Recent content by kmk89

  1. K

    Mark 28a Rewind Starter Pawls Wont Engage

    I recently got a Mark28a for free. The automatic rewind starter had a broken spring and bad pull rope, so I replaced both. The problem is I cant get the pawls to catch the fly wheel once everything is reassembled. I decreased everything and re-lubed everything before reassembly, but the paws...
  2. K

    Mercruiser Factory Service Manual Number

    Does anyone happen to know the factory Mercruiser service manual number is for a 4.3L 220hp Mercruiser Engine? Serial number is 2a190724. I believe it's a 2014 since that is the year of my boat. This particular engine has CATs. Every manual I have seen says "not for catalyzed engines". Thanks!
  3. K

    DVA readings on Japanese Mariner 4hp

    I have a 1983 Japanese Mariner 4hp motor. I have a real hard time starting it. I have a factory manual and have tried all the resistance readings. Everything checks out. New spark plug and new fuel too. I have a DVA meter but the factory manual does not list any DVA tests or readings. I saw...
  4. K

    1978 Mercury Inline 6 90 HP Lower Unit Shims Below Water Pump Base

    I recently changed the gear oil in my lower unit and noticed some water in the oil. Before I attempt anything hard with the lower unit, I would like to try replacing the oil seals at the base of the water pump since I have replaced the impeller a number of times and I know how to do it. I have...
  5. K

    Boat Instrument Gauge Lights Not All Working

    I recently wired up my instrument gauge back lights. I have a Voltage Gauge, Tachometer, Water Pressure, Fuel, and Speedometer. All gauges worked no problem at the end of last season and they are only about 1 year old. The power to the instrument gauge lights is fed from my battery to a...
  6. K

    Prop Nut Torque 1978 Mercury 90hp Inline 6

    Does anyone know the correct torque for the prop nut on a 1978 90hp Mercury inline 6? My engine is the 900 series from '78. Also wondering what the shop manual is for engine. I think most shop manuals have a "part number" or something so you can look them up. I can't seem to have any luck...
  7. K

    RPM at WOT on a Inline 6 Mercury 90hp

    I have an 1978 inline 6 Mercury 90hp on a 16' bass boat. Just installed a tachometer, water pressure gauge, and water pump and took it out the other day. Water pressure at WOT is about 8-10 psi and about 2 psi at idle, which seems good. Engine has good even compression, but at WOT, the tach...
  8. K

    Mercury 90hp Inline 6 Power Tilt/Trim Fuse

    I have 1978 Mercury 90 hp inline 6 with the two ram power tilt/trim and external pump. My pump is the older style single solenoid system setup and not the dual system solenoid setup. From my readings, the dual solenoid system has two fuses, a 90 amp and a 20 amp fuse. I couldn't find any...
  9. K

    Changed Water Pump on Mercury 90 but Now Engine Lower Unit Always in Neatral

    I just replaced the water pump on my 1978 Mercury 90 (inline 6). When I put the lower unit back on, the gear control box is in neutral and the prop spins freely in both directions as it should. But, when I put the gear control box in forward (all the way) and the prop still spins freely in...
  10. K

    Correct Spark Plug for Mercury 900 Inline 6 (90hp)

    I have a 1978 Mercury 900 (90hp) inline 6. I just got it and wanted to replace the spark plugs on it. The current spark plugs in the engine are NGK plugs Part No BUZHW, which I believe are the resistor type spark plugs. I just want to confirm that you can use these resistor type spark plugs...
  11. K

    Info on Mercury 125 BP

    I have a 1978 mercury 900 (inline 6 90hp) that I am trying to find some spare parts for. I came across a Mercury 125 BP that is an inline 6 also for $75, so my question is can I use Mercury 125 BP parts on my engine? I know nothing about the 125 BP model so any info would be useful.
  12. K

    1979 Mercury 90 Inline 6 Wiring for Gages

    I just got a used 1979 Mercury 90 Inline 6 and I am looking to install some gages. Specifically, a tachometer, water pressure gage, and an engine temp gage, but I have no idea what wires go where or if I have to move any wires around on the engine. Installing the gages is easy, but the wiring...
  13. K

    1980 Mariner 60hp 2 cylinder compatibility with Yamaha Commercial 55hp 2 cylinder

    I need to rebuild my Mariner 60hp 2 cylinder, but I cannot find any parts. My Mariner is the Japanese built model and it looks like the Yamaha commercial 55hp 2 cylinder. I am wondering if they are identical, but just have the Yamaha stickers. Sierra makes less expensive replacement parts the...
  14. K

    1980 Mariner 2cylinder 60HP No Power Under Load

    I have 1980 Mariner (Japanese Model) 2 cylinder 60HP. I had it out on the water a few week back, hit a huge amount of wake from another boat and the motor died. Pulled off the engine cover to find a sheared the flywheel key, damaged the flywheel keyway, and sheared off the starter cover...
  15. K

    1980 60HP 2 cylinder Mariner Top Speed Less than 28mph

    I just picked up my first boat the other day with a 1980 60HP 2 Cylinder Mariner on it (motor looks like an alien head). The boat is a fiberglass 15ft TideCraft V-15 rated to a horsepower of 100. Engine has 130 psi compression in each cylinder, good spark on both plugs but the prop is pretty...
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