[bigdog]

Thanks for all the suggestions, much appreciated !

FYI as follows:
1995 4.3LX Mercruiser 220HP
Not electronic ignition

Again... engine runs fine 'out of water' even revving....

Marine mechanic performed following checks:
- Carb kit just installed (new jets, needles, springs, accel pump, etc)
- Carb float is metal not plaastic type.
This was not replaced with as part of rebuild kit. Tech said it was OK.
- Distributor cap and rotor OK
- Fuel pump, they said was OK, but not sure if tet performed?
- New plugs installed (by myself)
- Fuel/water filter replaced twice
- Coil cable looks good, but did no check perfomed on coil

Using an Aux. gas tank to test is a great idea, but doesn't look like it would be a simple adaptation hookup, between tank and gas line feed?

Going to siphon out as much gas as I can, and replace with fresh gas.
Adding some more Gas line water remover treatment, and maybe some octane booster. Can't hurt at this point !

If this fails, going to contact another marine dealer to see if they can perform gas removal and discard old gas ? TBD?

My guess is that all systems are OK, and the 'ethanol' gas is the culprit !

Thanks again!
Bigdog