I have had problems with low power, surging at lower Rpm's and complete dying while powering up. The boat was in the shop for 6 weeks with no fix done. 1 coil changed (Lower than others on KV Test), 1 head gasket changed (Merc.Rep. said might have a head gasket leak), head temperature sensor...
The 1st problem Low Power. 90% of the time it sounds like it is bogging when powering up. The other 10% of the time which is normally late in the day it has that perfect sound and great power.The next problem is 5 to 10 minutes after start-up while heading up river a little over idle it surges...
