Yes, the 30 weight will really slow that pump down in cooler weather. If you live south, then you should be fine. and especially if there is some oil left in the reservoir. The hose probably got jostled druing the battery install or when someone was messing with something in the bilge. Folks can put their feet int here, or hit them with a battery and those hoses move some, which loosens the fitting. Learning is a part of getting up in the morning! We sure dont want to quit it! BCB PS: Sorry for the trouble on this as the rig is newer and little quirks and things like this do pop up, though shouldnt! We know that!