I have a old 85-115 Evinrude (runs), Does not idle. I was curious if I can replace the carburators with TBI injection, I already have replacement electronic spark (Mallary multi-spark 6A). The brass carb adjusters (Syncro's ?) is missing (They don't make part anymore, cannot find replacement). Anyone help? I heard someone replaced coils with electronic spark, but I haven't heard of anyone replacing carbs with TBI. Thanks.