Bongo Fury

What spark plug gap should be set on an LPG 2.0L?
Thanks in advance.

I believe normal gap is 1mm, but you usually reduce by 0.1mm for gas, or buy LPG specific plugs which will be pre-gapped correctly.

It should tell you on the packaging or plug code what the gap should be (recommended by the manufacturers ) for the best results/performance for that particular plug. Its always worthwhile checking the gap prior to fitting ,it has been known for the plugs to be bashed about a wee bit.

I thought plug gaps were specified for the engine, not the spark plug - have I been wrong about that for most of my life?

I thought plug gaps were specified for the engine, not the spark plug (i.e. you could have the same spec plug in 2 different engines with 2 different gaps) - have I been wrong about that for most of my life?

Generally it seems that the model of plug is recommended by the manufacturer based on the gap for the engine it is being used for. That makes sense as I can't see Mazda employing a man at their factory with a set of feeler gauges checking and adjusting every plug they fit as they take them out the packet

psquiddy wrote:I thought plug gaps were specified for the engine, not the spark plug (i.e. you could have the same spec plug in 2 different engines with 2 different gaps) - have I been wrong about that for most of my life?

The plug gap recommended by the technicians is what has been found to give the best results from that particular plug (under compression conditions). The the engine manufacturer's order what is best for their power units.

When the engine builders fit the plugs they check the gaps, any problems later on the line they could lose the old p bonus ,most of the guys have a very good eye.

In the past we cleaned and check a lot of used plugs using the old Plug Doctor, great bit of kit, it took a lot of the guess work out of fault finding.

Check the code and you should be ok.

Good Luck.