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  1. Sea Rider

    Cylinder Issue

    Engine started second pull, great compression with oversized piston. Idled for 15 minutes at neutral with 25:1 oil/fuel mixture while being flushed with adapter through water intake found at lower crankcase, Then after onto flat calm sea cond varying throttle from idle to 1/2 throttle for the...
  2. Sea Rider

    Lugging Dilemma.-

    Just repaired a 2 stroke Tohatsu 3.5 HP portable, it's going under its break in period with 25:1 fuel/oil mixture. Was pushing a boat that has excessive hull drag. From fast idle to medium throttle the small engine pushes top, when going to 3/4 throttle the engine revs up and in a short time...
  3. Sea Rider

    Cylinder Issue

    A machine shop for car use couldn't bore my deformed cylinder wall, crankcase is too small to fit their machinery, ended at a motorcycle machine shop. Have done an impeccable work boring the cylinder to fit an oversized piston and ring set. Have added new piston pin, ball & needle bearings...
  4. Sea Rider

    Newbie with first boat

    Picking the right trim is not done under trial and error specially if having fixed trim positions as of portable engines. Float boat alone with engine, trim to to a hole to achieve engine siiting perpendicular and brand sticker parallel to water level. When on plane anticav plate and boat...
  5. Sea Rider

    Nissan NSF5A carb question

    Have seen carbs in much worst conditions than yours which looks near mint, check this one, was put back to work with same original internal parts after a patient part removal and meticulous cleaning. Corrosion is usually an internal aesthetic issue, as long air & fuel passages are not...
  6. Sea Rider

    Hull Slide.-

    Is there a product on the market that could be applied to boat's hull to achieve a much better hull slide at speed ? Would polishing wax meet this requirement ? Happy Boating
  7. Sea Rider

    Evinrude/Johnson engine tuner

    If owning a healthy new or used engine you have 2 decarbon choices : -Either use Sea Foam or equivalent product mixed with regular fuel or -Apply decarbon product though carb throat at intervals of 100 worked hours. -OMC decarbonizer is more foamy, CRC is more liquid. Both works fantastic well...
  8. Sea Rider

    I swear...

    Before ordering a new 8.5 prop pitch that theoretically should put my engine revving at or around sweet 5900 wot rpm for my 18 and preventing my boating Club's savage staff over revving my beloved combo, have added a cheap plastic add on modification (X) that limits timing advance & carb sync...
  9. Sea Rider

    Prop Inquiry.-

    Just following the tech conversation. If adding 200 lbs of weight to my current combo the rpm drop will not be that significant as adding 286 lbs to pull my achieved wot 6200 rpm to safe 5800. All factory, Iboats included available prop selection goes from light, passing through middle to end...
  10. Sea Rider

    I swear...

    D day prop maximization was done early in the morning, while swapping props took advantage to install a new larger 30 HP trim tab to compensate better the extra torque the new eye catching prop color has achieved. 2 prop tests were done at open sea with near flat water cond. while lightly...
  11. Sea Rider

    Prop Inquiry.-

    New scenario : New 8 prop pitch arrived, As with previous lightly loaded solo driving test, this time on flat calm open waters combo achieved 38.0 Km/h at 5800 revs, but at wot the engine revs high at 6200 rpm, 600 more than with previous test, so the statement that there's a 150-200 rpm...
  12. Sea Rider

    I swear...

    Was about to bite the bullet an order a new Sea Rider 430 Alum Rib offered some months ago before the new SR 450 came into full operation. This drill is a tech comparison between a Sea Rider 430 Alum Rib and a 450 Fiberglass Rib. General Overview : Pros : (1) Naval alum made, endures more...
  13. Sea Rider

    Transom stress?

    What's the issue with this Boston Whaler clone, transom stress, overpowering with heavy engine, run under a piling pier ? Happy Boating
  14. Sea Rider

    I swear...

    Updates, My new Tohatsu 8 pitch prop has arrived, needs to be cleared out of customs, should put me back at 5800 max wot revs from my actual 5600 revs, that's with lightly loaded Rib and solo driver. Next weekend should be testing it properly on flat calm no wind water cond. Moved my...
  15. Sea Rider

    Fuel/Water Separator Inquiry.-

    A friend of mine wants to install a a fuel/water separator system which already has purchased. the one with disposable filter, was wondering when can you tell when filter is completely overfilled ? As those filters aren't transparent can't tell so you must.. - Change filter periodically -...
  16. Sea Rider

    Av plate questions

    Pak, If you haven't tested your combo yet, that's a dry installation which says nothing. If you want to dial the sweet transom/engine height to get all the available ponies out of any portable engine you must. -Have a healthy engine and prop -Engine trimmed at 90?, perpendicular to water...
  17. Sea Rider

    Water Separator.-

    A friend of mine who has a J-24 sailboat wants to install a water separatorr system for his 2 strokes 18 HP OB. Have seen WS on larger 30 & higher HP engines. Is there an issue for a small fuel pump diaphragm to work driving fuel through a water separator as opposed to larger HP fuel pumps ...
  18. Sea Rider

    Mercruiser 350 Prop Max.-

    Scenario : A friend of mine just bough a new 24" powerboat equipped with a new generation Merc 350 IB. He doesn't know much about engines bessides they run on fuel. The factory delivered prop which he doesn't know about its diam nor pitch broke while hittting a submerged object, that's the...
  19. Sea Rider

    Jammed Fuel Filter.-

    Was wondering if you guys have issues with Tohatsu main flters when removing them from filter body, Before going to E fuels you could remove filter bare handed with a simple tight twist. Now with E8 it's impossible to remove them as previous. E expands plastic filter threads and enlarges...
  20. Sea Rider

    J-24 Prop Maximization.-

    We're finishing painting a J-24 sailboat which will be powered by a 2 stroke Tohatsu 18 HP long shaft engine. This model revs 5200-5800 factory stated rpm. The standard delivered prop is a 3 blade 9 pitch prop which peforms excellent in light to medium aplications. Being a J-24 a heavy 1.5 ton...
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