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  1. Texasmark

    Prop, or Engine Issue?

    I was in high school in the mid-late '50'a and we had a "vocational "wing" on the campus. Taught all the things that you could do locally to earn a living if you didn't go to college....which weren't available like they are today, Jr. College in particular....big loss for us back then. My...
  2. Texasmark

    Prop, or Engine Issue?

    "Simply amazing that folks own these motors .---Know nothing about them or do not care to learn.-----Just turn the key and roar away from the dock." Yepper that was me!!! Back in those days I didn't have access to "forms.iboats.com and was "admitmittedly" stupid. Don't know how I overhauled...
  3. Texasmark

    Prop, or Engine Issue?

    Maybe mine was an earlier model.....It was a 70 horse loop charged Rude triple.....been a long time and I bought it used.
  4. Texasmark

    12' Aluminum V-Hull - Issues porpoising and planing

    Besides moving things forward, including your position if possible....I doubt it on a 12' V hull, adjust the "trim" position of the lower unit with respect to the transom via the tilt bracket slots on the engine. Proper trim can solve a lot of sins. I ran a Merc. 7.5 on a 10' Lowe Lake John...
  5. Texasmark

    Prop, or Engine Issue?

    If you buy it put in a new impeller/water pump and a new thermostat. That engine doesn't have an over temp alarm. I had one that I bought from a friend and in short, the thermostat stuck shut at WOT and the engine locked up. Had to have the block bored and I installed oversized block...
  6. Texasmark

    Older Boats

    Decades ago, I thought I wanted a popular open FG boat (front deck, dash, cable steering, board seat fitting 2 folks with back, with a 75 HP 4 cylinder Johnson. I took it for a test drive and the water test revealed that the deck (floor) and the hull were no longer intact and you could watch...
  7. Texasmark

    Power trim not working just clicks.

    Once you get through the PTT problem, you might consider a prop repair or replacement......considering what I see in the picture.
  8. Texasmark

    Where to put fuel and battery (weight distribution on RIB)

    That's only a 50 horse engine. Your operating envelope is probably 0 to 25, maybe 30 MPH. Since you have a "helm", you can stand more weight aft than you would want with a "tiller" control system. Rule of thumb for me, with any boat, is play with everything you can touch and stop when you...
  9. Texasmark

    Two stroke oil leaking into fuel hose, 30hp 1993

    TCW-3 (Two Cycle Watercraft-3rd iteration) oil is deliberately dyed blue so that you can tell in a glance that you have added your oil on both pre-mix and oil injection engines. Lawnmower/small engine non marine oil isn't the same formula as marine oil is made for constant full throttle...
  10. Texasmark

    Engine wont Start

    Don't mean to be a pessimist, but the last time I checked Mercury advertised a 40kV ignition system and that was without a plug (load) connected. I'll agree that 40kv can stand quite a bit of attenuation before it can't jump an 18kv plug gap.
  11. Texasmark

    2nd battery needed if installing prawn puller??

    Where's the sensor, especially the current sensor? You have to have something, usually wrapped around the cable that converts amperes to volts....sometimes a series shunt is used for that purpose but you don't want a shunt in a starting circuit.....adds resistance, however small.
  12. Texasmark

    Engine wont Start

    "A '73 Merc 850 should be battery-powered CDI ignition. It should have hot spark........." Well Chris, where does it get that "hot spark" if not from a good, well charged battery, and proper cabling capable of delivering the necessary voltage during the cranking load on the 12v system.
  13. Texasmark

    Engine wont Start

    How hot is your battery and how good are the connections. You need at least 10V across the starter contact to starter metal housing (or ground lug if starter has one, for the starter to spin the engine at 200+ RPM to get enough spark amplitude to ignite the spark plugs. This should show up in...
  14. Texasmark

    Lanyard to disable engine when operator leaves the helm

    My experience with large waves is to not take them head-on. 45* and slow speed to maintain steerage, has been my solution. On some, where it seems appropriate, if your boat has a wide beam for lateral support, I have run in the trough and slowly moved up over the crest till I was out of the...
  15. Texasmark

    CHARGING QUESTION

    The rectifier module may not contain a regulator. Without a regulator, 16V is a common output at higher RPMs. With a regulator it will stop at 14.5V. I haven't checked on this, but a red stator is used with a 16 amp regulator on regulated power sources (like my 2002 90 and 115 have) whereby...
  16. Texasmark

    Prop size and pitch

    Hull to water contact is a big player in boat speed.....if you have power trim and tilt, just get up on plane, tuck the trim in to the point that steering gets to be heavy. Record your speed/RPMs. Trim out till the boat wants to porpoise and make the check again. Proof's in the pudding as the...
  17. Texasmark

    Lanyard to disable engine when operator leaves the helm

    That's why most lower units have an overrun clutch in F gear. Otherwise every time you chop the throttle you are subject to having your teeth embedded in the windshield.
  18. Texasmark

    Replacement Battery for Mercury Bigfoot 60hp

    200 cca is plenty for that engine. Question is what else is on the battery and when was the last time you charged it......they do self discharge so the day before you go on an outing, get out your voltmeter and read the battery voltage....if not above 12.6 put it on the charger overnight.....an...
  19. Texasmark

    Prop size and pitch

    I had a 1988 115 tower on the same length, pad hull, Ranger BB and a 19P original Laser would get that boat up on the pad and at 6000 RPM ran 50 MPH at max trim. Something is definitely wrong with the engine.
  20. Texasmark

    Water/Fuel filter

    I don't know the brand off hand now. It appeared to be a quality unit with a glass container for catching water and viewing, quite large, maybe a quart size. I had put a fuel pump kit in the engine not too long before I added the filter, so I didn't expect that to be a problem.
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