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  1. Sea Rider

    2020 25hp Tohatsu dealer says....not!

    Last but not least, as a water experiment, lets say that's a healthy 25 HP Manual trim motor, so trim it to 90 deg, go full throttle, once the boat is on plane running parallel to the water level visually check by pulling head side of motor at which lower leg's plates is the unobstructed...
  2. Sea Rider

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    With 600 tached idle revs it's a clear indication that tach is way off, no wonder why reads just 3000 rpm which it's half of the max wot rpm range. If the tach is adjusted to 3 cylinder 2 spark per revolution, check if can be adjusted to 3 cylinder, 1 spark per revolution and if the display...
  3. Sea Rider

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    Never have decarboned a 3 cylinder motor to tell if the cylinder been squired with CRC will make the motor to rev bit erratically. On 2 stroke 2 cylinder motors need to wait a bit for the dense smoke to clear up before going for the second squirt or motor will die when at idle/neutral. Usually...
  4. Sea Rider

    2020 25hp Tohatsu dealer says....not!

    A pity that said motor was not tached right out of the box as to know what wot rpm was achieving with 2 up compared to current 5200 rpm as to rule out if it's entirely a motor issue or not. Has the trim, deck load distribution and motor height on transom been altered after the motor was...
  5. Sea Rider

    Carb leaking fuel from hole (fairly large run of fuel)

    When the fuel circuit tank to fuel pump is cleaned to impeccable condition, would be desirable to micropolish each carb needle's seat to a shinny clean condition. Roll a cotton portion at the pointy extreme of a sushi wooden stick, dampen with water, apply toothpaste and roll the stick in 360...
  6. Sea Rider

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    Was the CRC squirted through the carb's air silencer side or you previously drilled 3 small orifices at the upper air silencer with said orifices pointing at the center of each carb's throat ? If the orifices were drilled as suggested at idle/neutral press the can's valve for 1-2 seconds at each...
  7. Sea Rider

    2020 25hp Tohatsu dealer says....not!

    With the motor achieving at best just 5200 at wot it's 800 revs from max 6 K factory stated, Need to prop that motor right, a 10 pitch is too much for that combo, check if can get an OEM 8.5 or 8.0 / 3 blade alum prop, will make the difference if it's just a prop issue and the motor is 100...
  8. Sea Rider

    Miss marked prop?

    Wow, you blow my mind way further each time you reply to my posts. Guess what ? this post is all about an underpowered 9.8 OB with a 3 blade standard prop powering a large alum open boat, has nothing to do with running large racing hulls powered with large HP motors propped with clever type...
  9. Sea Rider

    2020 25hp Tohatsu dealer says....not!

    Check if the small tach you plan to test has programmable spark firing sequence, if not the tach will surely read anything. Yep, a gunked hull accounts for an awful water performance. Would be good to find out which testing procedure did the dealer used to say the motor runs OK. Should have...
  10. Sea Rider

    1996 Suzuki DT65. SEIZED!

    If having carb fuel spills will likely be accounted to any of the following issues : -Needle's tip is rounded, worn out, not pointy. -Float's height out of proper adjustment. -Needle's seat extremy gunked, not letting the needle to close/shut well. -A combo of all 3 ? Would recommend to...
  11. Sea Rider

    2020 25hp Tohatsu dealer says....not!

    Some issues : How do you know said motor with a 10 pitch prop ran right below the max wot rpm range which is 6 K. Have never seen an OEM prop over revving way over max rpm range, not even powering light alum open boats much lighter than yours at full throttle. If you have not checked the max...
  12. Sea Rider

    Synthetic gear case oil

    As those marine grade gear oils are hard to find locally, been using standard automotive multigrade 80-90 gear oils since 1996 which were periodically changed after max 100 clocked hours with 0 issues whatsoever. Just be sure the gear case has 0 water intrusion... Happy Boating
  13. Sea Rider

    Recommended PSI

    Inflating to firm thumb pressure it's relative, with just 2.0 PSi inflation will achieve that condition. Need to order a good manual pressure gauge and compare its reading versus any other air pump used to check if nearly matches or readings are way apart from each other. Once the Sib has been...
  14. Sea Rider

    Airhead Boats

    An Intex type inflatable would be the way to go, a traditional air floor sib will still be too heavy to be carried as mentioned.... Happy Boating
  15. Sea Rider

    tell tale

    If having poor water pressure on the muffs and muffs losing too much water at sides expect to achieve that condition. Happy Boating
  16. Sea Rider

    Tohatsu 9.9 d2 ignition timing

    With motor trimmed to 90 deg with said 18 HP, does the water flow skims right under the upper small plate as seen in previous post 17 ? If so, check if possible to install the 8.5 15 HP prop to bump wot revs bit higher. Should see + 200-300 wot revs increase with + 0.5 pitch. Don't know if will...
  17. Sea Rider

    2020 25hp Tohatsu dealer says....not!

    Yep, if the motor revs strong throughout the whole throttle range check if having a hub on its way to become fully spun or already shot. Was the motor delivered with a 10 pitch prop ? if so it's a medium pitch one not suited for heavier applications as yours. Will need to install an induction...
  18. Sea Rider

    Miss marked prop?

    Was not going to respond to your last post, what the heck, lets have some fun keeping live the tech quarrel. What posted is pure BS 6 o'ckock tea time on line writting which only works on dry theoretical basis, not on real wet water world practice as many boaters have experienced. The issue...
  19. Sea Rider

    2000 Tohatsu 5hp — design & reliability comparison?

    Those small portables doesn't count with lower leg's double water intakes as found in larger HP models, just a small water strainer right under the AV plate, so will need to be fluhed ON with fresh water in a large bucket soon after returning to terra firme or... order a flush adapter code #...
  20. Sea Rider

    Hull hole where airfloor board pushes on hull

    Air floor Sibs are not the way to go, needs constant re-inflation to achieve a solid deck especially in cold days boating. The only plus is the faster assembly time compared to alum floors Sibs if plan assembling, disassembling them constantly for storage. I've seen new Sibs come appart after...
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