Thank you for contacting the AnwerARMY.
The tank vent is designed to allow atmospheric pressure into the tank to prevent vaccum being formed in the tank as the oil is pumped out. The vent does not allow pressure build up in the tank to escape.The pressure build can cause oil to be pushed through the oil pump through contraction and expansion. The manual does cover that oil and fuel should be removed before long term storage.
The chain should be tight and should have a good snap back to it when attempted to stretch. Your description sounds good for adjustment, you may want to have a dealer actually look at the chain adjustment to verify it is correct.
Thank you for contacting the AnwerARMY.
The tank vent is designed to allow atmospheric pressure into the tank to prevent vaccum being formed in the tank as the oil is pumped out. The vent does not allow pressure build up in the tank to escape.The pressure build can cause oil to be pushed through the oil pump through contraction and expansion. The manual does cover that oil and fuel should be removed before long term storage.
The chain should be tight and should have a good snap back to it when attempted to stretch. Your description sounds good for adjustment, you may want to have a dealer actually look at the chain adjustment to verify it is correct.