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  1. M

    Broken Thermostat Housing Bolt

    We were typing at the same time! Are you the one who suggested the center drill to me several months ago for my BF50 exhaust plate issue? It worked fantastic.
  2. M

    Broken Thermostat Housing Bolt

    Drill, tap and insert a helicoil or time-cert. There are kits online that include the drill bit and insertion tools. If it's broken below the surface, measure the size of the hole with a caliper and get a center-drill with an outer diameter the same size as the hole. Search Harbor Freight for...
  3. M

    Hard to synchonise Honda BF50A - 98

    Excellent great job!
  4. M

    1998 honda 75 hp completely dead

    My first thought is check the cam timing. Check the ignition timing too if it's adjustable. Also check the valve clearances and compression or leak-down test, with the goal being to figure out if any intake valves are leaking. Lastly, you've got it out of the water but in gear and revving...
  5. M

    Hard to synchonise Honda BF50A - 98

    Did you clean the insides of the carburetors, in particular where the butterfly valves close against the carburetor? If not, then check that first. Once that's clean, use the adjustments on the linkage between carburetors to get them all balanced. If you haven't been adjusting those, then...
  6. M

    Help please tohatsu 6hp

    If it does not run on the internal tank, and you have to continually squeeze the ball when on the external tank, then the fuel pump would definitely be on the suspect list. What happens if you use the external tank and ball to prime the carburetor, then switch to the internal tank? Does it...
  7. M

    Help please tohatsu 6hp

    Based on my experience with my 2014 Tohatsu 6HP (probably the same as yours): If you're using the external tank, you do not need to open the vent on the internal tank. Turn off the internal tank and unplug the external hose before laying it over for transport. It will transport just fine if...
  8. M

    1996 BF50 Honda Bogging out when trying to plane

    Excellent job sticking with it, hopefully it will run for a very long time. :)
  9. M

    1998 honda 75 hp completely dead

    My first guess is, that looks like the trim angle sensor. What it's doing under the hood is anybody's guess.
  10. M

    1998 honda 75 hp completely dead

    Start at the starter solenoid. Does it get the 12V signal when you turn the key? If no, the work backwards towards the key. If yes, does it supply 12V to the starter (check the big wire on the starter)? If no, maybe the solenoid is bad. If yes, the starter may be bad.
  11. M

    Gas and Ethanol

    Don't bother trying to remove the ethanol from gas, it's not worth the effort. Your motor will run OK on the ethanol, it's just not good for storage. Stabil brand stabilizer seems to work good for me. My little Tohatsu 6HP only gets used a couple of times a year. All I do is drain the carb...
  12. M

    Can't prime my fuel line

    If it's staying squished then it can't suck fuel from the tank. Something is obstructing the flow. Check everything between the squeeze bulb and the tank, and make sure the vent is open on the tank if it has a closable vent. If there is a fuel filter or fuel/water separator between the bulb...
  13. M

    Tohatsu 9.8 hp oil recommendations

    Quicksilver is Mercury's brand, it's typically decent quality. Just check the spec on the bottle against the spec in the motor manual. If the specs match then you're fine. You don't need specifically "marine" engine oil, if the specs match then you're good. I've been using that gear oil in...
  14. M

    Tohatsu 9.8 MFS (maintenence/storage)

    Really make an effort to find ethanol free fuel, it does make a big difference in how well it stores. I've used StaBil with success, probably any big name brand is OK, but in my experience, strait ethanol free fuel seems to store better than ethanol fuel with stabilizer. Ethanol free fuel with...
  15. M

    Honda BF75 "Making Oil" – Need Help with Thermostat in Cold Climate

    The oil isn't milky because the "newly made oil" is fuel. Not all fuel burns, some unburnt fuel gets by the rings. In a hot motor it steams off, the PCV system routs it back to the intake where it eventually gets burned. In a cool motor it condenses in the oil. You can send a sample for oil...
  16. M

    Honda BF75 "Making Oil" – Need Help with Thermostat in Cold Climate

    Even if the thermostat keeps the block up to temp, I think your main challenge is the oil sits in a metal pan below the block where it's cooled by the environment. At idle or low speeds there just isn't enough heat being put into the oil to keep it all hot when so much heat is lost through the...
  17. M

    1996 BF50 Honda Bogging out when trying to plane

    Hopefully the new CDI will do it. If the seller had a lot of good feedback then odds are in your favor that the new one is probably OK. I'll keep my fingers crossed.
  18. M

    Break in oil

    I bought a Tohatsu 6HP online about 10 years ago, it arrived empty and with no oil in the box. Side note, and I have no idea if this applies to your motor, but I was being careful breaking mine in and it would burn a little bit of oil (some blue smoke). Someone familiar with the little Tohatsu...
  19. M

    1996 BF50 Honda Bogging out when trying to plane

    I haven't had the head off of one of these things myself, but I believe @ahicks has worked on a ton of these. Unfortunately it looks like he hasn't been online here since 2023, I hope he's OK. If you did the descaling rinse, my guess is it's likely cleaned out good at this point.
  20. M

    1996 BF50 Honda Bogging out when trying to plane

    I hope that's it, please be sure to post back and let us know the results!
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