Re: 81 Glastron SX-190 Transom and Engine- PICS Galore Update 11-8
i was told once that some marine motors run reverse of the auto and that the cams were ground differently
googled marine motor vs auto
http://www.hotrodders.com/forum/marine-vs-auto-blocks-95180-3.html
"Just about any Auto engine will work fine in a Marine application, EXCEPT that some marine engines are Reverse Rotation,and a auto engine will not work in place of it. And that alot of auto parts are the exact same as the marine parts, except the marine ones say MARINE on them and cost twice as much
Just make sure you use marine headgaskets and coast gaurd approved electronics, and you should be good to go. Also, use the marine water pump to. Most Marine water pumps will work on either a reverse or standard rotation engine, wear as a auto water pump, will only work on a standard rotation engine. And the Marine water pumps stand up better to corrosion."
"Yes the cams are usually ground to make power below 4500 rpm. Above this rpm, cavitation of the prop/water rears its ugly head"
"there is no real diffrence in the blocks themselves. Some have a specialty coating for the waterpassages to help prevent corrosion. The main diffrence between the two are the carbs and the cams. You can't use a auto carb for a marine engine or you will get a heafty fine from the coast guard, and second is most marine engine from GM are rollers."
"I'VE BUILT HIGH PERFORMANCE BOAT MOTORS FOR YEARS. HERES THE DIFERENCE FROM CAR MOTORS. 1) bronze freeze plugs are required because regular metal ones will rust through. 2) Carberator must have the vent/overflow pipe that is bent back into the carb. You don't want gas in the bilge. These pipes are sold, dont try to bend a stright one. 3) Alternator must be spark free type. Buy a regular marine alternater. Wire the engine in a professional manner and have fun. No other diferences between motors inside.STU"
joe
lol
