Re: Islander 221
The internal engine parts are the same for cars, trucks and boats. For example pistons, rings, bearings, crankshaft, engine block, pushrods, connecting rods, rocker arms
the list goes on and on. The type of parts you should buy for marine applications are mostly on the outside, stainless spark plugs, brass soft plugs (freeze plugs), spark controlled electronics such as distributor, alternator, starter or anything else in the engine compartment that can cause you to blow up if the is ever a presence of fuel vapors and a spark. For the most part these are just automotive parts that have been modified for marine applications. They put a screen on all the ventilation holes of wherever a spark can occur, how this would stop fuel vapors from entering is beyond me? If your parts are exposed to the elements including the cooling system like soft plugs, cooling circulating pump (water pump), thermostat by all means go with marine parts for durability, unless you have an enclosed cooling system auto parts would have short lives and even if you do have an enclosed system youd want the most durable parts possible, its a long walk home when your on the water. For the most part you do not have to be a mechanic to know which automotive parts can be used instead of marine, just think of the safety, and durability factors involved. If your not mechanically inclined enough to know any better buy marine parts.