Please Help! Mercruiser 3.0 Stalling Issue

[jason soliday]

Having a issue with a 3.0 mercruiser The boat will run great in the driveway but as soon as I put the boat in the water and get under way It will just die out and have trouble restarting If It starts at all. Then when I get It back home It starts and runs fine. I put a water/fuel seperator filter on It and also rebuilt the carb, It also has a recent tune up. It Is running alot better since carb rebuild but when It goes in the water it idles fine around 500-600 r.p.m and as soon as I get under way It bogs out and then eventually dies out. I am at wits end and want to get the boat running right before it is put away for the winter. Thank you for any advice.

 

[JustJason]

Re: Please Help! Mercruiser 3.0 Stalling Issue

only because i have to ask.

Specifcally, and step by step, (I ask becaue you may have missed a step). What did you do as far as a "recent tune up" is concerned?

 

[jason soliday]

Re: Please Help! Mercruiser 3.0 Stalling Issue

Recent tune up includes plugs, wires, cap, rotor, condenser and points

 

[sarantis]

Re: Please Help! Mercruiser 3.0 Stalling Issue

take a look here.i think it's the same problem.
http://forums.iboats.com/showthread.php?t=264598

 

[JustJason]

Re: Please Help! Mercruiser 3.0 Stalling Issue

did you set the dwell and more importantly... set the timing?

 

[Don S]

Re: Please Help! Mercruiser 3.0 Stalling Issue

Is the stalling issue why you rebuilt the carb? or did it start stalling after the rebuild. Dwell must be set before timing as any change in dwell will change the timing.
While it runs ok in your driveway, but on the water it stalls may be because of a fuel system problem, you use a LOT more fuel on the water than in the drive, a plugged pickup, vent, antisiphon or even a loose hose clamp allowing the pump to suck air can cause it. Here is a method of testing.
http://forums.iboats.com/showthread.php?t=167561

You can also just hook up a remote fuel tank (Outboard tank) directly to the fuel pump and see if it cures the problem.