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  1. Sea Rider

    Thermostat housing hole.

    For clarification post a pic to check that out. Does the adjustments mentions anything ? Must be posted in the Service Manual for sure. Happy Boating
  2. Sea Rider

    Thermostat housing hole.

    That I know CDI's are solid state non adjustable electronic devices.. Has nothing to do with carbs, are married to the exciter and ignition coils as well. At 90 trim setting, spot on motor/transom height matched, well propped to run towards max wot rpm, the combo will literally jump on plane...
  3. Sea Rider

    fuel trouble

    Welcome to Iboats, The motor seems to have the float's needle valve in bad shape or probably too much gunk built already there. The needle doesn't close properly against the seat and spills fuel out the upper carb. Happy Boating
  4. Sea Rider

    Strange Motor Behaviour.-

    Thank's, have tested the motor on land with analog and digital meters along DVA volts readings on the entire electrical components, all were found inside their factory parameters stated on the Service Manual. Don't imagine myself running a tiller motor at speed with removed cowl and hocked...
  5. Sea Rider

    Thermostat housing hole.

    That tach as installed seems is reading 1/2 rpm of the true rpm the motor is achieving. Aside setting the unit for 1 or 2 sparks per revolution need to set the tach to 3 cylinder as well. Have you tried running the motor with trim set to 90º ? The idea is to run it that way and if the motor...
  6. Sea Rider

    Strange Motor Behaviour.-

    And the culprit (drumroll) wasn't the Ignition Coil, with a new one installed the br, b, br has lessened a bit more and the motor has gained + 100 wot rpm than last water test. But after a long wot run when throttling to neutral/idle will start doing immediately same. Will install a new CDI in...
  7. Sea Rider

    Thermostat housing hole.

    I guess that motor has had enough being run too much on muffs. Check if the new spark plugs have been darkened/fouled too much on muffs. Run it on the lake after being fully warmed up at different throttle settings . By "silencer on" you mean the top cowl or the carb's tall air silencer ? All...
  8. Sea Rider

    Suzuki df15 impeller housing cap

    Welcome to Iboats, Water pump's caps (liners) are usually pressed in inside the housing, no adhesive required unless factory stated ? Happy Boating
  9. Sea Rider

    Strange Motor Behaviour.-

    That's the worst slow testing procedure going for when you already count with all the electrical components to swap and test. Nope this M30A4 doesn't use a Pulser Coil. A CDI is the last component that would like to find shot, it's a real expensive component compared to a way cheaper Ignition...
  10. Sea Rider

    Thermostat housing hole.

    A fresh water motor due to constant On/Off cycles will build up scale along water particles adherences on the entire water passages but less worse than salt water motors. Vinegar which is at the most only 5% pure won't do a thing if the motor has highly reduced diam water passages. don't worry...
  11. Sea Rider

    Strange Motor Behaviour.-

    Being this 30 HP a sinle carbed motor with a dual ignition coil you can connect an induction tach at any of both spark plug's cables, both will read the same wot rpm, sorry you're late, gun powder has been already discovered. If the tachs were way off moons back would have blown my Club's...
  12. Sea Rider

    Tohatsu 2 stroke 4hp conversion to 5 hp

    For a correct 4HP to a 5HP upgrade need to swap the 4 HP carb for a 5 HP carb, right after can go for one less pitch prop to pull wot revs up specially if pushing a larger or heavier boat. Happy Boating
  13. Sea Rider

    RPMs too high?

    Can't posibly compare a car to an outboard motor. A car is cooled by means of a radiator and the green krypto stuff, the OB on pure fresh or salt water which will achieve a spot on cooling provided that their entire water passages are immaculate clean. In a near future when all OB's use the...
  14. Sea Rider

    Thermostat housing hole.

    I flush many Yam/Tohatsu large HP motor with posted ear muffs with 0 issues at all, don't need to flush them in a barrell to compensate back pressure. All these motors have had their exhaust covers, cylinder heads removed and all their water passages mechanically desalted and decarboned to...
  15. Sea Rider

    2006 Yamaha 50 HP 4 stroke

    Will add, before starting the motor up, remove all spark plugs, trim motor to sit fully horizontal and squirt a small dosis of say 100:1 fuel/ 2 stroke oil, fogging oil, whatever lubricates well on each cylinder and rotate the motor for some seconds. You don't want to start any motor with dry...
  16. Sea Rider

    Thermostat housing hole.

    Some issues : A motor in good shape should not overheat whatsoever when running on muffs provided that there's a good water flow going out the hose. Does same when running on a barrel ? At which portion of the powerhead did you aimed the gun to read 230 F ? What's the water pump condition, is...
  17. Sea Rider

    RPMs too high?

    Counting now a days with better boating information, better prop selection than before it's a must tach current motor and check if runs inside its min-max wot rpm range factory stated. It's a day/night fun expience boating with a motor correctly proped for given load to run towards its max wot...
  18. Sea Rider

    Strange Motor Behaviour.-

    Who said liked running that way ? It's not only a Huge mistake, it's Insane to run any motor at wot at neutral without load. A 2 stroke 2 cylinder Tohatsu motor will not run even nor sound happily when running at full throttle on just one cylinder. Such scenario will match a 3 cylinder motor...
  19. Sea Rider

    Thermostat housing hole.

    Since modified my ear muffs have minimum water loss along staying tight grabbed onto the lower leg. Prior water testing the combo, set trim to 90 deg for motor to sit fully vertical on transom, place a boating mate up front, go wot and check if with prop aeration or back/over transom water...
  20. Sea Rider

    Strange Motor Behaviour.-

    No theory whatsoever, the wot rpm reduction is what dual installed tachs indicated under practice and 2 can't read wrong or way off. My guess is a gradual power loss on the Ignition Coil due to extensive use. Can run the motor at neutral at any rpm range all day long with 0 issues. If being a...
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