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    Mercruiser I/O Welch plug installation

    Instructions on the correct installation of a welch plug on the I/O? What do you guys use to install them? I installed this new one and it floated around until the permatex dried. I assume it's supposed to be a tight fit. (Photos attached, #5 on the schematic)
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    1966 Mercruiser 110 I4 153 Cui. Timing

    Which one is correct? #1 October 27th, 2004, 05:55 AM Re: Mercruiser 110 tune up specs plugs .035--pts. .016 or dwell 39 to 45 degrees timing 8 degrees at 800 rpm with mid grade gas. Run some product thru the engine before adj. the valves that may stop the noise. [ATF?] if that don't work...
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    Diameter questions

    What effect does changing the diameter have? Approximate RPM change? Faster acceleration or top speed? Is the manufacturers diameter accurate or is is rounded? My used props diameter measures around 13.75 but the manufacturer says it's 14" Thanks
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    Vibration noise near driveshaft

    I have a vibration noise when turning at slow speeds. Seems to be coming from driveshaft/hub area so I'm thinking worn splines on shaft/ hub since I just replaced the u-joints, gimble bearing and checked alignment. If I continue to use the boat will it damage anything that doesn't already need...
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    Normal stress cracks or rotten transom

    Normal?
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    Timing on a 1966 Mercruiser 110hp

    Where is 8 degrees?
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    66 mercruiser trim fluid level

    How full do I fill this pump?
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    Front Engine mount doesn't look right

    1966 v164 with 110 hp I-4. Front engine mount missing looks like it's missing a part. There is a gap between the bracket and the washer at the top 1/4" I can lift the engine up a little but the drive shaft seems to move freely in and out of the coupling so I don't know if I should leave it alone...
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