i bought a 7.5 johnson sea horse model j8rcic. what year is it? i think its a 1981. what oil and mixture do i use? what can i do to keep it in good shape? right now it cranks in three pulls. thanks
Welcome 742!<br /><br />Yep, it's a 1981. Oil mix is 50:1. Use a good tcw-3 rated outboard oil.<br /><br />Somethings I recommend on a "new" used outboard, do a decarb and then take a compression reading and keep it handy for future reference. If you don't know when the last time the impeller and t-stat was serviced, that would be a good idea to do. Replacement of both is inexpensive and easy to do.<br /><br />Use a fuel system cleaner in your fuel like BRP's 2+4...it's cheap to use and will keep the gas fresh.<br /><br />Check your lower unit frequently if the engine is used a lot. I would hope you have already done this. Water in a lower unit can get expensive.<br /><br />Get a service manual. OEM's are preferred. Read it and follow it's guide lines for engine care. OEM reprints are available through several different Co's. like Ken Cook Co. Just do a search on the web. Generic service manuals are available also....check the bottom of the page here for manuals.<br /><br />If you have any questions about the engine, you can post them here....good help here on the forums.
thank you for answering my question. this is my first motor on a boat so i dont know all the language that goes with it, like whats a decarb,tcw,brp, impeller, t-stat, and water in lower unit mean. <br /> thanks
