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  1. C

    Hard to start

    "1979 150 h.p. S#5342163 I ha "1979 150 h.p. S#5342163 I had a mechanic look at this and he could not figure out what was wrong. The only advice he had was to rebuild carbs. What he did was check for spark, compression and fuel pressure. The problem is it will not start easily or...
  2. C

    EZ shift speedo

    "I have a 79 V-150 that has a "I have a 79 V-150 that has a 1/4" hose coming out of the forward part of the lower housing(mine is cut short/disconnected). I was told this is for a built in speedo and I looked in my Seloc to see if I could find more info. I verified it is a speedo line but could...
  3. C

    Prime with fuel

    79 150hp Merc. I need to prime 79 150hp Merc. I need to prime the carbs with a shot of fuel using a spray bottle. It's only when the motor is cold.
  4. C

    Propeller PitchRPM

    "Is there a basic rule of thum "Is there a basic rule of thumb for how many r's are gained for the next pitch on prop. I want to gain 1000 r.p.m and not sure how far to go from a 21 degree. What difference will I realize with a 19? I understand the differences have many variables, but is there...
  5. C

    Proper plug wires

    I have a 79 150hp with type II I have a 79 150hp with type III ignition. I am wondering if the type of spark plug wire I should use is the "metal wire" or the "suppression" type wire since it is electronic ignition. I have 440 cable and would like to use it but wonder if there is any reason why...
  6. C

    Outboard depth

    "Is there a limit to how far i "Is there a limit to how far in the water an outboard should sit for optimum performance and speed. I have a 83 Four Winns, 18 foot fiberglass with a 150hp Merc. The motor is so far in the water that when under way you can not even tell its pumping water because...
  7. C

    Installing gauges

    I would like to hook up a temp I would like to hook up a temperature gauge and water pressure gauge to my 79 150hp. Can I get instructions on where to connect to the motor?
  8. C

    Mercury model #

    First Merc. The tag reads seri First Merc. The tag reads serial #5342163. Is this how I find the year and model #? If so can someone give me that info. If not can someone tell me where or how to figure this out?
  9. C

    Is there a significant difference in HP

    "I would like to increase my p "I would like to increase my power. I currently have a 71 50hp and have an opportunity to acquire a 73 60hp for a reasonable price. Theses are both electric shift motors so the controls are interchangeable and a switch would be very simple. My concern is the power...
  10. C

    Electrical problems#%24%25

    "My 1971 50hp.is trying to giv "My 1971 50hp.is trying to give me an ulcer. I have had flawless use from this motor for many years until last night. At the launch I tried to start it but found it was not getting spark. After testing both plugs I was retesting the #1 plug (I always double check...
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