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    "premix" additives in oil

    If I wanted to more or less constantly add de-carb and stabilizer to my fuel, could I just add it to the TCW3 oil? I premix and keep a supply of oil on the boat to measure and add whenever I fill the built-in tanks. By doing this, the fill up procedure would be quite a bit cleaner and simpler...
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    Champion vs. NGK, and hotter vs. cooler

    My little Merc calls for a Champion L77V. Couldn't find any, and local Merc dealer sold me NGK BUHW2 saying it was a good plug for this engine. Later, looking at a cross reference, I see the L77V actually cross references with the BUHW and the BUHW2 cross references with the Champion L78V...
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    Merc 9.8 hp spark test?

    In my quest to smooth out the idle on my '74 Merc 110 (9.8) I discovered last night that the bottom cylinder is not firing properly. <br /><br />Last fall, it idled rough, but functional, and ran at high speed better. At trolling speed, it was a little rough, but worked fine for several long...
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    Mystery part - Transfer Port Drain?

    This is the 1974 Merc 110 (9.8) that I've gotten a lot of advice on. I'm not a mechanic and appreciate the help on what are probably easy jobs, but new to me. <br /><br />There's an external part on the engine that my OEM shop manual doesn't even show, and the Seloc manual shows, but does not...
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    carb cleaning/rebuild - idle problem

    Hi: I did what I think was a thorough cleaning of my carb and it didn't seem to help much. Here's the facts:<br /><br />Merc 110 (9.8 hp), 1974. I bought it cheap last year and it ran OK, but not great - a little hard to start, tended to die at low idle. The only adjustment on this carb is...
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    Carb. Gaskets

    Doing a carb cleaning this weekend. The carb gasket kit I thought I'd ordered from local dealer turned out to be what is probably best called a fuel pump re-build kit - has the diaphragms and gaskets for the fuel pump, but nothing else. This is my first time doing this so I hadn't noticed this...
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    advice needed - drive shaft seal

    Hi: I've posted regarding my '74 Merc 110 (9.8 hp). Look soon for a progress report on my first carb clean/rebuild!<br /><br />RE: the lower unit. When I bought the motor last year, the lower unit oil looked good, compression was good, and it ran pretty well, so I bought it. After trolling...
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    carb rebuild/clean '73 9.8

    I've posted in the past about this engine and have received advice on cleaning and rebuilding carb. I ordered a "rebuild kit" from the local Merc dealer and received it. It only has gaskets and he doesn't show any needle valves or floats available. I checked on line and couldn't find them...
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    Signs of Pre-ignition and Detonation?

    In a recent discussion on octane, people talk about the danger of preignition and detonation if octane is too low.<br /><br />What exactly are the signs of pre-ignition and detonation in a large (V6) two stroke engine?<br /><br />I've been using premium (90) fuel because I was told I should do...
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    9.8 stuck prop adventure

    Bought an early 70s Merc 9.8 hp late in the summer. I've been fiddling with it - trying to get it to run smoother, winterizing, etc. So, I go to remove the prop just to check it out, etc. and it's stuck fast.<br /><br />3 days later, I've got it off, a little scarred and minus the rubber...
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    Merc 9.8 rough idle

    This is my second attempt at posting this message. I haven't seen it show up yet (it's been two days), and apologize if this is a duplicate.<br />-------------------<br />Hi: I posted earlier about a '74 Merc 110 (9.8 hp) that I recently acquired. The thing starts and runs tolerably well, just...
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    Merc 9.8 hp - rough idle

    Hi: I posted earlier about a '74 Merc 110 (9.8 hp) that I recently acquired. The thing starts and runs tolerably well, just a little rough. My previous post mentioned that partly for this reason, and partly "for the fun of it", I was going to rebuild the carb. Probably will, but...<br /><br...
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    Merc 110 carb. clean or rebuild

    How hard is this project?<br /><br />Just acquired a '73 or '74 Merc 110 (9.8 hp). It runs pretty well - I spent 3 fairly long days trolling with it with a couple of periods of WOT just to see how it goes. It starts reasonably well and after warm up, idles fine. The idle is a tiny bit rough...
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    dual bilge set up

    Can anyone advise me how to install two bilge pumps?<br /><br />This is a small, 21 foot runabout type boat. The bilge area is the length of the boat, but only a few inches deep (between the hull and floor boards).<br /><br />Right now, I have one small bilge pump with a 1 1/8 inch outlet...
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    Product Report - Fuel Flow Meter

    Synopsis: I'm happy with the product, and out of the box, it is within the stated +/- 5% accuracy.<br /><br />Long version: I bought a Standard Horizon fuel flow meter last summer. I had defect issues, but both were handled to my satisfaction. First the sender was bad and, with an email from...
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    Drooling fuel when tipped up

    This is an 82 175 Johnson V6 w/o oil injection. It is equipped with a jet lower unit. Because of this, the motor does not extend below the bottom of the boat and therefore is rarely tilted up. For example, I launch and trailer it in the upright position since there's no danger of it being...
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    twist handle slips - older merc 110

    I have an old Merc 110 (9.8 hp) from the 60s. This has a rubber grip on the twist throttle. This slips when the throttle is turned, and slips right off the handle. I tried gluing it with some marine adhesive / sealer (looks and acts like silicone) and it didn't really work.<br /><br />Any ideas?
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    Starting Problem Johnson 175

    I would appreciate any insight or words of wisdom.<br /><br />This is an older V6 carb'd engine (1982) but "remanufactured" in the mid 90s. <br /><br />I have an in-line bowl type water separating filter which I empty regularly as well as a normal little white in-line filter inside the cowling...
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    Product Report: Standard Horizon Fuel Flow Meter

    The product report on the NavMan fuel flow meter inspired me to write this.<br /><br />Just FYI - the Standard Horizon fuel flow meter is very similar, if not identical, to the Navman. The transducer/sender looks to be identical. The gauge itself is almost identical: large digital readout, two...
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    V4 vs. V6 lower unit compatiblilty

    A friend and I were talking yesterday. I have an early 80s V6 Johnson (175 hp). He has an early 80s V4 Evinrude (I think it's a 115). We both run aftermarket jets normally. I have a prop lower unit for my engine, he does not.<br /><br />We were wondering - other than the probable need for a...
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