I have a Johnson j10rcom that has a leak at the top of the exhaust cover . Obviously i would like to change the gaskets out but it looks to me that the bottom right bolt is unreachable (underneath the motor mount .). Not to mention it looks like there is not enough clearance between the exhaust cover and engine housing to get the bottom bolts out . My question is do i need to remove the power head in order to replace the exhaust cover gaskets ? Than you in advance ! Tom .