06-08-2020, 03:16 PM
Hi peakay,
I did mine when I bought my 29 this year. I have Crusader 7.4 big block GM motors. The risers are salt water cooled but the Crusader exhaust manifolds are fresh water cooled. So I had to drain coolant out of the system before removing the risers/elbows or coolant would run into the exhaust gas side of the manifold and possibly into the cylinders.
Not sure if mercruiser has the same set up.
I have found on all the many boats I have owned, the engine manuals are worth twice the price, especially if you are interested in doing your own work.
Even if you don't do your own, it pays to be somewhat knowledgeable to keep from getting taken advantage of.
I would not be afraid to use after market parts from Barr or Sierra.
Regards,
Paul
I did mine when I bought my 29 this year. I have Crusader 7.4 big block GM motors. The risers are salt water cooled but the Crusader exhaust manifolds are fresh water cooled. So I had to drain coolant out of the system before removing the risers/elbows or coolant would run into the exhaust gas side of the manifold and possibly into the cylinders.
Not sure if mercruiser has the same set up.
I have found on all the many boats I have owned, the engine manuals are worth twice the price, especially if you are interested in doing your own work.
Even if you don't do your own, it pays to be somewhat knowledgeable to keep from getting taken advantage of.
I would not be afraid to use after market parts from Barr or Sierra.
Regards,
Paul
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