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    Winterizing for in water - engine raw water drain

    sorry for the delay - I thought I sent this a week ago. Thank you.
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    Winterizing for in water - engine raw water drain

    This looks like the "Mercruiser hypercomplexification drainage system" on my engine. I drained the water from the component circled in green. According to the part diagram/list #10, highlighted in yellow, is the "HOSE Cylinder Block Drain". To me, this indicates that the block water is...
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    Winterizing for in water - engine raw water drain

    This looks like the "Mercruiser hypercomplexification drainage system" on my engine. I drained the water from the component circled in green. According to the part diagram/list #10, highlighted in yellow, is the "HOSE Cylinder Block Drain". To me, this indicates that the block water is...
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    Winterizing for in water - engine raw water drain

    Even if I did pull the boat from the water, how do I get the water out of the block?
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    Winterizing for in water - engine raw water drain

    I'm on the Chesapeake Bay in the middle. Low temps next week will be in low 20s with highs in the mid 30s. I'm not sure how cold and for how long temps need to be to potentially cause problems with water in the block? Any thoughts?
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    Winterizing for in water - engine raw water drain

    There is no clog. My engine doesn't have blue wing screw plugs under the manifolds. the hoses under the manifolds all lead down to an aggregation point on the lower front port side of engine. That aggregation point has a blue wing plug that drained.
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    Winterizing for in water - engine raw water drain

    Yes. Blue plastic wingnuts with threads but mine were not under manifolds. One was on port down low where hoses came together. Two on starboard near water pump? One up top on center forward area. And one on cool fuel module. Drive is underwater but ill look for the winterization guide. Thanks!
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    Winterizing for in water - engine raw water drain

    I have 2005 MAG 350 MPI engine S/N 0W067905. I have my Cool Fuel module removed so I cant run engine to winterize by flooding engine with antifreeze. I removed the 5 blue plugs from the engine to drain cooling water. I am concerned that the engine block still has water in it. Do I need to...
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    WOT RPM Low. MAG350 MPI B3

    Did a compression test today. 170psi pn all cylinders. Was going to do leak down but valve cover removal is difficult because of fuel rail/exhaust headers. Will use borescope later to confirm TDC. Pulled the CoolFuel module. Will take home and disassemble and check interior paint. Broke...
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    WOT RPM Low. MAG350 MPI B3

    I verified the fuel pressure gauge this morning against a couple other gauges and compressed air at different pressures. It is accurate. Heads/valves were serviced because two valves tuliped and engine wouldnt run right. Cleaned injectors while heads were being serviced. Ill have to rig a...
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    WOT RPM Low. MAG350 MPI B3

    Could the regulator be under performing?
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    WOT RPM Low. MAG350 MPI B3

    Fuel pressure did not exceed 44PSI (it was 35psi) so I proceeded to step 5. With engine running and fuel valve shut off, fuel pressure stayed at 35PSI as vacuum on fuel inlet increased. Fuel pressure eventually dropped as engine started to sputter because of lack of fuel.
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    WOT RPM Low. MAG350 MPI B3

    13v dc on Cool Fuel electrical connector. Ran fuel vacuum and pressure tests. Fuel source test 5d showed 1-1.5 in hg vacuum (within spec). For 5e test, restricted fuel supply and vacuum eventually reached 12 in Hg while rail pressure was 36psi. Rail pressure eventually dropped to 15psi as...
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    WOT RPM Low. MAG350 MPI B3

    Thx. I found that advertisememt on a site but when I click through, it says item not found. If i can figure out the size and thread on existing connection, can i just insert a marine grade fuel cutoff valve?
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    WOT RPM Low. MAG350 MPI B3

    Says sold out but there are similar looking valves advertised for "Fords". Do you think they are interchangeable?
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    WOT RPM Low. MAG350 MPI B3

    Thx. I don't see Fuel Shut Off Tool (91-805918A1) image or availability on-line. How do I shutoff fuel flow? Hose Pinch Pliers?
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    WOT RPM Low. MAG350 MPI B3

    Serial Number : 0W067905 Model Number : 4442077TS Sterndrive S/N OW260110 Finally got a fuel pressure gauge with correct Schrader valve fitting. Fuel rail pressure is 34-36 psi. Seems to hold around 34 psi. Still need to test compression Still need to index distributor per manual...
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    WOT RPM Low. MAG350 MPI B3

    Does the fuel pressure change with RPM? My crab cap is 2yrs old.
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    WOT RPM Low. MAG350 MPI B3

    Haven't compression tested since new heads/valves. Can do soon. Props are original. Is fuel pressure available through VesselView and/or RINDA? Has crab cap. Injectors are OEM. Just recently serviced and tested good. I'll reconfirm firing order. And check linkage and ensure full open...
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    WOT RPM Low. MAG350 MPI B3

    My Mag 350 MPI only hit 3870 RPM with throttle lever all the way down. Clean hull. New valves, heads, injectors. Could it be a linkage issue since I had to reassemble the linkage?
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