There are lots of offers of compression testers around. But do any of them fit a Seagull head? I suppose what I'm really asking is, is the bore and thread of a spark plug hole so standard that, even after the move to the metric system, it remained the same?
If a specific fitting is required does anyone know what it is please?
Thanks.
Compression Test
Moderators: John@sos, charlesp, Charles uk, RickUK, Petergalileo
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Re: Compression Test
I use one similar to this one and works perfectly well in any seagull.
It also has adapters for smaller or larger plug holes so plenty of options.
https://www.ebay.co.uk/itm/Draper-37442 ... Sw8RZaYJRT
Jon
It also has adapters for smaller or larger plug holes so plenty of options.
https://www.ebay.co.uk/itm/Draper-37442 ... Sw8RZaYJRT
Jon
- fleetingcontact
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Re: Compression Test
Thanks for the reply Jon
I guess that you use the 18mm adaptor? I know that 18mm plugs are used in Seagull heads but surely the measurement does not refer to the thread and pitch of a Champion D16 (for example)?
I guess that you use the 18mm adaptor? I know that 18mm plugs are used in Seagull heads but surely the measurement does not refer to the thread and pitch of a Champion D16 (for example)?
- Charles uk
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Re: Compression Test
A D16 has an 18 x 1.5 mm thread, as do all the classic seagull spark plugs.
Make it idiot proof and someone will make a better idiot.
- fleetingcontact
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Re: Compression Test
Thanks Charles.
Re: Compression Test
Ebay thread adapter. I have one of these.
I was going to make one but for £3 odd it wasnt worth setting up the lathe.
I was going to make one but for £3 odd it wasnt worth setting up the lathe.