EXEIIU

Hey so I have some questions on if my coolant seal is going bad or is fine.

So what's going on is my startup is very choppy (one rotor fire) for 7-10 seconds or less during this I get a small cloud of blueish white smoke (not oil as far as I know) which is making me think small coolant seal failure but the thing is I'm loosing a little and I mean a little coolant over a long time and it doesn't overheat but I get a LOT of bubbles in my coolant reservoir after shutting off and it isn't boiling or steaming just bubbles going back into it and it's only after shutoff so I'm thinking heat sink

It's not really hurting anything I'm just concerned about the one rotor fire (it also doesn't backfire badly during it, just sounds like a chainsaw)

Plugs have less than 100 miles on them, oil change was resent,
New gas and premix a little more than 1oz per gal with working omp, 127xxx running simi low compression with good power and difficult hot starts (if low compression could cause that choppy cold start) 1988 FC vert

Any suggestions or ideas will help

EXEIIU

Also I Should add that the bubbling is very quick and minor along with it also clearing up within 40 to 50 seconds after shut off I'm losing no coolant as far as I can tell the smoke on startup clears very quickly and it is pretty much a white cloud