Recent content by amajamar

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    Heat exchanger on FWC 350 Horizon

    SN OL675215. If I open the endcaps on the heat exchanger, what comes out? Raw water or coolant?? I was reading the manual, but the answer was not clear to me. I want to check for debris in there... Thanks!
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    Retorque bolts on manifolds... risers and elbows too??

    I have replaced manifolds,3" risers, and elbows on my OL677287 5.7 Horizon, and I have read to retorque the manifold to head bolts after bringing up to full temp. Does this also apply to the riser/elbow retainer nuts? I used the graphite gaskets on the job, if that makes any difference...
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    Proper use of Mercruiser fresh water flush kit wanted

    I have twin Horizon 5.7's FWC Ser#OL677287 with factory fresh water flush kits installed. My first thought was that obviously you close the seacock and hook up the hose and run the engines for a while and flush out the manifolds and risers. However, I rebuilt the raw water pumps this weekend...
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    Merc Manifolds and Risers... To Perfect Seal or not to Perfect Seal...

    ...that is the question. Again. I have read the Service Bulletin from Merc about the "new" graphite gaskets, circa 2001, that are to be installed dry. However, a search on this site and many others has turned up multiple posts from boat owners and marine mechanics who use Perfect Seal on...
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    Proper Engine and Tune Up Specs Requested

    After reading through the Manual 24 tune up specs (thank you Fun Times for the link) I notice that the Horizon variant of the MIE MAG 350 Gen+ is not specifically listed. My engine's, SN-OL677287, Merc parts breakdown shows a platinum spark plug (superseded to iridium), however since it isn't...
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