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    1979 Johnson 70 HP RPM question

    I installed a tach, but am not sure on what RPMs I should be getting as I don't have a service manual yet. Can someone please provide me with idle and WOT RPMs. On the muffs, it's reading 1800 high idle, 1200 low idle. Haven't had it lake yet this year.<br /><br />Thanks in advance....
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    1979 Johnson 70 tilt/trim down adjustment question

    I have a 1979 Johnson 70 with power tilt/trim. When it's trimmed all the way down, there are 2 rods that touch the motor and stop it from going any further. The motor then sits a few degrees up in relation to the boat, and contributes to proposing. I am not familiar with power tilt/trims...
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    Merc 110 9.8 fuel pump diaphragm gasket, which one?

    I diassembled and discarded old carb gaskets. After cleaning the carb and going to reassemble, I found that there are 2 different pump diaphragms in the kit, one is smooth black and the other is textured and lighter colored. I don't remember what came out of it. The manual I have only shows...
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    1976 Merc 9.8 rebuilt, won't go WOT...in forward..

    I rebuilt the powerhead with a new piston, rings, needle bearings due to needle bearings failing. Also relaced the damaged rod. I also rebuilt the carb, all using a Seloc manual. The motor ran, but I had trouble getting the idle set, and no WOT on the water. I took it into a marina and $130...
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    1976 Merc 9.8 110, water in lower unit

    I drained the lower unit fluid to see it was milky. I have rebuilt the powerhead with a new piston, rings, different rod, and needle bearings. I also did the carb and pull-starter. It runs good considering I'm a first-timer with a Seloc manual. My question is: I need to repair the water...
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    Need 9.8 piston, compatibility question?

    I have a 1976 110 9.8 #4544567 and need to replace a piston due to needle bearings failing and marring it up. I've been looking (and still looking) for a used one since new is around $130. Would a piston from Kiekharfer 110 model serial #293802 be the same? The information on the prospect...
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    1976 9.8 110, running WOT, locked up and died

    I recently got a 1976 Mercury 9.8 that had not been used in the past few years. I changed the impeller and it ran okay with the exception of a metallic rattling sound somewhere on top. I was cruising along with it pumping water for 30 minutes on a lake and at WOT it stopped abruptly. I...
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