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I ran the engine for 3 minutes and tried to thighten the head screws. They hardly moved.</p>

However, the glow plug was not thight at all. Someone had told me not to do it too tight.</p>

I was able to turn the it 1/4 of a turn with not much effort.</p>

Was the glow plug supposed to be thight?</p>

Thanks,</p></font>