouldn't affect the compression. Carburettor is not clogged as far as I can tell.
Engineer says its wasn't worth spending more than 30 minutes trying to find the fault. He couldn't. I'm £36 down (not too painful).
But I don't want to buy another one before trying a few quick fixes myself.
Any ideas?
Or should I sell for parts and start again?
Many thanks.

 

[cliveshelton]

oops. Wrong forum. Sorry chaps.

 

[LONG_KEELER]

Steve66 is our Honda 2hp expert.

I'm sure he will surface in the next day or two.

Got to be something like a stuck valve ?

 

[VicS]

Yes another BF2.3 question I'm afraid.
It won't start and makes a squeaky noise when the starting cord is pulled see https://youtu.be/MppyIzHc9Fo


Was running smoothly at the start of the season.
Plenty of oil present.
Spark seems to be OK.
No compression when the starter is pulled.
I have put a little WD40 and oil in the spark plug hole and left for a while (a tip from a previous thread I think).
Fuel may be a little old, but that shouldn't affect the compression. Carburettor is not clogged as far as I can tell.
Engineer says its wasn't worth spending more than 30 minutes trying to find the fault. He couldn't. I'm £36 down (not too painful).
But I don't want to buy another one before trying a few quick fixes myself.
Any ideas?
Or should I sell for parts and start again?
Many thanks.

I think I would have tried a little engine the cylinder rather than WD40 It would make abetter seal.
It may well be a stuck valve but worth checking the valve clearances.

You do not say what the "engineer" looked at though

 

[TQA]

Remove plug add a teaspoon of engine oil. Gentle pull then normal pull. If the compression returns you have piston ring problems.

If not then it is likely to be a valve problem. Before you do any dismantling check the valve clearances and see if the valves are operating normally.

 

[cliveshelton]

Thanks.
I don’t think the engineer did much other than top up the oil and changes the fuel, check the plug.
I’ll have a tinker tomorrow although I’m no mechanic.
You never know.

 

[steve66]

Hi its valve seat regression. Very common fault. I wouldnt recommend attempting it with the powerhead in situ.

 

[dash300]

Hi its valve seat regression. Very common fault. I wouldnt recommend attempting it with the powerhead in situ.

Would a spray of fogging oil in the cylinder over the winter layup prevent this problem?

 

[steve66]

Would a spray of fogging oil in the cylinder over the winter layup prevent this problem?

Hi. No. These engjnes haven't steel valve seats, poor low octane fuel doesn't help. Fogging oil is not really required over winter. These haven't a cylinder liner.

 

[dash300]

Hi. No. These engjnes haven't steel valve seats, poor low octane fuel doesn't help. Fogging oil is not really required over winter. These haven't a cylinder liner.

That's worth knowing, I'll try the higher octane petrol now, hang the expense!

 

[steve66]

That's worth knowing, I'll try the higher octane petrol now, hang the expense!

I wouldnt worry about higher octane. From experience i have found that engines that have been pushed hard especially on old fuel compounds the problem