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  1. J

    Mobster tab suggestions

    I have a 1988 Bass Cat Sabre boat, 18 footer with a Mercury 150 hp XR4. I want to add Mobster tabs. I am not sure which model I should order and where I should install them. I have posted pictures below. I am open to suggestions. I have pasted pictures below. Thanks Doug
  2. J

    Link and synch question

    I have a 1988 mercury 150 xr4 and am doing a link and sync. Anyone know what the primary throttle pickup is? Seloc manual online shows 22 degrees ATDC while it shows others are from 7-11 degrees atdc. Is this correct? Thanks Doug
  3. J

    Water drops on spark plug

    I changed the spark plugs in my 1988 mercury 150 xr4. I go to a lot of lakes that are idle only and change the spark plugs every couple of months. When I took out the old plugs all of them looked like they always do except piston number one. It was a little cleaner than the rest and had about 4...
  4. J

    bolt hole threads came out

    Noticed a little water dripping from poppet valve cover. So I removed cover and replaced gaskets. Some of the gasket material was gone. then reassembled the assembling and was putting in the bolts. I noticed the bottom bolt would not tighten it just spun. So i removed all of the bolts and...
  5. J

    Old Evinrude questions

    My nephew bought a small aluminum boat. It has an old evinrude outboard on it. Motor appears in good shape. The original owner told him it ran. It is a 1959 9 or 9.9 hp outboard. Serial number is 10024-01087. Can anyone tell me the fuel to oil ratio for this motor? Also what is the horsepower...
  6. J

    1988 mercury 150 xr4 weird issue

    Ok I have a constant beeping alarm when I start my motor after a few seconds. I just brought the boat out from winter storage. Temperature is ok. I have checked the oil injection and it is putting out oil like it normally does. It even has white smoke when running which tells me it is getting...
  7. J

    winterizing question

    I am going to winterize my boat in the next few weeks. I have a question about fogging the engine. I have a can of deep creep by the makers of sea foam. On the can it says it can be used as a fogging oil. Is this ok to use on the engine for fogging or should I get something else. I have an 88...
  8. J

    1988 mercury 150 xr4 carb cleaning

    I am going to clean and rebuild the carbs and fuel pump. Boat seems to be a sluggish in take off and I don't know when this has been done last. I have a couple of questions. First when I remove the carbs, which I plan on doing one at a time, is there anything I will need to adjust once I get her...
  9. J

    Knob on bottom fo steering column

    I have an 88 bass cat sabre with a mercury 150 xr4. There is a knob on the bottom of the steering column. What is its purpose. I have tried turning the knob but do not see any difference the the operation of the steering wheel. Thanks Doug
  10. J

    Mercury 150 xr4 oil injection question

    I have a question about the oil reservoir mounted to the tank. I noticed today while doing some maintenance on my motor the oil reservoir tank had an air gap at the top. I topped it off then bled the tank and lines. If I crack the cap open while the engine is running oil flows out the cap. So I...
  11. J

    Mercury 150 xr4 Constant Beep - beep - beep

    First off thanks to everyone for all of the great information on the forums. I have lurked here for a while and learned a lot. I have an 88 mercury 150 xr4 serial number OB289035. I have an alarm beep that has just started this week. It is a constant beep-beep-beep.......It starts after the...
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