Search results

  1. S

    2016 Yamaha F4 Rectifier Wiring

    Unable to find any wiring schematics for my F4 four-stroke, to hook the rectifier up, including from Yamaha themselves! The F4 came charging ready, 6amp alternator. I bought the applicable rectifier from Yamaha, a four wire unit, 1 black, 1 red and 2 green wires. A four pin plug comes off the...
  2. S

    Oil Pressure Sending Unit on F150 Yammy

    Just wondering if anyone else has had this problem with the sending unit. First start up of the day, motor fires up and oil pressure light/beep comes on and stays on. Now, if you turn the motor off right away and restart it the warning light does not come on, nor does it come on when the...
  3. S

    Check Valve at Fuel Tank

    I"m still trying to figure out my Yammy fuel starvation problem. Replaced the primer bulbs, they work fine, re-routed and tried different fuel line hookups but, I still can't get the bulb to prime up nice and tight. I found through my trial and error procedures that there is a one way check...
  4. S

    Lift Pump Problem

    So I've narrowed my lack of fuel delivery down to the lower lift pump on the F150. It barely shows any vacuum at all on the inlet port and shows zero pressure on the outlet port. So my question is, which part is faulty, the rubber diaphragm, the small ports that are fixed in place in the valve...
  5. S

    2004 F150 Not Getting Fuel When Warm

    I know it's simple but danged if I can figure this out, nor my other 2 "expert" boaters so here I am again! Starting the motor, not problem, head out on lake for a 15 minute run at 30 mph to my fav fishing spot, no problem. Troll around with the kicker for an hour or two, light up the big...
  6. S

    Removing Powerhead on 2004 Yammy F150

    So, the manual says there are a total of 15 bolts that hold the powerhead on. After searching and searching, I've managed to find and remove 7 bolts, four from up front (two on each side) and the 3 that are at the very rear. The manual says there are 4 long skinny bolts on each side of the...
  7. S

    Oil Pump on 2004 F150 Yamaha

    So, I noticed some oil that had dripped down the outside of the leg and to the skeg, and after some investigation and cleaning found that it came from the seal on the bottom of the oil pump. There is a small drop that collects after a period of time on the seal so I'm guessing its hooped. Now...
  8. S

    2004 F150 Injector Update

    Just a FYI for those that think they may have injector issues. I did take mine in and get them cleaned (ultrasonically - ASNU) and new filter baskets and seals put in, about $180 to have it done. Two of the injectors were listed as "bad", one "fair" and one "good" on the report. It wasn't the...
  9. S

    Injector Screen???

    So I think I've narrowed down my "missing cylinder" problem, eliminated the spark plugs and am now looking at a plugged injector. The injector is working, gave it the "screwdriver test" and you can hear it clicking like the other ones are. When you pull the injector harness off it makes no...
  10. S

    The Infamous Yamaha F150 Balance Assembly!

    I've read a ton, make that 2 tons, of threads on the a/m subject, to the point of where not only I but other F150 owners acquired OCD over the blowing up of engines and whine of bad balance assembly's! I made the decision to just replace mine, swearing on a stack of bibles to my wife that it...
  11. S

    Yamaha F8 Four Stroke Smoking

    I have nearly 5000 hours on the 2004 kicker, its served me well. This past year it has started to smoke intermittently, 6 hour of running and then all of a sudden she'll smoke like blazes for about a half an hour. Compression seems good, 100 on top and 105 down below. It also doesn't use any...
  12. S

    2004 Yammy F8 Oil Seal

    The oil seal at the bottom of the powerhead (where the driveshaft goes through) is finally leaking, I guess after 4200 hrs something was bound to wear out. I cannot get this seal through Yamaha, it apparently is back-ordered from China! Is anyone aware of aftermarket seals that would be...
  13. S

    2003 Yammy F8 With Gas in Oil

    I have done many a search on various forums and this "problem" with gas in the oil seems to only be with motors that haven't been broken in properly. My F8 has 4065 hrs on it now and it has just started to belch gas into the oil in the past 30 or so hours. There is so much gas in the crankcase...
  14. S

    Dying 2004 F150 Yammy

    When the motor is running and I operate the trim/tilt the motor quits! I have noticed over the last couple of months that when the motor is running at speed and I operate the trim there is a sudden "glitch" in the power but then runs fine. The problem is intermittent but seems to be getting...
  15. S

    Loss of Power - Yamaha F150

    The motor runs fine for the first 10 minutes or so of operation but then won't rev past 4800 rpm. From there is goes down to about 4200 rpm and stays there. When I throttle down and have it at about 1400 rpm it stalls! Tough to start afterwards but it does fire up after some cranking. About...
  16. S

    Valve Tuning

    I did a search on this but nothing "jumped" out at me. I'm going to tackle adjusting/checking the valves on my F150 and was wondering if there was anything "dangerous" I should be aware of. I have a good manual explaining everything and looks pretty straight forward. One other question is...
  17. S

    No WOT on F150

    My F150 used to tach out around 5600 rpm, the last few times out it won't go past 4700 rpm. I don't think its overheating, water is flowing out of the back as usual, any ideas?? I did a search on this forum but couldn't find anything related....Sherm
  18. S

    Yamaha F150 -Tilt

    Another guy I know who has the same motor came up with a question I couldn't answer, imagine that ! When the motor tilts down, there is a "pinch point" where the motor bracket engages the clamp area, the motor binds when it hits this and slows the descent. Same thing when you tilt the motor...
  19. S

    Oil Filter for Yammy F150

    My search indicated this was asked last year but without any definitive answer, anyone in the mean time found a replacement filter? Cost locally for a Yamaha filter is $20.00. First time on this forum, looks like a dandy!! Sherm
Top