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    Lower cable bad?

    74 Larson Trihull Mercruiser 140hp I/O How much force should it take to move the lower cable? When I disconnect the cable from the linkage and try to move the cable by hand, it takes quite a bit of effort to get it fully engaged so the prop will stop turning. Could the cable be bad? What's a...
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    140 Engine tapping noise when hot

    We had the boat (1974 trihull Merc 140 I/O) on the lake for the weekend and had a great time. However after the engine gets hot there's a tapping noise that seems to be coming from the top half of the engine. It's a metallic tap rather than a heavy clunk, gets louder under heavier load (more...
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    Idles better, but not done yet

    I had some questions about setting my idle on my 140 (see http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=24;t=011752#000003). Things are better but not perfect yet! Here's where I stand so far: dwell set to 30, idle on water is 600 (off water about 750), timing @ 6. The...
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    Merc 140 with bad idle

    I've got a 1974 Mercruiser 140 that I need to set properly, but I've got questions about the specific techniques for doing this.<br /><br />I set the dwell using a dwell meter while cranking it over with cap/rotor removed. Is this sufficient or do I need to somehow check it with the engine...
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    Mercruiser 140hp not running right

    I've got a 1974 trihull with a mercruiser 140hp. Last year I could get 4000-4500 rpm wot depending on the prop. Over the winter I took the boat to the shop and had the timing and carb adjusted (it would not idle properly and was difficult to restart). I tested it on the muffs and found it to...
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    Merc hard to shift ... sometimes

    74 Larson trihull with Mercruiser 140hp I/O.<br /><br />I replaced the lower shift cable this spring. I can shift just fine sitting in the driveway. However when out on the water after pulling a tube (or otherwise going fast) it's very difficult to shift to neutral or reverse. Hard to move the...
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    140 Merc Gimbal Bearing Question

    I've got a mid 70's Merc 140hp I/O that been making noises. Last night I pulled the drive off and the gimbal bearing is bad (rough when I turn it). However the entire --- bearing? moves forward and backward 1/8" or 1/4" in the housing. I'm not talking about the inner race, it's a circular thing...
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