just a quick enquiry to the gurus out there.
After removing the engine for working on the diff. i loosen too many head bolts to attach the lifting lug
anyway i have to replace the head gasket.
There is quite a bit of carbon build.
Question is this a fuel problem setup/timing problem or other?
the pistons and head were fully overhauled and has only done approx 2000 miles.
just looking at an old post Doc mentioned this can be from age but as my engine hasnt done many miles

viewtopic.php?f=2&t=28042&p=361316&hilit=carbon+build+up#p361316

pistons seems to be cleaning up ok with a scourer.
will tackle the head and check valve seats tomorrow.
Thanks in advance

running a little rich & yes you have a blown headgasket

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

I have used Citric acid a lot to clear rust.
How would it go on head. Anyone tried?

I have used CLR to clean the carbon build up on my rotors in my rotary engines in the past it works wonders.
Give that a shot.