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    Suggestions on how to fill my onboard gas tank?

    Jimmbo, You might want to correct your post to say that even idle requires some small amount of oil mixed into the gas for carb 2 cycle motors. If you have evidence of 2 cycle motors with carbs running on straight gasoline, I would like to see it. Modern engines need 50::1 or maybe a bit...
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    How to run PTT wiring thru 1998 OMC control handle.

    The red locking lever on my 1998 OMC concealed mount control handle fell apart after all these years of sun exposure. I purchased a new one, but am having trouble finding the correct path to route the PTT wiring from the thumbswitch in the handle past the locking lever to the handle base...
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    1989 Mercury 200 Black Max Maintenance

    You can use any TCW-III 2 cycle oil. Some have found that Seafoam mixed into the fuel helps clean up the carbs a bit. I would not expect miracles. Make sure the overheat alarm works. Rebuild the waterpump with a new impeller, wearplate and 2 gaskets. If the pump cover SS liner is...
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    Power trim Wire, 2 or 3?

    Gee, the PTT trim unit has 6 heavy stainless bolts holding it to the transom bracket. I do not think it needs a ground wire. A lot of Mercs did not have trim senders, but if you have one, you should see the body of it inside the transom bracket, and it will move with the trim of the motor...
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    Suggestions on how to fill my onboard gas tank?

    Gee, I cannot read all the posts. Likely some have been duplicated. It is real simple. Mix the fuel every 6 or 12 gallons. So get some pint or quart containers. Dump in a pint of oil, fill with 6 gal of gasoline, repeat with gasoline, and oil. when you think you are close to full, do 8 oz...
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    Year and ignition

    The Maxrules site lists it as a 1976. If you take off the wrap cowl and see a distributor it is a few years older. A 1976 850 would have 4 ign coils. I disagree that it is heavy for 85 HP. It will push your boat nicely. Two strong people can lift that motor onto the transom. Balance the...
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    2022 lower unit compatibility chart

    See what the SEI site (sterndrive engineering) says. They sell new gearcases for most popular outboards and sterndrives.
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    Boat cover waterproofing

    Ideally you want some UV protection as well as waterproofing. I am not sure the 303 gives that. If not, I would use some generic scotchguard product, as the price is much lower.
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    Troublesome motor??

    I did not think Johnson made 4 cycle OBs in that year. They did make very good 2 cycle motors with good oil injection and multiple carbs.
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    Engine Won't Run When Warm

    My 1998 Johnny 150HPV6 (6 carbs) does that whenever you run it for a while and turn it off. It idles rough for a few minutes but will idle. I usually let it run for a few minutes at high idle and then she will clear out and run fine. I think it is a slight overheat issue. You might...
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    Repainting 1995 Crestliner Phantom But Leaving Bottom Bare

    You plan to trailer it, right?
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    Shifting problem

    MerCruisers usually have an upper and lower shift cable. The lower shift cable is a bit tricky to install as it needs to be threaded thru the shift cable bellows and the bitter end installed. A service manual is a good idea. The upper shift cable and throttle cables are more straight...
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    Lower unit compatibility

    https://www.sterndrive.cc/Mercury-Mariner-Force-Outboard-Lower-Unit.html
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    Lower unit compatibility

    It is probably best to retain your gear ratio and gearcase size. Merc driveshaft length are usually not adjustable. So you need to order the correct driveshaft length and ratio plus the size of the gearcase. On an unusual event, I had swapped a 1993 Merc V6 25" 5" extension for a 20"...
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    Lower unit compatibility

    Why not go on the SEI website and see what gearcase models fit your motor, as well as other models? It is likely that V6 gearcases from the late 70's to the early 2000s will fit, but you need to check. You will want to know your gear ratio. 2::1 is most common, but there are others as well...
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    Trim sender

    If the outdrive is a MerCruiser, replacing the trim sender is pretty easy. It should just be a couple of screws and a couple of wires to splice. Senders are simply variable resistors. MerCruiser is kind enough to place them where they get wet and rot out. I would inspect yours first...
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    Marine or Auto oil pan

    I had the same issue in my 4.3LX. The pan rusted thru, leaking all the oil into the bilge. I had the boat towed to the ramp and put it on the trailer. I then built a "old west-style" hanging scaffold. 2X4s for the legs and a double 2X8 for the beam. Remove the 2 bolts and 2 nuts, and d/c the...
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    Fuel Water Separator

    Gee, I do not like the look of either sample. Does the dark gas smell fresh? It looks to be quite old.
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    Ratcheting RG-45 crimpers or regular

    A lot of those cheap hand crimpers will tear the connector plastic. This allows moisture into the connection which limits their lifespan.
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    Voltage rectifier

    CDI electronics, Sierra and GLM make aftermarket parts that are pretty good. They are about 1/2 the price of OEM, and they still make some parts that are out of OEM production or at least the OEM version is in short supply.
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