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  1. Rodman738

    50 Johnson lean sneeze!!

    I recently did a power head swap on a 1988 Johnson 50 Hp tiller. It has a lean sneeze or backfire at lower rpm that sometimes stalls the motor. I have swapped power pack,coils, ignition sensor,carburetors, plugs. There isn’t any lean adjustment on carburetors and the small orifice is clear on...
  2. Rodman738

    Nissan ns18c2 cuts out when you open throttle!!

    i purchased this Nissan 18 hp 2 stroke a year ago. I was going to use it on a 10 hp limit lake.the motor has always started and idles well. When I go to open the throttle it cuts out for a while then slowly starts to come alive. I have a 9.9 Nissan that I have swapped cd units ignition coil...
  3. Rodman738

    80s Johnson 20 thru hub exhaust not thru hub?

    I purchased a 20 hp Johnson with a bad lower unit a while back. I also got my hands on a 35 johnson that was locked up. After switching lower units which were practically identical I got motor running. Seems to run fine other than its kind of loud! I noticed there is no exhaust coming out the...
  4. Rodman738

    77 Johnson 6hp no spark below 3/4 throttle

    Just picked up this 77 Johnson 6hp. Motor is clean the guy I purchased it from said it was running fine!! coils plugs cdi box all look new. Motor only will run from 3/4 to full throttle! When you back the throttle a little bit it loses spark in both cylinders. i had another cdi box I switched...
  5. Rodman738

    9.8 Mercury "coughs" when cold!

    Im working on a 9.8 mercury in think 78.Motor starts fairly easy but until the motor warm up it will randomly cough.After it warms up runs fine. Motor has new cdi ignition. Have tried different coils. Have not tore into carb yet! Any words of wisdom would be appreciated!!
  6. Rodman738

    9.9 backfiring! Reed valves?

    I have a 76 johnson 9.9. It runs great at at at higher rpm. When you go slow to a idle it tends to backfire and stall sometimes. I have tried new points ,condensers,plugs,different coils,have tried different carburetors. Tried another armature but still have same results. My compression is 115...
  7. Rodman738

    Smoke out the telltale!! Mercury 9.8

    Recently purchased a 79 mercury 9.8. Motor will start,smoke will come out of telltale for a few seconds when water starts coming through telltale engine will stall! I'm no mechanic but I'm thinking I have a bad gasket? Just wanting a second opinion thanks. Love these Darn Mercury's!!
  8. Rodman738

    76 Mercury 110 no full throttle

    Bought a mercury 110 a few weeks ago. Motor is excellent shape cosmetically. Had not been used for years. Checked compression which is 110 in each cylinder. Rebuilt carb and fuel pump. New fuel line. engine starts rite up , idles well seams to run fine in test tank. When I get it on back of boat...
  9. Rodman738

    67 merc 9.8 bogging at full throttle!!!

    My 1967 merc 110 runs fine up to 3/4 throttle. When you try to go to full throttle the motor boggs instead of speeding up. Anyone have any opinions? Fuel or ignition? Have replaced diaphragm in fuel pump and replaced fuel lines, new plugs.
  10. Rodman738

    New impeller Week Pee!!! 67 mercury 110

    A friend gave me this 67 merc. 9.8. I just installed a new impeller and wear plate on my water pump. When I first started motor water came out strong then started to get weaker. At times the water comes out ok but almost quits at other times. What would my next step be to fixing this problem or...
  11. Rodman738

    67 110 mercury not peeing

    Just bought motor no water peeing out side. Ordered a impeller and new sleeve. Part list shows a tell tale hose and nozzle ? I don't have one on my motor. Does anyone know where it attaches to motor or do some models not have one? All help will be greatly appreciated!!
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