1974 Evinrude , No power when put in gear

[khannah39]

Recently purchased a boat with a 50 Horse Evinrude, I think it is a 1974, the model number is 50473M, Can anyone tell me what the M stands for and if it is actually a 74? Also, it had sat up for about 2 years, I ran it the day I bought it and it ran like a champ, 2 weeks later I put it in the water again, and it would start but when put in gear would die. I replaced the plugs, and it started but once again when put in gear would die. Any help would be appreciated, the fish are biting.

 

[OBJ]

Re: 1974 Evinrude , No power when put in gear

Hi khannah and welcome to the forum.<br /><br />Yep, it's a 1974. The "M" basicaly is a "model" of the model. <br /><br />First, after setting so long, you probably got gas in the carbs that has "varnished out" meaning you got goo in there that is plugging your jets. Get yourself a manual, OEM preferred and rebuild the carbs. There's no voodoo or magic involved but a good manual will be a ton of help. You can get generic manuals from iboats or get a reproduction manual from Ken Cook Comp. <br /><br />You may also help yourself by also replacing the water pump impeller.<br /><br />Good Luck and keep us posted. If you have any other questions, please post....Thanks!.