Exhaust manifold smoke

Slqfisher · 11-21-2007, 06:17 PM

I just installed a new exhaust manifold on my OMC inline4 Ford and it was smoking pretty bad and it got really hot? I installed a used manifold because they don't make them new anymore. It came put together riser/exhaust manifold and I had noticed there was something jingiling around in it. I figured it was just something from the packing or some minor rust that would flush out when started while water and exhaust ran through it. Not sure why it was heating up so bad and smoking I did just install a new water impeller in the lower unit?? Any sugestions??

sosmarine · 11-21-2007, 06:33 PM

Obviously there isn't enought water getting thru to the manifold, orit is blocked inside preventing the water from getting out. Pull the hose going to it, run the engine and make sure you are getting water to it. I would recommend taking it off and use a garden hose to flush it out and check for flow. You might want to take the riser off and check too. What part of the country did the manifold come from?

Tuna Man · 11-21-2007, 07:07 PM

First I'd be very leery of a used manifold...I CAN tell you horror stories of what can happen to the engine when one goes bad. Yes if it's getting that hot there is a blockage, bad thermostat, a bad water pump. I have seen the impellers (fins) totally gone, even a incorrect gasket.Also if a I/O make sure water is in fact being pumped to the engine water pump from the out drive foot.

Slqfisher · 11-21-2007, 09:08 PM

I didn't ant to buy a used one either but they don't make them new. I ordered itfrom a boat yard in Ga.

Tuna Man · 11-21-2007, 09:12 PM

Quote:

Slqfisher (11/21/2007)I didn't ant to buy a used one either but they don't make them new. I ordered itfrom a boat yard in Ga.

:banghead:banghead:bangheadI searched and searched..couldn't find one new either.

Another thought...remove the water hose that goes through the transom (inside the boat) connect a hose there and check the water flow. You might have to remove the thermostat. Also check the water flow coming out of the water pump (engine water pump) to the engine if possible. Make sure the belt is driving the engine water pump. Hope one of our recommendations help ya. Something else..put cups on the lower unit turn on water, remove the hose going to the engine water pump, start and run for a MINUTE or TWO and see if the lower unit pump is in fact supplying water to the engine water pump.

sosmarine · 11-21-2007, 09:25 PM

What year and model engine are we working with?

Slqfisher · 11-21-2007, 11:20 PM

1989 OMC Ford 2.3L

Tuna Man · 11-21-2007, 11:51 PM

Call WWW.Partman.com @ 1-800-382-9335

OMC Ford 2.3L 4 Cylinder in line 1987-1990

Part # 986041 Ex Manifold

Part # 913393 Gasket - M to Head

Part # 912477 Gasket - Riser to Man

Part # 914766 Riser

http://marineengineparts.com/18%20ex...%20122-160.pdf PAGE 146

Slqfisher · 11-22-2007, 10:51 PM

Thanks for the info I'll give'em a try if mine is no good.. I hope it's something minor i'll check it out tom. I hope you had a good turkey day, mine just finished good food and friends...

Hook · 11-23-2007, 10:39 AM

You need to boil them out with acid each year.

11-21-2007, 06:17 PM	#1
Slqfisher Junior Member Cigar Minnow Join Date: Nov 2007 Posts: 24	Exhaust manifold smoke I just installed a new exhaust manifold on my OMC inline4 Ford and it was smoking pretty bad and it got really hot? I installed a used manifold because they don't make them new anymore. It came put together riser/exhaust manifold and I had noticed there was something jingiling around in it. I figured it was just something from the packing or some minor rust that would flush out when started while water and exhaust ran through it. Not sure why it was heating up so bad and smoking I did just install a new water impeller in the lower unit?? Any sugestions??

11-21-2007, 06:33 PM	#2
sosmarine Senior Member Sailfish Join Date: Sep 2007 Location: Navarre/Town Center Posts: 1,856	RE: Exhaust manifold smoke Obviously there isn't enought water getting thru to the manifold, orit is blocked inside preventing the water from getting out. Pull the hose going to it, run the engine and make sure you are getting water to it. I would recommend taking it off and use a garden hose to flush it out and check for flow. You might want to take the riser off and check too. What part of the country did the manifold come from?

11-21-2007, 07:07 PM	#3
Tuna Man Senior Member Grand Slam Join Date: Oct 2007 Location: Calera, AL....25 Miles S of Birmingham Posts: 6,583	RE: Exhaust manifold smoke First I'd be very leery of a used manifold...I CAN tell you horror stories of what can happen to the engine when one goes bad. Yes if it's getting that hot there is a blockage, bad thermostat, a bad water pump. I have seen the impellers (fins) totally gone, even a incorrect gasket.Also if a I/O make sure water is in fact being pumped to the engine water pump from the out drive foot.

11-21-2007, 09:08 PM	#4
Slqfisher Junior Member Cigar Minnow Join Date: Nov 2007 Posts: 24	RE: Exhaust manifold smoke I didn't ant to buy a used one either but they don't make them new. I ordered itfrom a boat yard in Ga.

11-21-2007, 09:25 PM	#6
sosmarine Senior Member Sailfish Join Date: Sep 2007 Location: Navarre/Town Center Posts: 1,856	RE: Exhaust manifold smoke What year and model engine are we working with?

11-21-2007, 11:20 PM	#7
Slqfisher Junior Member Cigar Minnow Join Date: Nov 2007 Posts: 24	RE: Exhaust manifold smoke 1989 OMC Ford 2.3L

11-21-2007, 11:51 PM	#8
Tuna Man Senior Member Grand Slam Join Date: Oct 2007 Location: Calera, AL....25 Miles S of Birmingham Posts: 6,583	RE: Exhaust manifold smoke Call WWW.Partman.com @ 1-800-382-9335 OMC Ford 2.3L 4 Cylinder in line 1987-1990 Part # 986041 Ex Manifold Part # 913393 Gasket - M to Head Part # 912477 Gasket - Riser to Man Part # 914766 Riser http://marineengineparts.com/18%20ex...%20122-160.pdf PAGE 146

11-22-2007, 10:51 PM	#9
Slqfisher Junior Member Cigar Minnow Join Date: Nov 2007 Posts: 24	RE: Exhaust manifold smoke Thanks for the info I'll give'em a try if mine is no good.. I hope it's something minor i'll check it out tom. I hope you had a good turkey day, mine just finished good food and friends...

11-23-2007, 10:39 AM	#10
Hook Senior Member Grouper Join Date: Oct 2007 Location: Gulf Breeze Fl Posts: 966	RE: Exhaust manifold smoke You need to boil them out with acid each year.

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