The Mower Bench

[GardenKit]

How much are they barry?

Haha, I could not possible say. Well, not on the forum anyway.

So check your messages!

[GardenKit]

These are not for sale, they are customers machines I serviced this morning. The Toro is 10 years old!

They are both serviced every year. Its very satisfying to have work of this nature.

 

[mikerecike]

General question. What are the likely causes of a mower backfiring. SV150 flat head engine on a cheap b &qish mower. Timing? Had the flywheel off - key is fine. Could carb play a role?

[GardenKit]

General question. What are the likely causes of a mower backfiring. SV150 flat head engine on a cheap b &qish mower. Timing? Had the flywheel off - key is fine. Could carb play a role?

I assume you do actually mean backfire, rather than misfire?

If so ,its usually a sheared flywheel key, but you have checked that.

So it could be the coil gap, or even a duff coil.

 

The carb obviously needs to be functional and clean.

 

But it could be the valve clearances. Those engines are also prone to head gasket failure, so worth popping the head off for a decoke, adjust the valves and replace the head gasket.

 

Or better still, bin it.

[mikerecike]

 

Or better still, bin it.

 

How did I know that was coming? Lambs to the slaughter 😀😀

 

Ok cheers for that Barrie - a bit more to go on.

[BILLSMOWERS]

General question. What are the likely causes of a mower backfiring. SV150 flat head engine on a cheap b &qish mower. Timing? Had the flywheel off - key is fine. Could carb play a role?

i have some spares if you need anything give me a shout:thumbup1:

[mikerecike]

Thanks Bill

[mikerecike]

OK maybe it was a misfire not a backfire I'll have to get to grips with the difference . Anyway I changed the sparkplug from a QJ 19LM to a new BR2LM and it's firing smoothly . Cheers Barrie

[GardenKit]

OK maybe it was a misfire not a backfire I'll have to get to grips with the difference . Anyway I changed the sparkplug from a QJ 19LM to a new BR2LM and it's firing smoothly . Cheers Barrie

Aha, the power of NGK

[harrythecat178]

Japanese quality or chinese c**p even in spark plugs, you cannot even to begin to understand why they skimp on plugs for a few pence