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    What temperature is overheating? 1988 Mercury 45 HP Pro Fifty

    I'm trying to diagnose why my overheat alarm goes off. After replacing a bunch of things, I am starting to think I just have a bad temp sensor and it's sending a faulty signal. I brought my infrared thermometer out on the water the other day and the hottest from what I could tell was 140*. I...
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    New carb needle doesn't "hang" on float tab like the old one did...ok? Illustration

    New carb needle doesn't "hang" on float tab like the old one did...ok? Illustration Long story short, I replaced the float needle (among other non fuel related things) on one of my carbs in hope it would prevent it from spewing fuel out the front when priming. The motor is a 1988 Mercury 45hp...
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    Need the part number for nuts that go on the studs which hold down the power head...

    It's no where to be found in the schematics, does anyone know the part number for the nuts that go on the studs for the power head? There are 8 of them. The motor is a 1988 Mercury 45 hp Pro Fifty/4 cyl 2 stroke. Falls under serial numbers 0B110789 and up. Also, if you have it, the part number...
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    Fuel shooting out of top right corner of carb when priming fuel bulb...new float?

    I'm putting in an order online as we speak and I was wondering if I needed a carb float or anything else with this issue. The boat otherwise runs good (minus overheating issue) I just don't want to start a fire or something because a lot of fuel comes out if I prime it too much. Do I just need...
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    Printing pages from the manuals in the FAQ - all pages are black

    Hello. Anyone know how to print pages from the manuals listed in the FAQ? I'm trying to figure out how to remove a power head and it would be nice to print some pages. When I try, they all come up as all black pages
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    Problem, pics and hypothesis...what do you guys think?Overheating...powerhead gasket?

    So, you can see in the link below that I have been having overheat issues: http://forums.iboats.com/mercury-mariner-outboards/1988-mercury-45hp-pro-fifty-overheating-issues-pictures-story-videos-included-605656.html In these pictures, you can see water and burnt oil/gas mixture escaping...
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    1988 Mercury 45hp Pro Fifty Overheating issues - Pictures, story and videos included.

    Starting a new thread because my other one has an unclear title and someone's posts were lost (which seemed very valuable). Lets start from the start. I bought a 1976 Boston Whaler with a 1988 Mercury 45hp, Pro Fifty model, 2 stroke and 4 cylinders. It didn't start right away but after a...
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    Removing exhaust plate cover on 1988 Mercury 45hp Pro Fifty - how to

    Hello. I am having some overheating issues with a 1988 Mercury 45 HP. I've already changed the impeller and there is no poppet valve assembly nor a thermostat on this engine. After reading the thread linked below, it looks like I need to remove the exhaust plate cover and search for potential...
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    Good preventative maintenance for 2005 Yamaha F60 TLRD?

    I just bought a 2005 Yamaha F60 TLRD thats been giving me issues. I am going to be buying the yamaha manual and a new fuel pump and I was wondering what else I could replace while I am down there. The previous owner claims to have just done the 200 hour service but has no proof. He also changed...
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    2005 Yamaha F60 not getting full power....suggestions?

    Hello, I have a 2005 Yamaha 60 4 stroke (F60TLRD) which is not running correctly. I just bought it and the 3 times I have had it it does not run right. It starts right up, revs fine and moves at idle speed fine for as long as you want. Then, if you give it throttle it will get the boat right up...
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    2005 4 Stroke Yamaha 60 HP has loose washer, how to get to it? Diagram included

    Hello, I have found that part number 9 in the following diagram is loose and making a pinging noise when I run the motor. I am not sure if the nut holding it down is loose or missing, because it is covered by the stator and a bracket. I would think I need to remove the stator and rotor assembly...
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    My 2004 Mercury does not have an air intake filter....normal?

    I have a 2004 40hp 2stroke Mercury outboard. We just bought it and today I was messing with a couple things when I decided to check the air filter. Well I took off the box/housing that mounts to the carbs expecting to see an air filter in there but there wasnt one. I didnt see a place for one to...
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    Will be towing my 13' Whaler with a small car, estimated weight of boat+trailer?

    How much can I expect my 1961 13' Whaler to weigh (the motor weighs 205 pounds) with the trailer? Thanks!
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    Can not get 40hp Mercury to trim all the way down,

    I have a 2004 Mercury 2 stroke 40hp. The trim and tilt was very weak because it could not build pressure. We brought it to a mechanic, he told us what we needed to replace but since I have a friend that owns a Mercury dealer, we can get parts for very cheap so i got the boat back from him. When...
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    Trying to get 1994 Suzuki 25 ready for sale....what can I do?

    I have a 1994 Suzuki 25 that used to be on my boston whaler. We replaced it because it did not run very well, and would not idle. It would start, and run if we kept the throttle up, but as soon as you get off the throttle it would die. What could I do to keep this thing running reliably, so I...
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    Is the only difference between a Mercury 40 and 50 hp the carbs?

    I heard this from multiple sources and was thinking about converting my 2004 Mercury 40 to a 50 hp. Does anyone have other information on this?
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    How to identify which alarm and why it is ringing?

    Just got a call from my dad. We bought a 04 Mercury 40 2 stroke recently and he just finished putting it on a 13 whaler. The previous owner has bypassed the oil mixing pump/injector and now we have to mix it our selves which is apparently a safer method (im not too siked about the idea, I would...
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    Carb on 1994 Suzuki does not spray fuel...how to fix.

    I have an old motor that I want to clean up and sell but I can not get it to run. It is a 94 Suzuki 25 hp with 3 cylinders. If I start it with starting fluid it will start, and with enough throttle it stays running, but if I looking inside the carbs it looks like 1 carb isnt spraying enough fuel...
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    Any propeller recommadations for a 2004 Mercury 40hp and a Boston Whaler?

    A mini restoration is going through on my 1962 Boston Whaler and the last thing I need is a propeller for my recently purchased motor. It is a 2004 Mercury 40hp 2 stroke and it will be powering a 13' Boston Whaler. Any suggestions for a good propeller thats not too expensive? Thanks!
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    What do you guys think about this motor for my 13' Whaler?

    I found this : http://www.boattrader.com/listing/2004-Mercury-40-15%22-92656942 It looks perfect HOWEVER the "fresh rebuild" scares me. The guy says the oil pump failed so he replaced the pistons/rings in it and now it should be like new. Im worried about the quality of his work and why the...
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