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4.3 MERCRUISER TBI PUT NEW MANIFOLDS ON ENGINE, STARTED

Customer Question
4.3 MERCRUISER TBI PUT...

4.3 MERCRUISER TBI PUT NEW MANIFOLDS ON ENGINE, STARTED ENGINE DIDN'T LIKE SOUND ALSO NOTICED WATER LEAK FROM TORX PLUG ON TOP OF MANIFOLD ON CYLINDERS 1,3,5, SIDE. SECURED TORX PLUG PROBLEM WENT TO RE-START ENGINE GOT LOUD POP ASUME WATER TRYING TO COMPRESS. TOOK OFF MANIFOLD ON SIDE THAT LEAKED WATER FOUND WATER IN EXHAUST PASSAGE. LITTLE WATER ON PLUGS 1,3,5, CHANGED OIL AND PLUGS CLEANED OUT SPARK PLUGS HOLES WITH COMPRESSED AIR. HAVE NEW MANIFOLD ON IT'S WAY. ALSO NO WATER IN OIL CHANGE ANYWAY. NEW MANIFOLD WILL THIS TAKE CARE OF PROBLEM.

Mechanic's Assistant: What part of the car is the leak coming from? And are you sure it's water?

IT'S LEAKING IN EXHAUST MANIFOLD PASSAGE ON 4.3 MERCRUISER MARINE ENGINE

Mechanic's Assistant: What is the make/model/year of your car?

4.3 MERCRUISER BOAT ENGINE TBI 1998

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

GOING TO PUT A NEW MANIFOLD ON THE SIDE THAT GOT WATER.

Submitted: 8 months ago.Category: Boat
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Answered in 36 minutes by:
11/20/2017
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 17,894
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
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H​ello my name is ***** ***** am I speaking with? I read what you wrote, are you using factory Mercruiser parts or aftermarket parts? Did you check and see if the gasket mating surfaces were actually flat by laying a straight edge across them?

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Customer reply replied 8 months ago
THE ONE THAT WAS ON THERE I SURE WAS BAD THEY WHERE AFTERMARKET MANIFOLDS. ORDERED NEW MERCRUISER MANIFOLD. MATING SURFACES WHERE GOOD. ONLY HARD THING ABOUT IT IS GETTING THE 3 INCH SPACER FROM NOT MOVING WHEN YOU PUT ELBOW DOWN ON IT TO MAKE SURE STUDS ARE IN PLACE. THE OTHER SIDE OF ENGINE WAS CLEAN WITH THE AFTERMARKET MANIFOLD. ENGINE ONLY RAN FOR 15 SECONDS BEFORE SHUTDOWN. USING STAINLESS STEEL GASKETS, AT PROPER TORQUE SPECS.
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago

What kinds of questions did you have on the issue exactly?

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