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    Prop mercury 500 thunderbolt

    Re: Prop mercury 500 thunderbolt Sorry, Didn`t checked the rpm`s if they are correct, but I have been able to remove my prop from the shaft! but now I have a question about that. It was really stuck and i ended up removing the hard way.. now i have everything except 1 pcs. Could you tell me...
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    Prop mercury 500 thunderbolt

    Hello, i recently busted my prop on some rocks down the river:facepalm:. Now I`m looking for a replacement. I`ve found one on the internet from a nice guy. The prop is from a 50 hp mercury from bj 2000 also a 2 stroke. My motor is a thunderbolt 500 from '78. The prop numbers from him are a...
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    Merc 500 rpm problem

    Re: Merc 500 rpm problem A little update with an photo. This is not how you want your coil to look. Anybody else had this problem?
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    Merc 500 rpm problem

    Hi guys, i`m going crazy over my 500 thunderbold 50 hp. When she is cold she runs like hell (5500-6000). I then get the idea that i`m using all of the 50 hp. But when she is warm she holds back and won`t turn more then 4700 rpm with a lot less power. What can this be? Is it an compression isue...
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    Merc 500 holds back when warm

    Hi guys, When my merc 500 thunderbold is cold she runs perfect! With 3 people on board she runs up to 5100 rpm in a hartbeat. But when the motor is warm, the motor holds back. It takes a lot longer to get up in plane and tops at 4700 rpm. Also when i hit the throttle the motor holds back for a...
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    merc 500 thunderbold wont start, pls help!!

    Hello, recently ice cleaned my carbs and gastank bcs 1 carb was dirty. Now my engine wont start! It start and immediately shuts off...Very weirt, after starting a while and adjusting the throttle she started and ran good! So I shut off the engine and treid again...and she didn't started just...
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    mercury 500 wont get rpm anymore

    Hello guys, Yesterday i was cruising with my boat. I have an mercury 500 thunderbolt. This was the first run for this motor in about 2 years. Motor is from mid 80s. The motor ran perfect for around 1.5 hour. Then suddenly during full throttle the motor dropped rpm with an bwaaaaap sound. Like...
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