If so what are the positives and negatives of the engine. I am looking into a couple of boats that have these and was needing some opinions.

It's a good motor provided it's not used up.  Should have a compression check/leakdown test and run at idle in a tank or lake to listen for excess piston skirt tick.   If the VRO is still connected, it should be replaced or disconnected and premix the gas.  The VRO is approx $300 plus the labor to replace but at that age, it's on borrowed time if it hasn't been replaced in the last couple of years (since 1999).  It's easy to tell if it has the update VRO, you will see an extra (purple) coming out of the connector and going to the terminal block.   They are a little gas thirsty.   As with any used motor I buy, I would replace the water pump/impeller and drain and catch a couple of ounces out of the gear case to check for excess metal and water.

It does have oil injector that is the original I was plannin on disconnnecting it. Is that a simple matter just disconnecting it or is their more to it.

Thanks for your help

It's simple to disconnect, all you really have to do is unplug the 4/5 pin wire connector going to it and the two pin connector going to the oil tank so the no oil alarm sounds.  You can take the remaining oil out of the tank or just let it burn it out if there's not much left.  Burning it out will double mix the engine until it's used up because you really should premix as soon as you disconnect it.

The problem you will probably be faced with is the fuel pump side may  fail before much longer.  You can buy a fuel only pump that looks just like it and bolts into the same bracket when it does fail, it's cost about $160.

Ben thanks alot. I appreciate your help.