My geny started ,ran, then spluttered to a stop. fuel dripping from air filter box.On investigation there is fuel/oil mix coming from breather tube into air filter. Took out oil filler plug and fuel/oil mix came pouring out!!! Float seems to be ok.stops flow when raised. what`s going on?
SOURCE: oil blowing out of trans breather tube
hi 81 yamaha i am concerned about the fuel smell coming out with the oil. could be the carbs flooding filling your crankcase with fuel? if not it sounds like you have blow by which would cause your crank case to be slightly pressured. this is caused by worn piston rings. do not plug your crank vent. if you leave your vent open install small filter to stop dirt from entering jim
SOURCE: Kolher 17hp motor blowing oil/gas mix out of breather tube
I had the same problem! I found that the needle valve in the carb was not shutting off the fuel flow when not running. Either replace needle valve or put a shut off valve in the fule line. Should take care of the problem
SOURCE: ONAN 4000 RUNS FOR ONE HOUR AND DIES--ANY IDEAS WHY?
If your unit is running fine and then all of a sudden it just shuts down it is usually that you stopped creating voltage. You need to check the brushes and rings. If you are able to start the unit right up without any hesitation and voltage is being produced, then your fuel pump is breaking down. If you do have hard time restarting then you may have clogged fuel filters. One at the carberator and one at the fuel pump.
SOURCE: Coleman Powermate 5000 starts with starter fluid, but leaks
Sounds like you need to clean the carb ports, lines, jets, etc... purchase a carb spray cleaner with a tube to place on the spray head (Berryman's Chemtool B-12 is awesome). Take the carb loose from the generator, and remove the bowl, needle valve and spray carb cleaner thru all the holes, lines in the carb. Reinstall complete with air cleaner and retry... also if the gas is old, drain and replace with new...
SOURCE: Fuel from engine breather pipe
There are just three ways for fuel to get into the top end. As mentioned, bad valve guides (exhaust guides are just as old as the intake guides). Bad rings with raw fuel getting past the rings. Either way, fuel is getting up there. Time for a valve job and fresh bore with new pistons and rings. If able to find the parts, I would also install new cam chain and tensioner. You have a very early CB450. Today's VIN numbers have 17 numbers. That is what didn't seem right.
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Go to the site below where you can see a parts diagram for your specific bike. I already checked and a lot of parts are available for your bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx
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You can also Google 'vintage motorcycle parts honda" and find stuff there.
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