The saw sounds as though it has a rev limiter on it. I also checked the compression and it is hitting right at 170psi. By the way, $400.00 is a real good price for the saw, as long as it does not need any extensive top end work; as you could be looking at having another $350.00 tied up in it. I'll pull out my tach a little later and tune it again. I have mostly worked on older saws so any information is well received. This saw is a good bit different from my sp125 McCulloch. I found the saw in Florida in a miss labeled listing. I offered the guy $850.00 shipped and he bit.
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