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    Help With Mercury 150 Efi Cylinders banks temps varying 200 vs 130

    Hi Gang - looking for some advice I have a 2008 Mercury 150 EFI Motor is on an 1988 Champion Bass Boat. I put the motor on new 3 years ago. Initially the new setup ran like an all-star. Really nice, smooth, turned up quick, got on a very controllable plane... all good. Cruised 40mph up and...
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    Champion Bass Boat long or short shaft

    Anyone know if a 1988 Champion 18-4" bass boat should have a long or short shaft Mercury outboard? The boat currently has a 2008 Mercury 150 efi short shaft. The motor seems to sit very low in the boat/waterline and if I was to use a higher mount it would no doubt have cavitation issues. (no...
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    Mecury 150 EFI, 2008 Alarm buzzes when ignition key is turned on

    When I turn on my ignition key I get a 2 second alarm. Is that brief alarm an indicator of a short? I read this in another post but can't confirm. - I thought this was just like an automobile and the alarm was just an warning indicator that the ignition was on and the motor was going to start...
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    88 Johnson Tilt Question - :)

    Not sure what's going on here... The tilt lifts in slow speed but when it hits the high speed it does not raise up. It holds in place when raised but the upper "fast speed" does not work. any ideas?
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    Testing Prop SIzes Need Advice

    I have an 18ft Champion with a 175hp Mariner. I was having trouble getting this boat to rev over 1800rpms and tried all sorts of fixes only to try some different prop sizes and like magic she ran. oh well dumb me. I am trying some different sizes but this is the prop thats on the boat now. 3...
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    What does the Switchbox do Troubleshoot

    Okay here are the symptoms and my tests. 175 Mariner 1988 Idles fine, idles in gear but WILL NOT go above 2krpms. It will just bog down, which I now know is a flooding condition. we have run a few on the lake tests. each carb is getting fuel new gas each cylinder is getting spark. kind of...
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    Jetting Chart for 88 Mariner 175

    Anyone know where I can see a jetting chart for a 1988 Mariner 175? I want to jet it for 4000 - 5000 ft The boat came from sea level and I took it to the lake to test. idles fine, throttles great in neutral, but when in gear, I can only get about 2k rpms out of it before it starts to stall. I...
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    Mariner 175 Wont Rev in Gear

    Hey guys - newbie here, I got an 88 Champion with a 175 Mariner, just replaced throttle tower and a bunch of little items. Put the boat in the water yesterday... no leaks!! But the motor will rev fine in neutral, put it in gear no problems, but when I start to gas it up it will go to about 2k...
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