Search results

  1. S

    How do you use a timing light???

    Hi, i know how to set it up i.e cylinder 1,and the red and black wires but, I really don't know anything more about it.. I hook it up and i see a light flashing and it becomes steady when i rev the engine but what how do i use it specifically.. I see my timing marks on the flywheel but what am i...
  2. S

    Timing markings???

    75 merc 500 50hp <br /><br />My timing belt broke yesterday,so i pulled the flywheel off and then i took off the pulley inside the flywheel(it has like 9 little bolts in it)I put a new belt in it but now i'm having problems lining it up??? I see on the distribitor that there is a straight line...
  3. S

    Did I mess with the timing???

    75 Merc 500 50hp, I was trying to adjust those little tunions(barrels) on the side to adjust the linkage...I know one operates the throttle,what does the other operate..did i hurt the timing??? thanks Erik
  4. S

    carbs acting up???

    75 merc 500 2 cycle, The engine runs fine and has good compression but when i put it in the water it only goes about 10mph, It sounds like it isn't getting alot of gas,however I took the carbs apart again and the directions say to adjust the main jet screw 3/4 of a turn however the shop manual...
  5. S

    Link and sync????

    What exactly is a lync and sync I see alot of posts about it??? how do you do it?? 75 merc 500 is it the linkage near the throttle cable??? thanks
  6. S

    Can you adjust carbs???

    75 merc 500 50hp,good compression,new fuel pump I see an adjustment for the idle speed but is there something for high speed adjustment?? if so where and how do u do it thanks Erik
  7. S

    Carbs or Compression???

    Hey Guys I have a 1975 Merc 50 HP that sat idle for 20 years, I cleaned the carbs,rebuilt the fuel pump and acourse a new water pump..started right up..this is the problem I idles great,but when i put it under load it stalls out.If I floor it I goes about 10MPH hr then bogs down to 5 or so...it...
  8. S

    any way to test a switch box???

    Hey guys anyone know how to test an switch box for a mercury 500 thanks
  9. S

    new carbs now i have no spark???

    I replaced the carbs yesterday in my 75 merc 500. Now I have no spark???? The only thing i didn't replace totally were the screws the hold the switch box in...Would this have to be grounded???? any ideas were to start?? Erik
  10. S

    no start no gas

    I have a merc 500 1975, I can't get it to start at all. Good spark but I do notice when I prime it,I see gas leaking from one of the carbs. Would this cause the problem???? Also Should the spark plugs be wet if I was trying to get it to go???? I do have gas at the fuel pump.. Please help thanks Erik
  11. S

    This is wierd

    I have a 75 mercury 500 50hp..ran excellent yesterday, I put it in the water today and the engine would start and die within 5 seconds.. I pulled the plugs and it seems to be getting spark however I notice the plugs arent' really "wet". Should they be???? also when i prime it(nice and hard...
  12. S

    Is it safe???

    I just inherited a 1975 mercury 500 50 hp. It was sitting over 20 years before i replaced the fuel pump,plugs,water pump and ignition wires. The engine started yesterday and ran fairly good. Is there anything else i should do before i take it out on monday?????? What is the life expectancy of...
  13. S

    How hard to rebuild the fuel pump??

    I have a 75 Mercury 500 I have the manual but it doesn't go into great depth on how to rebuild it. I have the rebuild kit and all..just wondering how hard is it going to be any idea??? thanks Erik
  14. S

    any good 2 cycle engine additves??

    Hey guys looking for a good 2 cycle oil additive??? any good additives that work well if so where can i get them thanks Erik
  15. S

    Water Clogged???

    I have a 75 mercury 50 HP 500, I can't figure this one out. I put a new impeller in it and still no water coming out the tell tale hole. There is steam and exhaust coming out of it.However when I spit water in the tell tale hole it comes out somewhere in the midsection,not the copper pipe or...
  16. S

    Is this normal for a water pump

    I just installed my new water pump impeller It was bigger than the cup it fits into, so i had to bend the vanes to fit it in..is this normal???? And it still isn't pumping and suggestions???
  17. S

    Water pump problem

    I have a 75 500 mercury 50HP which has been sitting for sometime. it started right up yesterday however when i put it in water the tell tale hole doesn't "spit water" nothing it when i try to flush it out thru the copper pipe i can't get any water into it???? new water pump impeller... any...
  18. S

    How do you align upper shift lever and lower unit

    Thanks for answering my orginal question about no neutral or reverse but how do i get the lower end shift spline in neutral? also it seems on the lower end no matter which way i turn the shift spline, the prop never goes free or reverse is that normal???<br /><br />should i try to turn it with a...
  19. S

    No Neutral or reverse

    I have a 75 Mercury 50HP i dropped the lower end yesterday when I put it back I have no reverse or neutral. The lever pulls fine and the engine starts what gives????<br /><br />Also I have no water going from the tell tale hole but water pump looks okay ..any ideas how to flush it???? thanks Erik
  20. S

    No Neutral or reverse

    I have a 75 Mercury 50HP i dropped the lower end yesterday when I put it back I have no reverse or neutral. The lever pulls fine and the engine starts what gives????<br /><br />Also I have no water going from the tell tale hole but water pump looks okay ..any ideas how to flush it???? thanks Erik
Top