150hp mercury black max

[pppsmurf47]

I took oil injection off idles rich do I need a hotter plug and what plug do you all recommend Thanks

 

[alldodge]

The original oil injection system vary's the amount of oil from around 100:1 at idle to 50:1 at WOT. Going to premix makes it rich at idle like in the old days. So now you have a smoker just like in the old days.

I would keep the plugs as-is and only think about changing after some time. Going to a hotter plug may cause the motor issues at higher rpms

Other opinions may be along shortly

 

[Chris1956]

A lot of those motors were converted to premix. I have one and it runs perfect.

If your motor won't idle well, the carbs may need some attention.

 

[pppsmurf47]

I haven't had it on water since I removed oiler .On rabbit ears at idle it seemed rich smoked quite a bit but knew it would going to put in water and run awhile see what it does

 

[QBhoy]

I’d rather see her smoke than not. Well played to pre mix these things. I learned the hard way as a younger man. Not so often the pump it’s self fails. More the oil lines or fittings usually.