help reading feeler gauges

[dan28]

i need to reduce a plug gap to 0.80mm
none of the blades on my feeler gauge have specfic measurement on them

each blade has two numbers onit i assume the top number is metric

the blades i plan use to make 0.80mm look like this

022
559
mm

028
711
mm

030
762
mm

if the top numbers are metric then is that the correct measurement

i tried to convert 0.80mm on google an the figure it gave didnt add up to the lower number on the gauges

 

[RobMac]

31 maybe?

0.031 :?

.

 

[RobMac]

0.6mm - 0.7mm = 0.024" - 0.028" :?


.

 

[RobMac]

31 maybe?

0.031 :?

.

Yip its correct

0.03150 to be precise

.

 

[dan28]

thanks rob

i have no idea how you work it out though

 

[dan28]

the standard plug gap should be 1.1mm what will be close to this

 

[RobMac]

One of the blade should have 31 written on it or combine more that one blade to make up 31 thats if their imperial feelers your using.


.

 

[Mr Panda]

The upper numbers are in thousandths of an inch ie 0.022" which equals 0.559mm.

0.028" = 0.711mm

0.030" = 0.762mm

etc


So using that combination will NOT give you a plug gap of 0.8mm

You're not far awy though

As Rob says try to get it to around 0.031", or get a metric set of feelers

i need to reduce a plug gap to 0.80mm
none of the blades on my feeler gauge have specfic measurement on them

each blade has two numbers onit i assume the top number is metric

the blades i plan use to make 0.80mm look like this

022
559
mm

028
711
mm

030
762
mm

if the top numbers are metric then is that the correct measurement

i tried to convert 0.80mm on google an the figure it gave didnt add up to the lower number on the gauges

 

[biggs682]

i think you will find that most new spark plugs brought through a main dealer will be pre gapped to suit application intended

 

[dan28]

One of the blade should have 31 written on it or combine more that one blade to make up 31 thats if their imperial feelers your using.


.

30 is highest lowest is 005