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  1. Sea Rider

    2 Stroke Oils vs TC-W3 Oils

    Yesterday went sailing on a 30 footer sailboat which has a 15L HP kicker. Owner is currently using Husqvarna High RPM motorcycle oil at 50:1 mix. Told it was not a TC-W3 certified OB oil, being intended for air cooled motorcycle engines, could have further tech issues with his engine... The...
  2. Sea Rider

    Needle Valve Issue

    Need to fix the internal valve seat, an idiotic pseudo mechanic lightly scratched it trying to clean it out while poking it with something metal, needle which is brand new doesn't rest 100% properly on seat and there's a sligh carb fuel loss. It's mission impossible ordering a new one, would...
  3. Sea Rider

    Which One..

    As sunshine is already timidly peeking out, couldn't resist the temptation, will go straight for the 450 Rib, it's already here, it takes minimum 3.5 months to build and ship the 420 Alum Rib down here. Besides the 450 has 50 diam tubes compared to 45 diam for the 420, and 43 diam for my actual...
  4. Sea Rider

    First boat- Small aluminum with motor from a pontoon- Where to start with prop?

    Unless you have a trained ear tuned to hear 5-6 K rpm at wot, the consensus is that will need to install an induction tach to know max achieved wot rpm. When boat is on plane, prop shaft, Av plate must ride parallel along boat to water level, so it's useless to play with trim angle and vary...
  5. Sea Rider

    Which One..

    The adjustable seat does not reach aft as to drive sitting there, the hull is wide and if sitting starbord on rear tube my arm will be far away from tiller, that's why a transversal seat is needed at least aft. Can modify the ribs to my particular taste, that's the bonus to work direct with a...
  6. Sea Rider

    Which One..

    Which one would you go for and why, money is not an issue : Sea Rider 420 Alum hull rib, 45 diam tubes, Light weight 90 KG with bow locker. One solded hull & deck piece, for sheltered & overall coastal waters use, for long shaft max 50 HP engine. Sea Rider 450 Fiberglass hull riib, 50...
  7. Sea Rider

    Gear Ratio Relationship

    Scenario : 2 strokes 50 HP, one with 1.92 gear ratio, the other with 1.85. Both weights same and runs wot at 5850 rpm with same standard factory delivered prop.. if seated on a bare empty combo (300 Kg boat and engine) What will be the pro and con about going for the one in which the only...
  8. Sea Rider

    Tohatsu 50 HP

    Was about to order a new 14 footer alum rib, but factory now wants 06-MOQ for that model which is insane at this moment, recession worldwide issues, so about to tell them hasta la vista baby. Have a new boxed 450 rib, the one that refused some years back, it's transom rated for max L 50 HP, my...
  9. Sea Rider

    Hydrofoil stabilizer two engines not space

    Twin engine installation must have a minimum transom space between both engines. Each OB brands states its parameters and may differ between OB brands. If engines sits at the sweet transom height spot no need to install doel fins, it's just a matter of correct engine/transom height, well...
  10. Sea Rider

    Honda BF20 short shaft doesn't fit a 15" transom

    So you want to upgrade to a new boat with same current engine without messing with the transom height, right ? If so, you`ll be extremely lucky to make a sweet engine/transom match. What`s stated on my post regarding Honda, is plain theory extracted from Honda Owner's Manuals. Not always works...
  11. Sea Rider

    Nissan 9.8 long shaft to short shaft change over

    A Nissan/Tohatsu 9.8 is a clamp type OB, Other option is to make/buy a 5 inch transom mount. Screw it to transom and sit engine there. If eldery boater likes to cruise at fast displacement speeds not an issue using a long shaft on a short shaft transom. BTW which type, lenght boat and max HP is...
  12. Sea Rider

    Power Tuner

    After 200 metered worked hours my beloved 2 strokes Tohatsu 18 HP was running quite good throughout the whole throttle range. but not that smooth at idle, bought a can of CRC Power Tuner carbon remover, sprayed 1/3 through carb throat at intervals varying engine rpm whie on muffs. Smoked worst...
  13. Sea Rider

    2 St.Tohatsu 70 HP.-

    Paul, for engines that has automatic oil pumps. Is it possible to use 25:1 fuel oil ratio mixed just on tank and leave engine's oil reservoir completely empty untill break in period has finished ? Could there be a oil pump damage of some kind by not filling it ? Owner's Manual states 25:1 ratio...
  14. Sea Rider

    raising my motor.

    The fastest way would be to install a transom mount, usually are 5 inches, unless custom built. Something like this, don't ask me who sells them. Will need to drill some holes to secure mount against transom. Check with friend if he will have an isssue about it. Happy Boating
  15. Sea Rider

    A Insane OB Purchase

    Couldn't refuse, an opportunity in a life time. 2 strokes tiller brand new boxed outboards 10 Tohatsu 18 HP L Shaft 06 Tohatsu Everun 50 HP L Shaft 04 Tohatsu 70 HP L Shaft All for $ 24 G, a local customs special auction. Anyone want's one ? Happy Boating
  16. Sea Rider

    Opt Engine Transom Height.-

    (4) Trim setting : If you vary trim angle from ideal 90°, you will experience best prop thrust loss due to varying prop’s angle of attack, achieve unwanted drag resistance on AV plate as per example. Bear in mind that water is 100 times denser than air, salt water even more. More acceleration...
  17. Sea Rider

    Opt Engine Transom Height.-

    3-As no engine manufacturer has provided a precise clue at which LU height must water flow pass at speed for least LU drag and best combo water performance will agree with Yamaha ‚statement, moons back under trial and error have dialed my sweet engine/transom height spot to be located between...
  18. Sea Rider

    Opt Engine Transom Height.-

    2-Have learned from many initial setup experiences that on real sib boating world will depend entirely on hull shape, transom height & chosen engine brand. Strangely none of them mentions at which LU height must water flow (WF) should pass when engine is in operation, for what concern us all...
  19. Sea Rider

    Opt Engine Transom Height.-

    Been doing a exhaustive research on several engine owner brands printed manuals regarding a forum myth near cast on stone and word of mouth recommendation passed from boater to boater through the years that states that all brands AV plates must be even or slight under keel. The research found...
  20. Sea Rider

    Honda BF9.9 cooling water flow problem

    Tom, Does Honda gives any indication on Owner's Manual regarding that you need to tape lower water screens so as to lose best water pressure when using the adapter ? On some engine brands must do so. Check. If going for muffs, could make this simple adaptation, muffs will hold much better onto...
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