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    3.7L Merc 4cyl, Backfiring Issue and Ruff Idle

    I have a 1984 3.7L Merc 4 cylinder with the following verified set-up, new points with a measured dwell of 28, timing measured at 4 BTC. New plugs and wires, cap, rotor and coil. Rebuilt carb and set to factory settings. Idle screw is 1.25 turns out, also i replaced the float needle with the...
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    Electronic Ignition versus Points? Gain or No Gain

    Quick Question: How much performance have people gained or not gained when they replace points with electronic ignition conversion? I have a small 4 cylinder 3.7L 170hp and I am about to perform a tune up and I was thinking of changing out the points, it only will cost $100 bucks.
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    Coupler Life Expectancy

    I have 3.7L 4cyl 165hp engine. I had to take out the motor for a rebuild, bad bearing. I am trying decide whether I should replace the coupler while I have the motor out. How long should a coupler last for? I inspected the coupler and it looks like the rubber is in good shape but it has...
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    3.7L, 4cyl., merc470 bog, want to rebuild carb

    I have a 1987 Sunbird with the 4 cylinder 3.7L, 165hp, merc470 engine, the carb has the tag saying MCM 165, 1389-9564. I just started to the use the boat for the first time. The engine runs great at WOT and it idles ok, (I think I am have an exhaust leak). But when I have a tuber or a skiier...
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