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  1. Sea Rider

    Engine height on Offshore repower.

    Placing the AV plate above, middle or under the boat's rear bottom in a Dry Installation doesn't say much. t's important to know at which lower leg the water flow is passing by, different heights dials different water performance. Each motor/boat installation it's unique and must be tested on...
  2. Sea Rider

    Pontoon Motor Selection questions

    Good working doesn't states if combo is agile on water, has a nice hole shot, only states overall boat's propulsion. If you go for a top prop maximization the working good will turn into awesome working specially if the motor revs middle to max wot rpm range as loaded which isn't known. In...
  3. Sea Rider

    2003 Mercury 40 hp 2 stroke

    Yep test as QBhoy suggests while pulling water toys on flat calm waters and check what's the wot rpm achieved on such test with current prop, will know how much pitch to drop from there for motor to rev to its full wot rpm range factory stated. Depending on "how much fun and speed scenario" you...
  4. Sea Rider

    What am I missing on this Tohatsu carb?

    Upper carb's bodies have those orifices regardless of which motor brand is it. Depending on location, if threaded are intended to hook brackets, for remote choke, throttle systems, if non threaded are fuel vents which releases fuel when the float's needle doesn't close firm against the valve's...
  5. Sea Rider

    Can you start these in cold temperatures out of water?

    If it's an outboard motor ? can test it at neutral for say 1-2 minutes with lower leg submerged in a barrel with an adequate high level of warm water. Happy Boating
  6. Sea Rider

    G3 analog tach reading high

    Install the induction tach and contrast it against the faulty tach readings. Clean all tach's electrical contacts, but usually once kaput and done must buy a new one, preferably buy an OEM. Happy Boating
  7. Sea Rider

    Thermostat housing hole.

    Yam's Multi Carbs Idle Balancing.- As wanted to know if 2 stroke Yam motors are factory delivered with equal number of pilot’s screws in-out turns decided to use a guinea pig motor which still retains their factory settings to check that out. It’s a 6 year old Yamy that powers a combo used to...
  8. Sea Rider

    M40D2 water system question

    If the posted upper pic belongs to the new replaced powerhead the water passages doesn't look in mint clean condition, has the exhaust cover and cylinder head been removed and their water passages cleaned out by manual scraping ? Can flush all day long al water passages with whatever product you...
  9. Sea Rider

    Thermostat housing hole.

    If you use your boat frecuently don't need to run the carbs dry, the issue is that sometimes will not know when will be your next outing. Always run my motors carb's dry after each outing taking avantage that while the motor drops dead can flush it nicely for at least 5 minutes at fast idle rpm...
  10. Sea Rider

    What Pitch To Buy

    Aside testing at close turns at speed must test under choppy, windy, wavy water conditions... Happy Boating
  11. Sea Rider

    M40D2 water system question

    The motor has always been used in river for extended years of usage ? If thermo it's working right and seems to be slightly overheating probably needs a full powerhead water passages clean out. River water surely contains lots of contaminants that could already have adhered to all the water...
  12. Sea Rider

    Thermostat housing hole.

    Congrats, excellent news and job done. The fuel leak was due to having such an awful internal carb mess. It would be the last straw for that to continue even though having changed so many carb parts LOL!! Did you happen to go for the 1 out turn on all 3 carb's pilot screws ? Happy Boating
  13. Sea Rider

    M40D2 water system question

    Thermo just cools the motor to work inside it's heat range, if doesn't open will have an overheat condition. With removed thermo and cup bolted on connect a water hose righ on the lower water tube, open the water faucett and check what happens. Is water coming nicely out the "hole", through the...
  14. Sea Rider

    1993 Yamaha 40hp 2 stroke lacking RPM

    Those jet things have a larger HP CC powerhead although being 40-50 HP cowl stated to compensate performance loss. Is it possible to raise/lower the motor say one notch and check if gained a higher wot rpm ? Those jet things should benefit running less size, lightly loaded boats to reach their...
  15. Sea Rider

    timing adjustment Nissan 25hp NS25C3

    That's an old recurrent topic, check for a post called something like Tohatsu 25HP/30 HP conversion, it's well explained including pics. Must remove the 25 HP air restrictor and install the 30 HP one. If current prop it's a 13 pitch, change it for an OEM 11, that motor comes factory delivered...
  16. Sea Rider

    M40D2 water system question

    By drive shaft's hole, you mean the one located on top the water pump housing where the shaft passes by located next to the black rubber grommet where the upper tube connects to, right ? Was checking a 2 stroke Tohatsu M50 which is the older brother to the M40 and there's no such hole circled...
  17. Sea Rider

    tohatsu m40d water pipe issue

    If all mentioned rubber components are fully rised to line up against the upper water tube as seen won't do a thing. Tohatsu should have drawn those 3 components right where they belong to to avoid missleading visual interpretation. If you look closely the upper water tube has a built in neck...
  18. Sea Rider

    tohatsu m40d water pipe issue

    # 31-32-33 parts attaches somewhere onto the upper/middle/lower portion of the lower base part # 3C8S013010 as seen in the Drive Shaft Housing page 43. If so will need to remove the powerhead, base pan and even the whole exhaust pipe to access the lower base and install those parts onto the...
  19. Sea Rider

    Thermostat housing hole.

    With a 5 minute warm up at idle the motor should be sufficiently warmed. Is it posible to test the motor with combo resting on water while anchored instead than on muffs, tub, barrel whatever holds lots of gallons of water. Being the pilot's screws found so far away from each other and having...
  20. Sea Rider

    Pontoon Motor Selection questions

    A 50 HP correctly propped will work well powering light to medium light loads, not heavy loads though. When running underpowered motors it's a must limit the passenger capacity on deck if wanting the toon to work and have fun as expected. Happy Boating
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