Honda BF8A hotter thermostat

[ancan]

Hi!
I've read in several places that the BF8A's thermostat opens up a bit too soon for it to run optimally, and many replace it with a hotter one. I know mine never pees anything but cold water, while on my Johnson it's luke-warm when engine is under load.
Do anyone have a part number or similar for a better thermostat? I've tried my local dealer but they just order their stuff from Honda and then it's only the original part. My googling-powers haven't helped me either.
Thanks,
Anders

 

[isaksp00]

My pee water is always cold (well, from the outboard that is). I think maybe the Honda 8HP class motors may route water from the pump to the engine such that the cold water goes out the pee hole, and not anything that ever went through the cooling passages. Maybe an expert like hondam knows.

 

[hondam]

Some manufactures offers different thermostats, not sure if the Honda does. Personally never had a need to change it. If there is any doubt get yourself an infrared thermometer and monitor the temps. Dont remember exactly what that engine should be but the vast majority of outboard should be between 140 and 160* F. Overheat conditions are anything over 180 and usually if your having a thermostat problems temps would not rise much over 100.

If your engine isnt running right, and your getting the factory specified temp then you probably have something else going on. Make sure your using the factory specified NGK spark plugs, double check the mechanical timing, check your valve adjustment, and set your idle miture screw back to the factory setting.

Keep in mind the factory setting for the idle on that engine is 1100 +/- 50 rpms. Which sounds high but that is what it supposed to be, it will idle much lower but is not recommend because it will not properly circulate the oil.

 

[ancan]

Thanks for the replies! I managed to find a source for the hotter thermostat, and it turned out it is the same one as the one I've got fitted. Yay!
Since telltale-water is cold all the time, I assume it's on a separate path from the cooling-water.

So if anyone else is looking, part number for the 62 degree C thermostat is 19300-881-741, and the colder 52 degree part is 19300-881-761.

Good to know about the idling, hondam. I guess I'll have to adjust it up some, because right now it's so low as I could without risk of stalling, and the oil-light is flickering. Couldn't get my rpm-meter to work, but I might as well set it to good trolling-speed.

 

[hondam]

The green light is not a good idicator, it basically only let's you know if there is any oil pressure not necessarily the correct pressure.