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  1. W

    Does this water pump base require shimming?

    Hey Merc vets please help by loking at this pic. This is my first water pump replacement on my '76 850 thunderbolt. The manual says I need shimming if there is a one piece driveshaft bearing. It looks like two pieces to me. I didn't see any shims when I took it apart. Also as a side...
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    Filling the lower unit..The lower plug 850 Thunderbolt circa 1977

    I have a hard time believing that I fill the lower unit from the lower plug. Before I take it out I just want to make sure that I don't damage it. I filled it to where you start to see some fluid coming out of the upper air hole and tried to get the fill plug back in ASAP but if you have done...
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    Hard to turn over Merc..Now what

    Thanks to the help from Chris1956. You were right I don't have an '82 motor. My last post wasn't concise so here is the deal. I have a 1977 Thunderbolt 850 (85 hp) that is still hard to turn over. I have replaced the starter and the battery and put WD-40 through the plug-holes and it turns...
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    Starter vs. "partially seized"

    Hello all. Thanks for making this forum worthwhile. I would really appreciate your ideas on my '82 850 Merc problem. I bought the boat not running recently. The seller said it had electrical problems and that it ran last year. It turned over by hand and the price was very good so I bought...
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