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  1. Fishsqueezer

    Why set max spark advance @ 32* BTDC to attain 30*BTDC? Why use 33* BTDC w/ starter?

    I?m working on a Mariner 50 hp, 4-cyl, 2 stroke, electric start, serial # 6542853 Here is a page from the Mercury service manual regarding timing for my engine. The table at top shows specifications. Can anyone explain what the electronic timing characteristics are of this ignition system...
  2. Fishsqueezer

    Timing: How do I read my flywheel, and other timing questions?

    I?m working on a Mariner 50 hp, 4 cylinder, 2 stroke, electric start, serial # 6542853 1. Here is a photo of my flywheel. Are the numbers left of zero ?degrees BTDC? and the numbers right of zero ?degrees ATDC?? 2. The Mercury shop manual says to adjust timing in forward gear with engine...
  3. Fishsqueezer

    Walbro WMA 3 carburetor: float drop question.

    I?m using the Mercury service manual for my engine (Mariner 50 hp, 4 cyl, 2 stroke, electric start, SN. 6542853), but I?m still having a few issues. I installed a new white plastic float which only has one metal adjustment tab for float level, but no way to adjust drop. I?ve been able to get...
  4. Fishsqueezer

    Combining 36 volt and 12 volt together in one boat.

    Any advice on how to incorporate a 36 volt trolling motor into my boat?s 12 volt wiring will be much appreciated. The 12 volt electronics on my boat consist of: -outboard starter motor -power trim/tilt pump -bilge pump -live-well pump -Hummingbird fish finder -fore & aft running lights -3...
  5. Fishsqueezer

    Lower Unit Removal.....must I drain the gear oil?

    Hey everyone, I've found some great help on this site so far, and I'd welcome any advice on the following question from folks who are savvy to Mariner lower units. I'm about to remove the lower unit on my 2 stroke (c. 1984-'85) Mariner 50 hp 4 cyl. to service the water pump impeller. Is it...
  6. Fishsqueezer

    Thermostat on Mariner 50 HP 4 cyl

    I've been advised to change the thermostat on my outboard, but I'm having a very tough time locating it on the engine. I've been viewing diagrams on web sites that sell parts but can't seem to find it that way either. After looking my engine over several times, I still can't pick it out. The...
  7. Fishsqueezer

    Carburetor is squirting gasoline like it?s a water fountain!!!

    The Engine: I have a 1984 Mariner 50 hp 4 cyl. electric start outboard, serial # 6542853. It has dual carburetors, an upper and lower, each having an integral fuel pump. The upper crab is stamped WMA 3-1 and the lower is stamped WMA 3-3. The Problem: When I prime the engine by squeezing...
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