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  1. Texasmark

    Switch 10x7 4 blade prop to a 3 blade

    I'm going to say that what's in front of your lower unit and the engine's depth at low speeds are areas for investigation. Disturbing oncoming water has an effect. Too high a load to be pushed and the prop being too high in pitch or too close to the surface are others. One thing that has...
  2. Texasmark

    Best way to gain a little speed with 40hp engine

    You make the deal, install the prop, take the boat out to clean water and get the numbers.....a 5 minute operation. Go back to the dock and remove the prop....talk to the dealer about your results and your expectations......that's how you do a loaner prop test.
  3. Texasmark

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

    Moving forward put more of the hull in the water. Reduction was caused by added friction with the water. Different types of boats usually have different hulls to support the functional design of the boat. Example is the Bass Boat with the "Pad" hull. The hull has a pretty good "dead rise"...
  4. Texasmark

    Convert 14ft aluminum closed bow to open

    Leave the deck be. Get rid of your transom TM and install a bow mounted one on top of it with foot control operated from that front seat. The difference in performance is night and day.....pulling a boat rather than trying to push it. Your 10 hp engine is a good match.
  5. Texasmark

    looking for service manual info for a 2006 verado fuel pump module

    Glad you have some help. Must be a large enough problem Mercury wide to warrant this attention.....I would think.
  6. Texasmark

    Spun hub or lower unit problem?

    I bought a 110 HP Mercruiser decades ago in an 18' Starcraft Holiday, 1965 model as I recall, well used.....er ah abused, and under power it would break loose. After a lot of head scratching since I was new to tearing into something with which I had absolutely no experience, I disassembled the...
  7. Texasmark

    2013 Merc 90 EFI leaking motor oil when tilted way up

    Any oil tanks of whatever kind under the cowling? On 2 strokes, that contain an oil tank under the cowl, if you fill it to the full mark and do what you said, unless you are lucky, even with a new cap and Oring gasket they will leak and make a big mess on the lower cowling in the front.
  8. Texasmark

    looking for service manual info for a 2006 verado fuel pump module

    Wish you luck. If its not in the service manual, don't expect any luck. A lot of components of different things are private to keep the competition from copying. External dimensions and performance specs don't tell the contents or design criteria so they aren't usually a problem. I found...
  9. Texasmark

    CLR salt removal experiment

    Nice job. I know that you are tickled.
  10. 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...
  11. 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...
  12. 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.
  13. 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...
  14. 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...
  15. 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...
  16. 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.
  17. 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...
  18. 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...
  19. 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.
  20. 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.
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