The carby kit finally turned up at the local automotive store. Unfortunately it had the older black gaskets in it but that’s life. Removing the rock hard old gaskets took some persuasion and was by far the hardest part of the refurb. Once installed it certainly has cleaned up throttle response but if anything highlighted the miss fire even more.
After that not helping I did what I should have done at the start and tracked down a compression tester. Cylinders 1, 2, 4, 5 and 6 had 125psi which is great for the inline 300 but......that leaves cylinder 3. Cylinder 3 has ZERO PSI. Damn it.
Haven’t had a chance to look into it yet but thought I should put a bit of an update in here as it’s been a few weeks. Hoping it’s a valve issue and nothing too sinister. From memory they were the valves which were a bit sticky when I tapped them prior to putting the lifters, rods and rockers back in place. I’ll do a dodgy version of leak down testing to source the issue as soon as I get a spare couple hours.
Other than this I’ve tidied up some grounds and replaced a few perished cables. It now cranks over as it should instead if being very lazy. Have also removed some suspect brake line sections which I will have made up replace for piece of mind.
If I’m not back in here beforehand, have a decent Christmas period and thanks for the help with my first project of the transportation type.