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    Switch Box Suggestions

    Was able build a DVA adapter and test things out further. Blue wire to ground gave me only 18 V. Editing to add that I noticed that shaking the wires caused the blue voltage to get above 200 intermittently. Blue/white gave 400 V All other measurements in spec. So I gather from this that the...
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    Is a Mariner 115 any good?

    A guy in my area is selling a 115 Mariner. No year, but from what I can tell, it's a 94-96. It runs but has a crank shaft seal leak. Controls included. Are these motors any good? How much of a pain is it to change the seal? Thinking of changing from my '84 Merc 90 Tower of power. Any idea...
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    Switch Box Suggestions

    Thanks for that info. I have stuff on order to build a DVA adapter. In the meantime, what if I swapped the switch boxes (since I have two on this engine) to see if I get spark in those cylinders.
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    Switch Box Suggestions

    I found a local guy selling used, tested OEM switch boxes. I read that you should replace both together, but was wondering if this is still true if you aren't going to replace with a new unit?
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    Switch Box Suggestions

    Thanks for the replies. I assume finding used OEM switch boxes on eBay is a little risky as well as they may be due to go bad? I was planning on going through the carbs and doing a link and sync. Do you guys have any specific recommendations on the settings for that? I understand using...
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    Switch Box Suggestions

    Hi all. I have an 84 Merc 90 2-stroke in line 6. I took it out for the first time this year last week. At home starting it in a tank, I was having some trouble, so I used some carb cleaner and sprayed it into the carbs while cranking and she fired up, idled and ran well with a bit more...
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    Tower of Power Cold Start Questions

    Thanks for all of these tips! A couple more questions. - when I'm cranking, and the solenoid kicks out (I think this is when all 6 cylinders don't fire together) should I keep pushing the key in? Or does this mean that fuel is close enough? I gather I found prob crank for a couple seconds and...
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    Tower of Power Cold Start Questions

    Hey all. I got an '84 Merc 90 inline 6 2 stroke. I know they are notoriously tough to cold start mine is no exception. I know the procedure to pump till the bulb is tight, put throttle up and either hold the key in to activate the fuel enrichener for 8 seconds, then start cranking, or start...
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    Did my lower unit get damaged?

    I'm in the process of changing out the water pump. I noticed that this area around the shift shaft was the area that connects to the holes where I saw oil leaking out as I noted above. Does this mean that the shift shaft seal is actually what is leaking?
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    Did my lower unit get damaged?

    Thanks so much for the replies. I had changed the impeller about a month before this, I wonder if I disturbed the seal somehow when I was working in there and inspecting the housing. Anyway it sounds as if the process of changing the pump housing will fix this issue so that's great.
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    Did my lower unit get damaged?

    Hey all. Last fall, I was late getting my lower unit drained before a good cold snap. Afterwards I found oil had leaked from a hole just in front of the vent plug. I had never seen this before so I was wondering if this indicates there was some damage inside from the freeze. Does oil...
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    Mercury fuel filter question

    Hey all. I have a 1984 Mercury in-line 6 cyl 90 hp. Wanna change the in line fuel filter. I've never picked up a filter for an outboard before. Does the filter need to be anything special for outboard application or for my particular engine? or will any run of the mill in line fuel filter...
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    Downrigger setup on a Starcraft Holiday

    Hey Guys. I managed to pick up a couple Scotty manual downriggers at a farm auction for a whole 2 bucks for the pair. The have the C-clamp type mounts on them and the arm is about 12 - 16 inches long. I am wondering how I could set these up on my boat, I have a 1961 StarCraft holiday 18...
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    1984 Merc 90 inline 6 trim pump fill

    Hey guys. I'm doing the spring maintenance on my 1984 Mercury inline 6 90 hp for the first time. I don't have a manual for this outboard, but do have a Clymer manual for the 1964-1971 engines. I know these engines are pretty similar. I want to make sure the trim pump reservoir is full, but...
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    Starter disengages before starting

    Gotta 84 Merc 90 hp inline 6. When pulling my boat out after winter this year, first time trying to start it, I turned the key and the engine turned over once or maybe twice and then the starter seemed to disengage, or at least the engine was no longer turning over and it sounded like the...
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    Merc 90 Lower Unit Capacity

    Anyone know the gear lube capacity of the lower unit gearcase on a 1984 Merc 90 hp inline 6? Thanks for the help.
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    Trolling Motor Questions

    Hey all. I am thinking about getting an electric trolling motor for my boat. Its an 18 ft starcraft holiday with a 90 hp inline 6 merc on the back. I assume I need at least 55 lb thrust, and would prefer to stay with a 12V system. Since I have a closed bow with a fairly high front end, I...
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    Filings in Lower Unit oil

    Hey all, lookin for some advice. I have a 1985 merc 90 inline 6 outboard. Last fall, while winterizing, I drained the lower unit and found some filings in the oil. There were quite a few stuck to the drain screw and in the oil. The oil didn't seem to have signs of water intrusion. I'm...
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    Do I need to do more for winterizing?

    I have a 1985 Mercury 90 hp outboard. This is my first time winterizing an outboard, so need some advice. I ran the engine with stabilized fuel (long enough to get the fuel throughout the engine) and then disconnected the lines and ran it until the engine stalled. I put the engine...
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    Is it safe to run my engine wide open throttle?

    The other day I went out tubing and found myself wanting to run full throttle all the time while pulling people on the tube, I guess I really wanted to dump them. I have a 1984 Mercury 90 hp in line six 2 stroke, on an 18 ft starcraft holiday. I got to thinkin if it is safe for my motor to be...
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