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  1. Yamajoe

    F100 engine siezed?

    A friends F100 started to make sickening noise after running at WOT for about 15min, he managed to get back to dock at low idle; this was about a week ago. yesterday a leakdown test shows good readings for cyl 1,2 and 4. #3 is leaking air out of #4 sparkplug. the motor appears to be seizing as...
  2. Yamajoe

    F80 convert to F100

    I have just fitted a F100 powerhead onto my original F80, i am fitting the F80 carbs on now and will hopefully have the motor going tomorrow: the question i have is what do i need to do to get the F100 power;
  3. Yamajoe

    1999, F80 Powerhead removal

    Guys, first timer with this job; i am removing the powerhead and refitting a recon PH, I have the manual, tools etc, Is there tricks, shortcuts, surprises that i should be aware of?
  4. Yamajoe

    F80 Fuel pressure check

    I am sure i have a fuel restriction or leak problem. I want to check the fuel pump pressure and vacuum, what should the pressure/vacuum readings be? and should i T into the line beofe the pump or after the pump?
  5. Yamajoe

    2000 carbed F-80 cylinder head

    I am about to put a new head gasket onto my F80 do i need to use some type of gasket sealant?, The manual does not specifiy the use of a sealant, the reason i ask is when i took the head off there appears to be some form of gasket sealeant (black in colour) on the head and block side. Is this...
  6. Yamajoe

    F80 1999

    I lent my boat to a friend of mine a few weeks ago he complained of bogging, so i decided to clean the carbs on my 1999 F80. As i did this i took pictures of the various stages of tear down, put everything back together and motor starts and idles perfect haven't taken it out for a water test...
  7. Yamajoe

    6hp two stroke

    Fellas, what year is this 4hp 2 stroke, 6EJ /6/ 148045, my nieghbour was gonna dump this motor, i picked it up for free, the flywheel spins, and its shocking to look at, its got more barnacles attached to its shaft than moby; notwithstanding, this my friends, will be my next project. cheers YJoe
  8. Yamajoe

    F80 loud trapping noise

    Happy New Year.My 1999 F80, recently developed a tapping noise following a spate of bad fuel in the system. I cleaned the carbs, 4th carb blocked main jets, in boat fuel/water separtor filter was dirty, replaced with new, checked fuel pumps, the diaphram in one of the pumps is stretched, but no...
  9. Yamajoe

    Johnson115hp Timing

    Gidday, this is my first time online: I have a Johnson 115hp (EO-EC) ? 60* V4 loop charged; 1727cc; my manual tells me i need to connect an OMC engine analyser in order to tune for advance and retard. Is this the only way i can time this motor? Will a timing light do the job? have a good day folks.
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