Hi my motor is a 50hp us marine force(507F9B,s/n1254)and i have ordered my parts(impeller,head gasket, fuel pump repair kit)apart from the impeller(bolts on gearbox look all shiny and new compared to rest which all still have paint on so i am assuming impeller has been done in the past but i am not taking any chances as motor was left standing for 3yrs).all bolts on engine are like new i.e. still with paint on so no bolts have ever been touched,i do have a seloc manual but i was wondering will there be any common problems to be aware of in reference to dismantling?.<br />1:Impeller,change as not sure on condition,<br />2:Head gasket,i want to change as crystals and moisture coming out of gasket(i have noticed two gaskets here but the problem is on the gasket in contact with the block).<br />3:Fuel pump,hard to keep running when starting ie it will fire but either very low tick over or when throttle is applied via lever engine dies(if i apply throttle via carb instead i have no problems but motor was fine when i last used it 2 weeks before.<br />Are there ANY major do's and dont's here and what gasket sealant if any should be used,i have learnt that sometimes not all tips are in the manual so here i am.<br />I also like the idea of making up and connecting a pipe to the hole behind the thermastat thus making a visible jet of water instead of relying on the fine spray and that idea was taken off a topic here.
