There are four of them. I have till Wed. If cant do it i will bring it to MArk in Burbank.
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Not to hijack, but which screw would adjust the carb for altitude?
Does not exist. The 60 has a HAC built in that I think advances the timing a bit. I've never been convinced it does much.
The way I think about the Aisin carb is that it isn't really adjustable, except for idle mixture. The main and secondary are only adjustable by disassembling the carb, and swapping out the jets. The other screws are just set screws that adjust how far the throttle opens under various conditions, like when the choke it pulled or the ac comes on. They don't adjust fuel mixture at all.
That is what I thought too, but after I moved to Colorado, people have told me that I need to tune my carb for the altitude. It does fine up here, but I was wheelin' at 12,000' altitude a few weeks back and my engine died. Others with the Aisin who are from Colorado can go above that altitude. I am not sure what the difference is, but theirs somehow can make it higher than I can go.
Not sure I would attempt anything until you grab (or download) the FSM.
That's scary, "lean drop"?
Does this explain the method, or the result? I don't want leaned out cylinders...
The HAC does advance the timing, but it also leans out the primary hi/lo and secondary hi speed circuits. Maybe your HAC isn't working properly?