Re: lower end
make sure the exhaust pipe is inline, and the water tube is moved to insert position also make sure your shift shaft is in nuetral and the shifter is in neural. If you removed the cam on the shifter shaft make sure it is in the right position. the cam locks the engine down in reverse so the engine dosn,t rise in revers. if this is not correct the push pin will destroy the cam and you will have to replace it. also make sure you exhaust pipe gasket is right side up this will not only destroy the gasket it will definitely hinder the lower unit from going back up