It's SOP to inspect & gap new spark plugs to your desired gap before installing them. They could have been dropped, thereby changing the gap, etc. NEVER assume they are gapped correctly out of the box. How does the manufacturer know what YOU are going to gap them at?
What should the ignition coil air gap be on a Husqvarna 372xp and is there a "special tool" to use to set it?
Husqvarna 372xp ignition coil air gap - Arborist, Chainsaw & Tree Work ...
The plug gap is a little small for that mild of a motor. I would run @ 0.045"-0.050". In fact when I first started running MSD ignitions. It was a 6al box with a pro-billet dist. an a 350 built up not much more than yours, and I ran a 0.045" plug gap for 3 yrs. I think the example from MSD below is a little wide in my opinion.
The different ring gap recommendations are confusing-----------not much consistency from several sources. So, what do the engine builders here recommend for gaps on the top and second rings (moly rings) on Speed Pro hyper pistons? I'm replacing all 8 pistons/rings. Here is what I found on on #1 piston.
The ten to twelve thou gap has been used for many electronic module chainsaws ever since they replaced the points condenser saws. . I dont have specific specs for the Echo saws lineup but I wouldnt be surprised at all if they used the normal gap clearance for their saws as well.
My haynes manual for my 85 camaro - refers to 305 bore and gives the top ring end gap as 0.10 to .025 - service limit .030 Does this apply to a 350? - what does the service limit mean? what are the stock specs for a 350?? I have a set of Perfect Circle standard rings - instructions say .016...