I have a 2001 Viper Cobra 190 with 200 HP Mercury EFI. I got a new power head 3 years ago and now my mechanic told me I need a new one again. I really don't want to go this road again after spending $7K three years ago. So my question is, does it make sense to re-power? The new Mercury 4-strokes 175 HP are about $12,500.00 Would that give me enough power? Any advice appreciated.