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  1. S

    98 Merc 200 outboard power head stuck

    Been thru this once with a parts motor and wound up drilling thru the case and thru the studs to cut them in half. Don't want to do that with this motor, anyone have any tricks for separating the power head from the mid section? The studs pass thru two plates and then the mid section, where are...
  2. S

    Counter rotating outboard questions

    Is the only difference in the lower unit? Can a counter-rotating lower unit be installed in place of a regular rotating lower unit? Without any changes to the rest of the motor?
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    98 200 Merc Outboard Running Cold

    On start up from sitting a couple months, my 98 Mercury 200HP outboard wouldn't come up to temp. I noticed that the tattletale indicator flowed immediately on start up where before it seems there would be a delay (I always thought it ran after the T-stats opened). Checked the T-stats and they...
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    200 Merc overheating, erratic water psi, prop & poppet questions

    While running close to WOT, the RPM increased and shortly afterwards (20 seconds) it overheated. The motor was jacked and trimmed up a little higher than normal so thought that was the problem. Now it seems to maintain good water pressure & run normal temp at mid throttle but when close to WOT...
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    1980 70 HP Johnson exhaust gaskets, if sealant is used what is best?

    1980 Johnson 70 HP. I have a set of new gaskets but they are old and the factory sticky film on them is no longer sticky. Is there a sealer I can spray on the gaskets (3 total: exhaust manifold plate, manifold and manifold cover) that will withstand the heat at the exhaust ports and of the water...
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    Can someone identify this lower unit? How can it be confirmed?

    I am use to older (70's and 80's) omc 3 cyinders. This lower unit looks very similar to OMC. It has a 20 spline drive shaft (as opposed to the 4 spline on my OMC) but a 13 spline output shaft that will accept an OMC prop. The shift rod has a kick instead of an offset like my OMC. I had a Suzuki...
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    Can someone identify this lower unit? How can it be confirmed?

    I am use to older (70's and 80's) omc 3 cyinders. This lower unit looks very similar to OMC. It has a 20 spline drive shaft (as opposed to the 4 spline on my OMC) but a 13 spline output shaft that will accept an OMC prop. The shift rod has a kick instead of an offset like my OMC. I had a Suzuki...
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    1998 200 hp oiling system dependability?

    I hear the drive gear on the crank for the oiling system pump is plastic and that it is common for them to strip out. I am faced with replacing a $100.00 sensor to get the warning system to work. The service guy recommends to abandon the oiling system and put the oil directly in the tank at 50:1...
  9. S

    Decals needed for a 1998 200 HP Mercury outboard

    Been looking on line and can not find the exact ones that were on my motor. Not critical they are exact but would like to get close. Any good links on where I might find a better selection?
  10. S

    MPG to expect on a 1998 200 HP carbuerated outboard on a 22' boat

    I will experiment with it to see but wonder if someone can tell me how many miles to the gallon I might expect to get on my boat to get a feel for its range. It is a 22' V-hull fiberglass boat. Dry weight of the boat is about 1800 so total with motor and people is going to be 3000 or so. The...
  11. S

    98 200 hp oil warning componant troubleshooting

    I have narrowed an oiling syst I have narrowed an oiling system problem down to either the module or the shaft rotation sensor. Is there a way to troubleshoot either of these to eliminate one or the other or is it better to replace both? The horn beeps three times and stops when the key is...
  12. S

    1998 200 hp Merc oil pump warning

    I have a pulsing beep indicating a problem with the oiling system. What is most likely the problem? How many sensors are on the oiling system?
  13. S

    1998 200 hp Mercury outboard tattle tale water stream

    My motor only p's water wh My motor only p's water when the thermostats are open. I can see the water pressure gauge move slightly when idling so I can tell its pumping. Can I hook the tattle tale line to the same hose as the water pressure gauge so it p's all the time? Or is it supposed to be...
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    Mercury prop question 1998 200 hp

    "I finally got my boat in the "I finally got my boat in the water and have not looked at the prop closely to try and figure how these merc props work (I am use to OMC and Yamaha). It is a Mercury Marine Bravo 3 blade stainless prop. I put it in gear to tow the boat and when I checked to make...
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    Gapless plugs on my 1998 200 HP is there a reason Is this the plug to use

    "I just purchased this boat/motor (1998 200 HP Merc carbeurated) and it has those plugs in it that are flat on the end less the little arm over the electrode. When I saw them it came to mind that the previous owner might have installed them to overcome a fouling issue maybe? I will change...
  16. S

    How to remove the tilt cylinder top pivot pin on a 1998 Merc 200 HP

    "1998 Mercury 200 HP. I want t "1998 Mercury 200 HP. I want to take the top pivot pin on the tilt cylinder rod out to lubricate it while I replace the trim sending unit that is bad. I see what could be the keeper (has a nail like head) but it does not move easily to pull or unscrew. Does it...
  17. S

    Electric fuel pump selection for 1998 200 HP Mercury

    "I will install an electric fuel pump to overcome my priming issue. I have a 1998 200 HP Mercury carbureted motor. Any suggestions on which pump to purchase? Thanks, Kevin"
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    Fuel pump suction thru anti siphon valve 1998 200 hp

    "My tank is in the hull and the fuel line is uphill all the way to the motor (1998 Merc 200 HP carbed outboard). I installed new 3/8" fuel line with a primer bulb nearer to the motor (12' from the tank). Once primed, no problem but when shut off, the fuel in the line drains back into the tank. I...
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    Carb jet question 1998 200 HP Mercury

    "Two of the jets on one carb a "Two of the jets on one carb are different, I just figured they would be the same and took them both out and now need to figure which one goes where. I am not sure what these jets are called but have attached a picture. Can someone tell me where the larger of the...
  20. S

    1998 Mercury 200 HP cold rev at start

    "I ran this motor at idle for "I ran this motor at idle for about 10 seconds for the first time in three years. The next day I wanted to do a cold compression test but rather than spinning it dry, I thought I would squirt mixed gas in the carbs to lubricate the bearings before pulling the...
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