i have two yamahas 250 1995 replaced the seastar cylenders on both steering still hard no problem with the helm pump, and i disconnected the tie bar between engines and cant move them manually should i try to use heat and try to melt down old lube adding new lube ? i have done this in the past and it has worked . rather than taking the engines apart. they do move when i turn wheel they are not completeley frozen its just hard. Thanx in advance