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    200 EFI struggles to get on plane

    I have a 98 Merc 200 EFI and it has always ran great. One time I used it and it was just fine. The next time I used it I had this problem.. Starts and idles fine. When you go to get on plane it takes a very very long time. Eventually it will get on plane and run just fine. If you take it off...
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    Power question. HDS-7

    I just picked up a 1998 Nitro and it has a Lowrance HDS-7 on the console. The boat has two batteries solely for the 24v trolling motor and a third battery for cranking and everything else. When the engine is running down river, everything works fine. However, when you turn the big engine off...
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    Choke questions

    Engine: 1978 Merc 500 Controls: Black 2 lever Mercontrol I am gone through my manual and cannot figure out some things with my choke. First. My electric choke button on my Mercontrol won't work. I tested the solenoid by using a jumper from the starter solenoid and the plunger rose up as it...
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    Mercury Thunderbolt tach help

    I have a 1978 Merc 500 with the thunderbolt ignition. I also have the Mercontrol with the tach plug on the front of it. Any idea what tach and harness and I need to work with my setup? Thanks Sam
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    Mercury 500 questions

    I purchased a Merc 500 in unknown condition. I brought it home and took off the lower unit to find the impeller in decent shape but not perfect so I replaced it along with all the water pump gaskets. I then filled the lower with new gear lube. Moving up to the powerhead, I noticed the starter...
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    Merc 500 Revival

    So I got a really good deal on a 1978 Mercury 500, 4cyl, 50 hp outboard. I got had an old gutted out boat and trailer with this engine. I just wanted the engine since my boat has a out of service 1972 Merc 402. He wanted it gone so he offered it all for $100. I purchased it of course and then...
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    Installing fish finder

    It says to mount the transducer 1/8" below the transom. My transom extends down and then at the bottom edge, cuts in towards the bow a few inches. It then extends down a few more inches. This is where the drain hole is. Do I need to mount it so that it sits 1/8" below that portion or just the...
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    Poppet valve assembly?

    I purchased a Merc 402 and it had some overheating problems. When I popped the transfer port cover I found that the t-stat was toast and the entire poppet valve group was melted. I just got the new parts in and cleaned out the housing of the melted plastic. I want to install the new parts, but I...
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    Classic Lowrance Depth Finder info needed

    I purchased an older bass boat last summer and it came with this huge depth finder on it. The only info that I see on it is "Lowrance 2060". It does not have an LCD screen. It simply has a ring of numbers and a red light that will move to the depth that you are in. It seems to work just fine. I...
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    Mercury 402 questions

    I purchased a boat last summer with a 40hp 2 cylinder 2 stroke 402 Merc on it. I have never owner a boat and know nothing about outboards. I am decent with a wrench though. The engine had some overheating problems and sputtering. This winter I have been trying to fix everything so it's ready...
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    Purchased used Mercury 500

    I just purchased a used Mercury 500 50hp 3 cylinder for a pretty good price. The only problem is that I have no idea what condition it is in. I popped the cover and VISUALLY it looks clean and in good shape. It came with no controls or anything, but has tilt/trim. I have a Mercury 402 40hp 2...
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    First time boater needs help

    I just purchased my first boat and it has a older Mercury 402 2 stroke 2 cylinder. Not sure of the year but the serial is 3727480. I couldn't figure out those websites that help you decipher your year by S/N. I took it out for the first time to see how it ran. All was good at first. After...
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    How to select prop

    I just purchased my first boat and the prop that came on it is in pretty bad shape. Having it machined is out of the question. The engine is a Mercury 402 40hp and I am unsure of the year. The previous owner told me that it was a 1986. I am unsure of where to locate the serial number plate to...
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