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Recent content by BIGFLAT

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    Cooling issue/ low pressure w/ 150 Mariner Mag III

    Changed the water pump (kit) in March. No change in water pressure. ( old impeller looked real good) Pulled and cleaned the poppit. No change. Ran it with out thermostats, ran it w/o poppit, no change in water pressure. 8# at 4000. Tattle tale stream looks real good. My record book shows when I...
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    Water pressure fluctation and rising temp on 150 Mariner( new Pump)

    I can't seem to figure out what's happening on my '95 150 mag III. I just changed the water pump about a month ago, and still have the same problem. When I start up and get on top, the water pressure goes up to about 20# and stays there. The temp indicator starts rising and climbs to half to...
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    Evinrude lower unit lube plugs for a Mariner???

    I just got finished changing the lube in my 95 Mariner Mag III lower unit. The plugs have slot type screw driver 'notches' in them and they need replacing. Some where I read the Evinrude plugs have 'Allen head' "notches" in them.. Anybody know if the thread size and the diameter are the...
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    How to test engine Alarm

    '95 Mariner Mag III 150 HP There is a current post regarding a constant alarm problem. It got me to wondering if my alarm for temperature is working. I have a temperature indicator, and my oil injection is disconnected. If memory serves me correctly, when I turned on the key, I got a beep,beep...
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    Tach / Voltage Question ' 95 Mariner 150HP Mag III

    I've been trying to isolate the cause of my tach falling to about 400 RPMs when running. Most times it happens in the middle of the day as the temp rises. The first time I noticed it, I had just made a hard right turn. As I went straight ahead a lil later, the needle was in the correct range. I...
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    Water Pressure- Cooling prob 150 MagIII on startup

    "95 Mag III. Water pump changed 2 yrs ago, good water pressure during normal operation. However, when I first get the boat up on a plane, the water pressure swings up to 20# and stays there and the engine temp goes to 3/4 of dial (indicator, no degrees). After a minute or so the water pressure...
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    TIP ( water in lower unit lube)

    Since my 150 Mariner is almost 16 years old, and having spent quite a bit of time in a chemical plant, I am a firm believer in preventative maintence. I change the lube in my lower unit every 4 months. Last year about this time I noticed a small amount of water in the pan when I drained the...
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    Changing outer seal in lower unit

    I've got a lil water in the my lower unit oil. Is it a big job to change the outer seal? Are they any 'traps' that I should be looking for? Thanks
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