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  1. Texasmark

    1996 Mercury 25hp shortshaft lower unit replacement

    The problem is in the pinion gear in the LU that drives the rear of F and R gears. That relationship has to be set to a specified gap (shims) and that takes a special tool..per the book. Course you could get a prop shaft and water pump impeller, and new seals for the top of the shaft and prop...
  2. Texasmark

    20hp mariner after service, speek still 13 to 14km/h

    That's not even on plane. What did he do? Explain more about the carb. swapping you mentioned? Did he get it running satisfactorily in the shop? Numerous things could cause your problem and you'd have to supply some spec numbers and some things you checked and answers to aid in helping you.
  3. Texasmark

    2003 Mercury 25 HP won’t crank

    Check your battery terminal voltage when somebody turns the key to START. If less than 10 volts, get a charge on that battery or a new one if it is sulphated up and won't carry the 100 amps required to start your engine with a decent terminal voltage. Wally world had load testers in the...
  4. Texasmark

    1997 trophy 1903 120hp force

    Sounds good to me. You can "diddle" around and spend endless bucks and time playing with combinations, or just be happy with what you have. Looks like it's working for you and let it be.
  5. Texasmark

    Can I use a Yamaha 115 2-stroke prop on a Suzuki DF140?

    You might go to a Yammie dealer and get your answers. Spline count has to be the same. Prop thurst is against a tapered (usually for centering purposes) flat washer fairly thick. Then the prop. Then may be a flat washer or some kind of prop nut retaining mechanism...some engines use a cotter...
  6. Texasmark

    primer bulb

    How old is/where did you get your gas?
  7. Texasmark

    High Idle (2900rpm) - 1988 l6 115hp Mercury

    Get some 50:1 premix in your gas, circulated through your engine prior to doing that.
  8. Texasmark

    2002 Merc 90hp 2 stroke won't idle after winter storage.

    The dose of Sea Foam sounds like a quick and dirty, inexpensive potential solution. Just give it time to soak in before you make any decisions...like do a "decarb" explained here in archives or www it. Do it one day and wait a day or two and run with 2 oz per gallon for a couple of hours at...
  9. Texasmark

    Yamaha VF115 SHO prop quote

    The 4 blade got me off the limiter so the 3 blade must have been right there.
  10. Texasmark

    Prop Blade/Pitch/RPM

    According to go fast prop slip calculator if your 115 is like most witha 2:1 gearbox...prop turns half the speed of the crankshaft, your slip...the difference turning in water vs a screw turning in wood is: 19 = -4; 21 = 0 (the screw "is" turning in wood; 23 = -4 also. Common denominator here is...
  11. Texasmark

    Replacement prop

    I will add an additional comment to what I posted previously. A ported prop like the Laser II can function as both simultaneously.The ports allow the engine to unload at slow speeds, making for a great hole shot with a high pitched prop tuned for the top end, yet at the high end they close off...
  12. Texasmark

    1968 Fiberform 16 foot with Homelite 55

    Absolutely an incredible find and to hear that it fired right up and all the nice pictures to validate your comments. Back in the 1965-68 time line a friend of mine bought one on a 15' fiberglass boat. Went fishing with him one time and he let me drive it.....super fine engine. I think I...
  13. Texasmark

    Yamaha VF115 SHO prop quote

    Go to the top of the page and under parts go to props and fill in the blanks and a list of applicable props will show up. I ran your posted RPM numbers assumning the F gearboxes are equal to 2 strokers in that hp range....but just speculation...... and you have something tangled up...
  14. Texasmark

    Prop Blade/Pitch/RPM

    Back in 1972 I bought a new Johnson 125, power tilt only...trim came out in 1973, on an 18' Caravelle FG bow rider, tri-hull.....heavy boat with probably 15* of dead rise at the transom. I had a 17P OMC SST prop...their first SS prop, Teflon coated, the second year (1973) as they came out that...
  15. Texasmark

    Yamaha Trim Tilt Constant Ground?

    If like others the relay has to be DPDT, 2 are required and they are complementary wired....you have to activate/deactivate both to get power applied to the motor and depending on whether the blue or green wire has the relay energizing current, will determine which pins on which relay are...
  16. Texasmark

    Forward and reverse help!

    Define "both hooked up". What's unhooked...HV lead off the spark plug? Does RPM have anything to do with the problem? If it works at low RPMs and not at high then I could support the dirty terminal (either supply) theory, but some modules get their ground through the mounting screws. Some...
  17. Texasmark

    Mariner 90hp 3 cylinder 2004 - Bogging Driving Me Crazy

    I usually try to isolate it to fuel or fire when it acts up. Fuel is a squirt of Sea Foam into the venturis of the carbs checking for a response or not. Fire is checking to see that the plugs are firing, like running with the cowl off and a timing light attached to each (in series) spark plug...
  18. Texasmark

    1998 Mercury 225 slipping at high speeds

    I have no experience with 200 HP engines but I have run the "Pad" and have experienced "Chine Walking" from exceeding the boat and setup parameters speed limit, also "Blow out" from too much trim, and "Ventilation and then the prop grabbing" caused by air induced ahead of the prop, like a keel...
  19. Texasmark

    1994 90 HP Mariner/Tracker Surges and bogs on plane/WOT

    On clamps or no clamps, Mercury uses a spacial tie wrap that has a curve in the inside of the female part allowing for 360* compression of fuel lines. If you are talking about lines preceeding the fuel pump, it could matter and no visible fuel leakage around the hoses. If down stream of the...
  20. Texasmark

    1998 Mercury 225 slipping at high speeds

    What "rubber" washer at the prop? If a pressed in rubber hub it encompasses thewhole space between the splined brass center and the "shell"....no washers in the prop area. could be slipping but not not with the indications you mention. You didn't mention if you could correct the problem...
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