I have a 86 Ranger with 86 Evinrude xp150. My first boat and still a newbie
Motor recently tune and decarbed by shop. Motor runs great on muffs. fires quick and pees good. On lake motor pees good but don't have PSI gauge to measure

Gone to lake twice boat will run a while but won't crank back up. Starter will spin then kick out. If boat does fire won't idle and runs rough. Been towed to shore twice. Replaced starter runs on muffs fine ran it about 20 minutes killed it and started it back 5 = 6 times not problem.

Mechanic said carbs dirty just put in seaform and run her to clean out. Well same problem ran her 30-35mph around lake for 20-30 minutes then she just died in middle of lake. Waited 30 minutes and started back up went slow to dock and she would not start back

Went home and ran boat on muffs looked at carbs did not see fuel leaking or puddleing. I fear shop will rebuild carbs run in tank and everything will check out then have the same problem at the lake

Anyone know the answer