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  1. Texasmark

    does this look like it had power tilt and trim?

    Yes. back in the late 50's Mercury used "Lake X" in Florida for their "brutal" engine testing. Driving their engines over sandbars, logs, concrete bridge railings and such told them that they needed something to soften the impact of the spinning propeller, once airborne due to the LU hitting...
  2. Texasmark

    Spark plugs, Volvo numbers don't match

    I have become an "Iridium" fan. I almost have ALL my internal combustion engines converted down to and including lawn mowers and such. I do the cross via NGK online manual (Page 241 as I recall is for my Merc. outboards)...
  3. Texasmark

    Bass Boat Basics

    Get the cable and then build your console to fit, or build the console and order a new cable to fit. Having a cable too long is almost as bad as too short. On the exact distance OEMs use, it's what fits their layout. The idea is to get the operator up forward of the transom to aid in getting...
  4. Texasmark

    Coil spark strength

    Bored again this AM so lets try this: The energy that is consumed in the spark (voltage x current when the spark actually jumps the gap) obviously is produced/stored in the electrical system. In a conventional breaker points system, the coil (high voltage transformer) has primary winding...
  5. Texasmark

    Coil spark strength

    Nothing else to do this AM so I will post this: My experience with sparkplugs in a pressurized environment (internal combustion engine cylinder) is that a 0.030 gap will light off around 10kV. Old ignition system with coil and points, ran around 18kV unloaded STP...outside of the engine...
  6. Texasmark

    NEED Stern LIFT Prop Suggestions

    Lookin good! Wink!
  7. Texasmark

    Where should water come out if no tell tale?

    Thank you sir for making this a valid reply. My last low hp Merc was about 1974, a 2 stroke 7 ½. Been a lot of water under the bridge since then. In talking about it, I think it came without a trim tab too....engine too small to need one. Note to Chokeneck: In a barrell; a 55 gallon drum...
  8. Texasmark

    NEED Stern LIFT Prop Suggestions

    Speed is what forces the boat out of the water and on plane and finally on the pad. The boat weighs X pounds. The water pressure against the hull has to exert essentially that number of pounds in "pounds force"....an active dynamic for you to get on the pad. If you can't get enough speed to...
  9. Texasmark

    new prop for the new to me boat

    Wrong answer!!!!!!! I was moving around my open sites just now and in crossing the prop slip calculation window, I noticed a significant error. When I did the 5600 calculation, I didn't/forgot to change the pitch to 19. Once I did that the top speed moved out to 48 so you WILL get an increase...
  10. Texasmark

    new prop for the new to me boat

    4 blade will upset the apple cart. Tossing in that 4th blade not only adds a blade but changes the purpose of the prop as I just found out with the Solas SS 4 blade that I just bought. However, the changes it caused were what I wanted to happen and I am happy with it. My TP 3 blade and 4...
  11. Texasmark

    Mercury Remote Control Assembly

    The Mercury service manual for 3 and 4 cyl. 2 stroke 60-125 hp engines lists a schematic for that switch. The switch is open if the control is in any position other than N. The wire connected to the switch is yellow with red stripe and is power to the starter solenoid....closes the high...
  12. Texasmark

    Aluminum Transom vs Wood

    .....and an invitation for a law suit or worse if involved in an accident, plus a ticket if law enforcement is involved.....Powering over BIA certification limits can be costly. To answer your question, Transom braces would be the main thing. Course they have to be anchored to something besides...
  13. Texasmark

    Where should water come out if no tell tale?

    With the lower unit removed you aren't pumping water. The water pump is in the lower unit and must be submerged in a drum filled with water or connected to a water hose with an adapter referred to as "Muffs".....a pair of 3-4" rubber cubs, joined by a spring steel bar and containing a female...
  14. Texasmark

    ngk buhw-2 vs buhw spark plugs for 90hp merc?

    https://www.ngksparkplugs.co.za/wp-content/uploads/2019/01/NGK-Catalogue-2019.pdf Page 241 of the NGK catalog.
  15. Texasmark

    NEED Stern LIFT Prop Suggestions

    Agree on the pad and height could be part of the performance desired. Problem I have is recalling the rule of thumb from the big guns on here, especially a guy from Coral Gables, Fl. I think, with a 300 Johnson on a Donzi I think among other things: 1"up from even per 6 inches of setback...
  16. Texasmark

    2002 Mercury 90hp crankshaft torque settings

    Answered this elsewhere.
  17. Texasmark

    1989 Mercury 100 4cyl - Ignition Spark Issue (S/N: OB346208)

    To ensure that your problem is only electrical, squeeze the primer bulb when trying for WOT RPMs. If you get them new fuel pump kit and probably should do a new fuel filter and cut the old one to see if black or tan specks/chips are in it and if so change your fuel lines from the tank all the...
  18. Texasmark

    1997 Merc 75 to 2002 125 EXLPTO

    Question answer is Yes. The 8 pin connects to the Commander 2000 and 3000 remote controls to name a couple. The latest released version of the manual covering the 2 stroke 3 and 4 cylinder 60 Jet thru 125 was in late 1990's and covers 1994 and later engines. All engines have the same pin out...
  19. Texasmark

    ngk buhw-2 vs buhw spark plugs for 90hp merc?

    I don't remember when and on what engines Merc introduced their 40kV (unloaded) plug voltage. Would assume the difference may have occurred at that time.
  20. Texasmark

    NEED Stern LIFT Prop Suggestions

    Solace 4 blade SS. Just bought one and it does what it says it does. High quality and in the 13" version, was less than $275 free shipping for my 19P. It does a lot of ventilating at level trim angles just above plane making for high prop slip numbers. Tilt the engine all the way down and...
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