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  1. Keithm18

    How to tell the difference between a 16A and 40A stator

    Hi Guys. I have a 91 200Hp Mariner. I am looking to replace the stator and am not entirely sure if it's a 40A or 16 Amp Stator. I can tell you it only has two yellow wires and not 4.... Is there a quick way to tell which one I have. Thanks, Keith
  2. Keithm18

    Mercruiser Alternator Help please

    Hi All. I am helping a friend of mine to replace the head gaskets on his boat, which is fitted with a GM 350 V8 with the mercruiser add on's... It's a mid 1980's motor. After a great deal of effort we now have everything back together but we neglected to take note of the alternator wiring...
  3. Keithm18

    Help with trim motor replacement. 91 Mariner 200 HP

    Hi All. So the trim motor on my 91 Mariner 200 V6 has finally given up the ghost. I have ordered a new motor which comes with the pump as well. From previously removing the electric motor I know the pump was stuck in the “trim” unit. It’s part four on the type 1 parts diagram. Any ideas...
  4. Keithm18

    Trim & Tilt problem on 91 V6 200 HP Mariner

    HI All. I find myself in need of your assistance please. I have a 91 200 HP V6 Mariner on my bowrider. This weekend the trim and tilt stared to act up. I have looked at my manual and can find pretty good information on the two wire, round motor setup. I have the three wire, square...
  5. Keithm18

    TC-W3 Two Stroke oil safe to use?

    Hi All. Long time no posting from me. I have a 91Mariner 200HP V6, carb version with oil injection still intact and fully operational. I bought some new two stroke oil yesterday, but when i got home I noticed it is TC-W3 and "reddish" in color (looks almost like ATF) Normally the oil i buy...
  6. Keithm18

    Help needed with home made DVA and stator tests please

    HI All. I need your help please. I have home built a DVA meter using a 1A, 400V rectifier Diode, 1 22uf; 400 V DC capacitor and one bleed resistor of around 1 Mega Ohm. I am trying to track down an intermittent spark problem on my 91 V6 200 HP Mariner. Here's the problem, with the motor as...
  7. Keithm18

    1991 200hp Stator question

    Hi All. I am chasing a problem on my 91 200 v6. i do a lot of low speed crusing with the kids on the tubes. Every now and again when i am getting out of the hole slowly (not just banging the throttle down, more opening it up gently) i sounds like i am losing one or more cylinder for a few...
  8. Keithm18

    1970's Mercury 200 20HP. Advice needed

    Hi All. i have a 1970's 200 20HP mercury tiller motor that i am bringing back to life. This motor stood for at least 10 years without running. For the most part the motor is in great condition. Compression is 115 PSI on both cylinders. I am going to replace the water pump and impellor. I...
  9. Keithm18

    Advice needed on steerring for 200hp mercury on 18ft boat

    Hi All. I'm running a 200Hp merc V6 on my 18ft bowrider. i have a "non hydraulic" system on the outboard at the moment. really tough to turn some times and get a lot of torque steer at lower speeds. got a scare a few weeks back when i hit someone elses wake at a pretty high speed and the...
  10. Keithm18

    Assistance needed with Quicksilver remote

    Hi All. It's been a while since i posted i have a 91 200hp merc. The motor is great, but i am doing some refreshing on the upholstry and need to remove the remote assembly it's a quicksilver side mount with the round button. Have pushed in the throttle only button moved it to WOT and removed...
  11. Keithm18

    Head and tell tale temp on v6 200hp

    Hi All. Got my boat back from being serviced recently. I got an overheat buzzer the previous time i was out prompting the service. Thermostats were replaced, water pump and all gaskets were replaced and poppet valve was also completely disassembled, cleaned and put back on. I also had a water...
  12. Keithm18

    Stripped Jet thread on carb.

    Hi Guys. I need your help please. in my search to confirm if my carbs had the right jets for the new altitude, like an idiot i tried to install a jet at the wrong angle and stripped the aluminum carb threads. 1991 200hp V6. On the top carb there are two jets, one on either side of the carb...
  13. Keithm18

    Advice needed on Jet Sizes please.

    Hi All. I'm in need of your kind assistance again please. I have a kind of new to me 1991 200hp mariner. Serial number 0D068540 While getting to know the motor I have come across a few things that tell me that it might have been fiddled with before i got it, so i am nervous that certain things...
  14. Keithm18

    Currently on 19 P. Have plenty power looking for a bit more top end...

    Hi Guys. I have an 18.5 Ft Bowrider with a 91 200 Hp mariner V6. I currently have a 19P Laser II, vented Stainless prop on it, which is what I got when I bought the setup. The boat jumps out of the hole and is very responsive with the slightest touch of the throttle. When trimmed properly...
  15. Keithm18

    Lync & Sync 1991 200 Hp V6 Question

    HI All. Long time no post.... I have rebuilt the carbs on mt 91 200 HP and am in the process of re-installing them. In doing the lync & Sync process I have found what I believe to be an error in my manual and as such want to ask the experts. The manual says to ensure that the throttle stop...
  16. Keithm18

    Fitting a temperature gauge 1991 200 Hp Mariner

    Hi guys. I need your help again please. In reading my manual i have found that my motor should be fitted with a temperature reading unit that will enable me to fit a temperature gauge. As I understand it on the Port (Left) head of the motor there is a two wire sensor with a plain tan wire...
  17. Keithm18

    Correct sparkplug on 1991 200 HP

    Hi Guys. Another quick one. I noted in my manual that I should be running NGK BU8H plugs in my 1991 Mariner 200 HP, however the motor currently has NGK BUZHW plugs fitted. The BUZHW plugs are shown for use in the 225 Motors and not the 200. They are both surface gaps plugs. Can you confirm...
  18. Keithm18

    Hard starting 1991 200hp

    Hi All. I have a new to me 91 200hp v6, motor has just over 500 hours on it. runs great and operates at 5000 rpm with with no problems. When warm starts no problem, a simple turn of the key, however when starting for the first time or from cold i have to crank the thing for close to two minutes...
  19. Keithm18

    Approximate oil consumption.

    Hi all. I just took delivery of my new boat, with a 91 200 v6, carbed. it has a small tank on the motor and another in the boat. There is a built in fuel tank which holds 100 litres. Not sure how much that is in gallons.... There is 6 litres of two stroke currently in the tank in the boat...
  20. Keithm18

    Please help me with an approximate year of manufacture on this motor

    Hi All. I am negotiating to buy a new boat at the moment. My 81 Johnny needs a nice quiet fishing ground, not the crazy wake boarding, tubing thing my kids want....i forgot to take the engine model number when i saw it and it's a hell of a drive. The guy has it in a garage and can't get me the...
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