40 Mercury Smoking

[CajunChristian]

Yes, check into getting that oil injection removed before you have to buy a powerhead. I have never kept an outboard past the warranty period without removing the oil injection. If I mix it, I know there's oil in the fuel.
It's very easy to remove, BUT, make sure whoever removes it knows what they're doing. DO NOT leave any of the oil lines to and from the oil pump open. It will cause the bottom cylinder to run lean, again you will be buying a powerhead.
As for excessive smoke, you first have to determine if it's smoke or steam. Could be steam from the water outflow from the engine. Your oil injection could be out of adjustment and the pump is dumping too much oil to the motor at WOT, another reason to remove it. Mercury sells a kit with an aluminum plate and gasket to cover the oil pump drive hole in the block.
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[meaux fishing]

Originally Posted by CajunChristian

Yes, check into getting that oil injection removed before you have to buy a powerhead. I have never kept an outboard past the warranty period without removing the oil injection. If I mix it, I know there's oil in the fuel.
It's very easy to remove, BUT, make sure whoever removes it knows what they're doing. DO NOT leave any of the oil lines to and from the oil pump open. It will cause the bottom cylinder to run lean, again you will be buying a powerhead.
As for excessive smoke, you first have to determine if it's smoke or steam. Could be steam from the water outflow from the engine. Your oil injection could be out of adjustment and the pump is dumping too much oil to the motor at WOT, another reason to remove it. Mercury sells a kit with an aluminum plate and gasket to cover the oil pump drive hole in the block.
D

Very good advise. I burnt up a merc at dark halfway between the lake and 210. I was Lucky that another boat passed me and towed me back

[troy001]

i have a 40 hp tohatsu 2004 model how would i have to go about to remove the oil injection system

[CajunChristian]

Originally Posted by troy001

i have a 40 hp tohatsu 2004 model how would i have to go about to remove the oil injection system

I'm not trying to be a smarta$$, but if you have to ask, get someone qualified to do it. Is it worth saving a few dollars to possibly toast your motor?
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[troy001]

well i am ase master certified on heavy duty diesel just wanted to know if you had to remove the oil pump or leave it on and just block oil lines

[CajunChristian]

Originally Posted by troy001

well i am ase master certified on heavy duty diesel just wanted to know if you had to remove the oil pump or leave it on and just block oil lines

I remove every hint of the oil system, lines, check valves, pump, drive gear, bushing, all of it.
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[Andy C]

Originally Posted by troy001

i have a 40 hp tohatsu 2004 model how would i have to go about to remove the oil injection system

Not as important on tohatsu as they are gear driven like a Yamaha, not a vacuum system like merc has.

[CajunChristian]

The 40/50/60 Merc is a gear driven oil system, not a vacuum driven system. So it is every bit as important on Tohatsu's. A leak in an oil line causes a catastrophic failure regardless of brand.

http://www.crowleymarine.com/mercury.../11493_110.cfm

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[troy001]

thanks guys

[Marshgoat]

Thanks for the advice guys. In your opinion what is the biggest danger, the pump itself failing or an oil line breaking? I've researched a little and it appears some people have had Mercury oil pumps fail due to a plastic gear or bushing in the pump coming apart. Not sure if a 99 model would have plastic or not???. I guess you can tell I would prefer to keep the injection system but I also don't want to ruin a powerhead. Boat has a permanent fuel tank built as a step up to the front deck, I switch back and forth to a surface drive a couple times in a year so premixing fuel will be a little pain in the @#% every time I switch back to the Prodrive.

[Andy C]

Originally Posted by CajunChristian

The 40/50/60 Merc is a gear driven oil system, not a vacuum driven system. So it is every bit as important on Tohatsu's. A leak in an oil line causes a catastrophic failure regardless of brand.

http://www.crowleymarine.com/mercury.../11493_110.cfm

D

That's my bad,thanks for the correction
all the mercs I have had were vac.
sorry for the miss info