Re: 84 evinrude v4 carburetor
Agree with Fastbullet. The factory varies the jet sizes and the size of the carb throats in order to make different hp engines (as well as other tuning tricks, heads, timing, exhaust, etc.) I would be concerned when you say you purchased NOS carbs. If they were NOS, the factory carb part numbers: 393769/770 would already have jets in them. Bolt them on and go..If you bought new carbs, but another part number, you need to make sure the carbs have the same throat size cast into the front flange of the carb (like 1 3/16) Also, your carbs have 3 jets per cyl. Some of the older carbs only have two, so confirm what you have. Depending on what you bought, it could have different size jets which could be a problem.