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  1. J

    Yam 30 DEO 3cylinder -88 2-stroke won't rev up under load

    Hi, When in gear and given full throttle the rpm increase just a little bit, the only diffference is the sound, which is more "hollow", I guess that is from the air intake being fully opened. If no gear it revs fine. The engine always starts on the first or second try, even after sitting still...
  2. J

    Carb question for a Yam 30HP 2-stroke

    Hi, I got 30 DEO (6J8) -88 and it won't rev under load. So I decided to clean the carbs... Question #1: I can't figure out how to get main nozzle out, the main jet was easy (#14 in the diagram attached), I read somewhere that it should fall out if you shake the carb upside down. That doesn't...
  3. J

    Yam 30HP, 2 stroke slow to plan...

    Hi, I run a Yamaha 30 HP 2 stroke (3 cyl) 1985. The boat is an open 4.35 m, 400 kg w relatively flat bottom (easy to plan). I have cleaned the carburators, disasmebeled the jets (main jet and pilot), the float and needle. Change to new sparkplugs. Changed to fresh fuel. Changed to fresh oil...
  4. J

    Pilot Valve setting for Yamaha 30 DEO -85

    Hi, long time since my last post! We just got a "new" boat with a Yamaha 30 DE0 from 1985 (6J8). I had problem to get it running stable on idle, I checked with my clymers guide (which covers yammies from 1992-2004, not my year) and it stated that a 30 HP 3 cylinder should have different...
  5. J

    Can I overcharge my battery?

    Latley I have seen a new "problem" with my Yamaha 90hp 2 stroke -2000. I used to charge very nicely at around 14 V when cruising. But latley I have reached 16.6 V and the voltage-figures starts to flash in my digital multi speedometer. I thought this was a bad omen so I turned on the lights to...
  6. J

    Looking for a modern 4-6hp 2-stroke...

    Hi,<br /><br />I'm looking for a new smaller enginee (4-6 hp) to my fathers boat.<br /><br />Since we are aware of all that new techology in the 2-stroke area and we have learned to appriacte the benefits from the 4-stroke we would like the best from both.<br /><br />That will say, a light...
  7. J

    Sleceting a stainless prop?

    Hi,<br /><br />I'm about to replace my original aluminium prop (13 1/4x 17) by a stainless one. :cool: <br /><br />I have a Yamaha 90hp 2-stroke (2000) for my 18' bowrider.<br /><br />I do fishing, crusing and water skiing.<br /><br />Today there is no problem to pull up a person on 2 skiis...
  8. J

    Mysterious horn-alarm!

    After installing a digital speedometer (with time and voltage function) my horn went of if I turn my startkey 1 position (to start instruments) if the engine isn't lowered.<br />This never occured before (when just having the rpm/trim/oil- multi instrument).<br />I normally want to start the...
  9. J

    Thread size??

    I just found out the the link between my teleflex and Yamaha 90 hp was mounted with an incorrect screw.<br /><br />The "tiller" hole (actually there is two, I guess that the one placed in front is for twin mount) is threaded. I now have a M8 bolt which is to small for the thread, it can move...
  10. J

    Clear pitot hole from c-pin?

    I have found that my pitot hole on my yamaha 90 hp is plugged with a c-pin (the previous owner have made a couple of strange thing with my "baby").<br /><br />Any suggestion how I can remove it?<br /><br />I was thinking maybe using a tap and then fit a screw in the hole in which I can pull both...
  11. J

    Strange part on my yamaha?

    On my yamaha 90 hp i have a strange part, its a bracket, bolted to the engine mount on the righthand outside just below the trim/tilt assembly.<br /><br />The part is a stainless steel bracket, 2mm thick an 30 mm long, with two holes, the free hole is pointing backwards.<br /><br /> :confused...
  12. J

    Cleaning pitot-tube..

    I have now found (after installing my new lcd-logg) that my pitot-tune in the gear house is plugged. Someone (iguess the prevois owner) plugged the hole with a c-pin.<br />Any idea how to remove it or any other operation that might help me get things working.
  13. J

    Resetting digital instrument...

    I have bought two new (second hand) digital instruments to my yamaha 90 hp. I wish to reset the total "in use"-time for them, can that be done using the dipswitches inside?<br /><br />Anyone having a schema for what the internal switch are designated for?<br /><br />TIA<br /><br />Jakob
  14. J

    Installing Yamaha speedometer

    I just installed my new digital speedometer to my Yamaha 90 hp 2-stroke.<br />All electric functions worksfine but I don't pick up any speed.<br />When I blow in the hose to the speedometer I get readings.<br />When I blow in the hose that goes to the gear house nothing happens, I can not press...
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