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  1. Sea Rider

    2002 Yamaha 70 2stroke bottom plug rusty

    Yep, in such case a new powerhead is mandatory along peace of mind... Happy Boating
  2. Sea Rider

    Reasons for broken teeth on the gear wheel

    There's a huge thrust loss difference running a motor at the extreme lugging side of the wot rpm range compared to running it at the higher end while pushing heavy boats with same motor. The issue is that everybody runs wrongly propped motors on heavy applications... Happy Boating
  3. Sea Rider

    Prop selection 1998 fishin barge

    Yep while that motor correctly propped pushes that barge at fast displacement speeds... Happy Boating
  4. Sea Rider

    Reasons for broken teeth on the gear wheel

    Is this the second occasion in which said gear component has been replaced ? If so was it a DIY work or at a Yam dealer facility ? Gear boxes have fine gear adjustments done with proper tools whether at the factory or at a dealer facility. Now a days parts metallurgy is made light in order to...
  5. Sea Rider

    Thermostat housing hole.

    If the seats are the original factory installed, all 3 should rest leveled against the bottom, just check them if so. Seems previous owner tried to remove some and ended rounding the heads. Forgot to mention that If you place the slow jet against a light source your eyes will pay you a visual...
  6. Sea Rider

    Thermostat housing hole.

    There's a tech associated issue running internal scratched jets or with widened small holes, if running so the jet will achieve an internal fuel disturbance along fuel/air ratio alteration which is nada bueno... Before bending the float's hinge must know if all 3 needle's seats rest at same...
  7. Sea Rider

    Avon Stern Light

    A 360 whether being a Sib or Rib powered with a 40 HP motor is way too much for that size inflatable. Be gentle with the throttle and move load up front as to avoid an up bow attitude for too long when trying to plane the combo. Contact Avon and ask them ...
  8. Sea Rider

    Thermostat housing hole.

    What usually do if finding the jets severely gunk/clogged is to soak them in paint thinner overnight, run a thin needle through both sides, or just squirt carb cleaner, but never ever poke any wire that doesn't count with a sharp point. Non pointy wires will end scratching the internal jet, but...
  9. Sea Rider

    tohatsu 9.8 corrosion on vertical shaft (new thread)

    Been there, had no idea how much corrosion had already formed there before removing the complete steering shaft from the swivel bracket assy. To access it will need to remove lots of parts, it's a time demanding job. The steering shaft cost it's around S 190 bucks including local shipping to...
  10. Sea Rider

    Thermostat housing hole.

    How did you cleaned the other (2) slow jets, are all (3) 60 gauge ? Slow jets have tiny diam fuel passages which narrows around the middle, a toothpick is too thick, better poke the narrowest metal needle you can find through both extremes, when finished squirt carb cleaner with the provided...
  11. Sea Rider

    Thermostat housing hole.

    Never had same issue with a leaking carb after the seat was micro polished to new condition along new bowl gasket install. If the needle/seat closes fine while blowing air through the carb intake, expect the same when priming the fuel bulb till firm. Hope the removal of the screwed jet at the...
  12. Sea Rider

    Thermostat housing hole.

    Check your inbox for a PM....
  13. Sea Rider

    Considering an inflatable/RIB for diving

    A 15 footer Rib will work well in the N. Pacific, just check if best suited for 4 divers + diving gear as to to count with a confy deck space and nice water ride. If will be diving with same 4 divers can get together and buy a 17 footer powered with a 40 HP and divide the cost among all 4 ...
  14. Sea Rider

    Thermostat housing hole.

    Both 1-2 seats must have been really dirty, huge gunk accumulation on top for floats now to sit bit downward. If the tech said to go for a 125 jet must know his business well to end running 115-125-115 jets in that order when the carbs are installed back. You can screw a jet head if severely...
  15. Sea Rider

    Considering an inflatable/RIB for diving

    Other much cheaper and affordable alternative could be this Saturn 18 footer alum sectional floor rescue Sib powered with a 30-40 HP short shaft motor depnding on how far need to go diving and if wanting to arrive there faster that with a 30 HP...
  16. Sea Rider

    1983 70 HP Carb issue

    Welcome to Iboats, Did you cleaned well the needle's seat while soaking the upper carb in a cleaning solution or by squirting Carb Cleaner Spray through the seat. What's the needle tip cond, is it still sharp pointy, not rounded ? Is the float a hinged or fixed one ? Happy Boating
  17. Sea Rider

    Thermostat housing hole.

    The float on carb one looks fine to me. The middle carb used to work with 3 different jet numbers which were : 115-120-125 while the slow jet remained 60 numbered on all 3 carbs. Is 115 the jet number stamped on 1-3 ? On many 3 carbed motors have seen one jet having a smaller or higher jet...
  18. Sea Rider

    Outboard motor test tachometer

    Thanks, but I like having a permanent installed hour/tach to visually check rpm operation throughout the throttle range, the smartphone tech is useless for my needs. Let the OP decide which of both mentioned tach methods will suit best his current need. Happy Boating
  19. Sea Rider

    Outboard motor test tachometer

    With removed cowl, good to check/adjust idle rpm at neutral, would like to see a smartphone measuring high rpm on the flywheel at wot. Happy Boating
  20. Sea Rider

    Thermostat housing hole.

    When all 3 seats have been micro polished to mint cond check if all floats rests slight under or not which won't be an issue as long the needle's tip and seat are doing their homework right. Check that all seats rests fully down against carb body ? On non hinged carb floats, the height will be...
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