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  1. Sea Rider

    Prop or something else??

    When on plane with deck load evenly distributed at which lower leg height is the water flow passing by, under the small upper plate or above the AV plate ? For that will need to pull your head side of motor to have a look... Happy Boating
  2. Sea Rider

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

    Have 2 issues going on with a Tohatsu 9.8 & 30 HP motors, pan gasket have 2 deterioration stages (1) Spills water onto the pan (2) motor runs like crap at wot with cowl ON, when removed runs strong as a champ independently of the water leaking onto the pan. Pan gaskets are relatively cheap...
  3. Sea Rider

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

    Seen same issue on other motors, the explanation is quite simple : the lower crankcase's gasket is shot, when the motor runs at higher revs, cooling water floods the pan, 100% of the exhaust smoke that should exit right through the exhaust tube, middle leg and prop is leaking around the pan...
  4. Sea Rider

    Lund 14 DX and Merc 25 sluggish

    To know : What's the total weight of the boating package : Boat, + Merc 25, + 2 Souls on board,+ Fishing Gear ? Is it 1600 lbs (727 Kg) * What's the Max HP and Passenger factory rated for the LuLund 14 WC DX ? What's the min-max wot rpm range factory stated for the Merc 25 BF, is it a center...
  5. Sea Rider

    Lund 14 DX and Merc 25 sluggish

    Is the Crestliner boat being powered with a 2 or 4 stroke 30 HP Tohatsu motor ? I run a 2 stroke Tohatsu 30 HP on a 14 footer inflatable Sib, with 2 up and a spot on transom/motor height and neutral trim was only achieving 5000 wot revs on flat calm water cond with a factory delivered 3 blade...
  6. Sea Rider

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    Yep, about being a 9.9 which in reality it's a 10 HP motor, just playing with the numbers to meet lake restrictions. Anyway a perfectly modified 15 HP should achieve more revs and slight more top end speed than a 9.9 while carrying more load, if propped towards its max wot rpm the better...
  7. Sea Rider

    What type of bench seat do I need?

    Thinking it over, you could fabricate something simple to hook to the existing side patches bolted with a flat head bolt.... Happy Boating
  8. Sea Rider

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    How would you dyno the motor ? To validate that simple and cheap conversion will need someone to chime in and post pics/measurements of both 9.9 and 15 HP reed valve assys and check their physical differences, one who have actually done the conversion including both motors water wot tests rpm...
  9. Sea Rider

    Lund 14 DX and Merc 25 sluggish

    Welcome to IBoats, As a starter need to know the min-max wot rpm range for that motor factory stated to know how much under its max wot rpm the motor is currently revving at. Prop pitch, motor height, trim, load distribution, number of passengers also accounts for a bad water performance with...
  10. Sea Rider

    Wayyyy over propped???

    Is it a new boat out of the store/dealer propped with a 19 pitch, or it's a second hand one which previous owner had propped it that way ? Happy Boating
  11. Sea Rider

    What type of bench seat do I need?

    You're welcome, Those brackets must be removed heating them up while a flat screwdriver makes its way inside the glued patch starting any side. This procedure must be done by a skilled techie, repair shop or can blister the fabric badly under the patch if done incorrectly. These added...
  12. Sea Rider

    Drilling through aluminum floors ?

    Not all alum floorboards are build the same, some thicker, some thinner so won't hold the same load, can drill small holes right on center of the alum panel that will hold the pedestal's flat metal bracket with thick screws screwed onto the alum floor, not that large as to pass to the other...
  13. Sea Rider

    Drilling through aluminum floors ?

    Do you plan to install pedestal seats or any other comfy sitting accesory ? Happy Boating
  14. Sea Rider

    What type of bench seat do I need?

    Welcome to IBoats, Check with WM customer service if have seats for that dinghy model, first time seeing such bench brackets. If NLA will need to remove both brackets, buy and glue 2 bench side patches and a stransversal seat.... Happy Boating
  15. Sea Rider

    New prop recommendation

    What's the min-max wot rpm range factory stated for that motor ? need to dial a 4 blade prop that will rev towards its max wot rpm range with 4 adults on board, when with 2 just throttle less not to over rev. Once there can throttle at your preferred cruising speed... Happy Boating
  16. Sea Rider

    Mechanics opinion needed on a 90HP Merc Four Stroke

    Those must be inside wired, not carbon wired, if both end connectors are in good shape just replace with new car cable with same diam and lenght... Happy Boating
  17. Sea Rider

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    If you check both parts there, clik on each 9.9 and 15 HP parts and will open a posted pic which are identical. Probabbly the reeds on the 15 are bit hardened, thicker, the ports and reeds are bit wider whatever ? To check the power increase will need to tach and GPS the standard 9.9 and...
  18. Sea Rider

    Throttle and Timing Advance

    With some motors while Off you must be geared forward for the timing advance and carb synch to open/work fully when applying max throttle, don't know if that's the case with such motor ? Happy Boating
  19. Sea Rider

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    A 2 stroke 9.9 HP motor when upgraded to a 15 HP one usually needs more time advance as will work with more fuel intake, check with the Yams's Service Manual if need to perform a new carb/time advance synch or not ? Happy Boating
  20. Sea Rider

    1999 yamaha 2 stroke 9.9 to 15hp conversion

    What's the current 2 stroke model, 9.9 what ? Happy Boating
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