My chessie has the same issues about 4 times a year. I think it is allergies it last about a week then he is fine. He is also 10yrs old in great shape it doesn't slow him down at all.
I live in maryland and they are trying to pass a bill where there would be a 50percent tax on ammo. so if you pay 20.00 a box the tax would be 10.00. so they can fund MENTAL HEALTH CARE BILL.
I also use one on my 50merc. I make my living on the water and use surf fishing spike on my 50hp with zero problems. Its what ever fits your need the ones i use are about 36 inches long.