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    Alignment Tool for Aplha One Gen 2

    The boat was shipped from Canada in a container. Due to its size, the container is tilted on its side so the boat can be loaded and secured. The container is then placed back upright for transport, meaning the boat travels across the ocean on its side. That’s likely the reason why the mountings...
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    Alignment Tool for Aplha One Gen 2

    Found also this checking transom drawing. Not sure but seems that its either u-shape type like I have or normal washer no. 7 Still need to figure out why gaps are not even or should it sit flat on washer.
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    Alignment Tool for Aplha One Gen 2

    It is newer style and what I meant asking for was a rubber washer (a on picture post 3). The one is on photo looks like plastic or this rubber washing is missing. From top it looks like this. I will probably have to lift back of the engine and see why one side sits lower
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    Alignment Tool for Aplha One Gen 2

    Thanks, checked before but images for some reason were not displayed, now i see it. I checked engine monuts on transom, and one side looks lower than the other one. And fiber washer (f) is it that black washer on my photo or is it missing.
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    Alignment Tool for Aplha One Gen 2

    Could someone please confirm if the alignment dimensions in the link below are correct? I had a part machined to these specifications, and it is very tight at the end. https://mbsmfg.com/MEATNR-E28/?srsltid=AfmBOoojVgnBBaKxKd9ZwmgQUm_FVsVvNzlCHOY1UINMLQt_SqTKotwV
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    Is was leaking from valve cover vent. Drive was checked for correct ratio and 1.62 was confirmed by turning u joint shaft 10 times and counting 6,2ish prop revs. Is the specification showed below correct for the alignment tool? The I borrowed from a friend and it look like machined in the...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    I referred to vacuum and fuel flow during idling for few minutes not revving. Vacuum is 3inHg lower and fuel consumption is 25-30% higher at idle with drive installed. That's why asked if that difference is something normal. I didn't check engine alignment at 12, 3 etc. I will check that. I...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    I also performed leak down test. First the cold engine readings were 25-32%. Then yesterday after waming up the engine and checking the engine max rev. At TDC worse cylinder improved from 32% to 25%, the rest show the same 5-7% improvement. Not to good anyway? Not sure what are good readings for...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    I read more about props I have. Asked AI to compare them both and find Black Max equivalent. No wonder dropping prop pitch by 2" didn't change much. 19" and 21" I have are pretty much the same - equivalent to 21.5-22" Black Max. What about trying 14.5x19" Black Max - that's standard for this...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    TDC was correct confirmed with inspection camera. First set best what I saw on camera and then checked TDC. Emailed Merc but seems that they wont tell anything more than is in service manual or published in bulletin. They told me what should be fuel pressure but nothing about vacuum or cam...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    Since I was checking the valve springs, I also verified the valve timing. For cylinders 1 and 4, the intake valve pushrod lift begins at 18° BTDC and ends at approximately 108° ATDC. I also checked refluctor wheel center where (part with no tooth) and is positioned 88deg BTDC - checked inside...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    In post #149 you mentioned that maybe I have overloaded engine - wrong prop, gear ratio, engine misalignment. Is it anything else I can check with drive? Also warn out or damaged engine was mentioned. What should I look for? I removed spark plugs, checked them and did compression test again and...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    I checked what you asked for with Diacom recording. Checked graphs, looking at demand, rpm and trim. From what I can tell optimal max trim for WOT is 5%. Anything above that causes only rev increase but speed on gps does not change. That's why on previous recordings you noticed quickly going up...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    It's not OEM lube its Motul Translube Expert 75W-90. I have garden hose and earmuffs I normaly use to run the engine to operating temperature and flush it after used in salt water. The boat is just next to my garage. I thought that I can run only on idle when water is supplied from earmuffs...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    Unfortunately the boat is back on trailer, my 2 paid months in local marina are over. Wish I tried that test on idle when the boat was still in the water. Any suggestions what I can check when on trailer - engine, drive? I already took the drive out and checked ratio 1.62 by rotating the shaft...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    @muc Please take a look at my recent Diacom test run. I did it using an external fuel tank. It was mailny test of WOT and playing with the trim. Conditions - flat calm, no wind. First run at 3000rpm to see what speed I'm getting on gps - it was 26mph. Steady plane at 3000rpm then trimmed up to...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    O2 sensor was replaced with new one. Before I got Diacom, the engine was checked by a marine tech and the only think he told me was that o2 needed to be repleced, because reading stays at the same level all the time. Little backstory about Bosch sensor. The original one was BOSCH 0258017 244...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    System voltage still drops to 10.2V. Checked @tpenfield files and both his V8 engines do the same while cranking. Maybe that's normal. Sea water pressue been an issue from the time it suddenly dropped and stayed like that (maybe 2 weeks). I will check that this week. Maybe its just he sensor -...
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    Mercruiser 4.5l low vacuum, WOT 4350 and higher fuel consumption

    @muc please see attached recent Diacom test run with new battery. Old one wast tested and it was time to replace it. Capacity was still ok but cranking current only 480A. New one is 850A Didn't notice any change in performance, still the same
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