1st generation 502 EFI
My friend/mechanic Henry has a Baja 240 sport. Back in the early 90's his friend who owns one of the largest Mercruiser dealership(s) in the States had a few Mercruiser 502 EFI's that just came out. So he replaced the 260/alpha with this package for basically peanuts as these engines were factory test engines. Again this guy got stuff from Mercruiser because he was so large, etc. Well a year or 2 later his ECU or ECM whatever they call it went south. When they sent it back to Mercruiser for replacement the company sent out their "Men in Black" to his bud's marina. So it goes these were experimental EFI engines and were supposed to be destroyed. What they did for my bud was they gave him a brand new EFI 502 with the 2nd gen Bravo one, racing throttles and a few other gadgets and a mean warranty in exchange for what he had....no brainer. Well since then his engine will only rev to 4750 not the 5050 or 5150 it used to, no matter what prop he uses it is now a 65mph boat, not 72. They obviously gave him the wrong ECM but he doesn not want to spend the $$ for a new one as the 240 gets pretty squirley above 65 anyway. Has anyone experienced an ECM that limits their throttle that low? He literally can put a 19 prop or a 25 and it goes 4750 and the speed varies...obvioulsy hitting a rev limiter.
Nick
1994 22' Classic-454 B1 Red & white
1981 13' Whaler sport(original owner)
South Tampa Bay, FL "May I mamoo dogface to the banana patch?"