Mercruiser Aluminum Intake Question

[Trudy]

My rebuilt 5.7 mercruiser intake manifold blew a hole during sea trials yesterday. My mistake for re-using the old intake, it looked fine. It blew a hole out one of the exhaust crossover ports.

I have an Aluminum Edlebrock Intake in my shop, it is not lined with brass, it is automotive. I would like to throw this on and get me through a season of boating. Replace it next year with a new intake. It is raw water cooled, and the engine stays on a mooring where it cannot be flushed. Will this aluminum intake survive the next 4 months?

My next question is- where can i find the correct adapter to use a 2 barrel mercarb with the new edlebrock intake designed for a 4 barrel carb? I’ve seen them out there

Thanks!

 

[wellcraft-classic210]

R us sure the old intake was bad?

Were the heads or deck milled that might affect alignment?

 

[Scott Danforth]

My rebuilt 5.7 mercruiser intake manifold blew a hole during sea trials yesterday. My mistake for re-using the old intake, it looked fine. It blew a hole out one of the exhaust crossover ports.

I have an Aluminum Edlebrock Intake in my shop, it is not lined with brass, it is automotive. I would like to throw this on and get me through a season of boating. Replace it next year with a new intake. It is raw water cooled, and the engine stays on a mooring where it cannot be flushed. Will this aluminum intake survive the next 4 months?

My next question is- where can i find the correct adapter to use a 2 barrel mercarb with the new edlebrock intake designed for a 4 barrel carb? I’ve seen them out there

Thanks!

salt water? fresh water?

are you sure its the manifold and not a gasket? (I would check first)

if fresh water, then yes, the aluminum intake would work. however suggest epoxy lining the water jacket at a minimum. even fresh water corrodes aluminum.
if salt water, then no, it will disappear

as for the adapter, your local automotive supply shop, mercruiser, volvo, etc.

https://www.summitracing.com/search...Order=Ascending&keyword=2 barrel carb adapter

 

[Trudy]

Thanks for the responses guys. See the attached picture. the plate over this exhaust crossover blew out and was shooting out exhaust. I would just replace the plate.. but the bolt holes are too far gone. It is raw water cooled, i guess i wont bother with the aluminum intake i have. I will buy a brass lined intake. Thanks!

 

[Scott Danforth]

that is the EGR cross-over, not used on boats.

get a helicoil kit for the bolt holes, get a new gasket, be boating in 20 minutes

 

[Bondo]

Ayuh,..... Welcome Aboard,..... I'm with Scott,.... An easy quick cheap fix,.....