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Lawnmower head gasket - any ideas?


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I'm changing the head gasket on my Hayter 449f - it's got a briggs stratton (i think 675 engine). The problem that i've got is that i can't find any engine serial plate and so can't find anyone that will give advice on which gasket will fit it. So far, all of the suppliers have just said that without the serial no. they can't help...and so I've attached an image in the hope that someone in pigeonwatch land might know where to go next.

 

 

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Just did a google search and they look close, see what you think.

Hayter 449f head gasket 

it brought up several similar looking gaskets,  but slow tinter web won't let me load the pic.

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I once done one (can't remember what machine it was) I measured the thickness of the old gasket with digital caliper rounded it up to the nearest mm and got some copper plate and used that .... fixed it no problems

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Is there no way to use some of the liquid gasket type stuff, to either repair the old one, or take the place of it?

I know that with water cooled engines it used to be common to add "water glass" to the radiator to fix a damaged head gasket without having to remove it

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If you do make one out of thin copper sheet (not difficult), the copper will have work-hardened, so you will need to anneal it by heating it to red hot in a gas flame and plungeing it in cold water before use.

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Curious as to why it needs replacing? 

A light smear of Hylomar blue will seal even the hardest working Honda head gasket.

If you can jig up the facilities, give the head a lap on a sheet if glass with a bit of valve lapping paste and wd40. 

 

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