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    idling speed solution needed

    Hi, out there, can anybody help me with following problem. I have small open deplacement boat (16 ft) with inboard diesel (Sole 15HP), turning shaft and ending with 15x10 in propeller (3 blades). Now, the engine at idle gives too much power to the prop, and the boat runs at appr. 2,7 kts. During...
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    material for transom plate

    Hi there, I am in the process of building a new boat (21 footer) out of fiberglas (GRP). The traditional method for making the transom plate for outboard is GRP-plywood sandwich. owever, this has its drawbacks in form of water rotting of the wood through he motor holes and such. Does anyone...
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    mercury 500 powerhead to 600 lower unit

    Please, Help me with this. I have a repaired mercury 500 powerhead, and need to change lower unit from 15 to 20 inch. I cannot find any 500 long lower units here in Croatia. Can a lower unit of merc 600 be used, and does a base of 500 fit to it. i cant seem to find the look of gaskets or lower...
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    mercury 500 1975 gauges

    Hi there, does anyone knows which instruments, like rpm counter can I install on Mercury 500, made in 1975. Thanks in advance, Niksa
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    submerged 500

    Hi there everybody, I have a Merc 500 made in Belgium in 1981. Recently, due to my lack of care the engine was submerged for a couple of days (40 or so hours) in brackish water. Now, I have cleaned the engine as soon as I got it out of water, rinsed it with diesel fuel completely, dried the...
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    prop selection for twin outboards

    I have a prolem with propping a 15 footer. The boat is some 1200 pounds with twin mercury 500's on a stern bracket. If propeller selector says that for 16 foot, and some 1600-2000 pounds of gross weight single mercury 500 would require propeller 12" x 11", does that rule of thumb changes with...
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    twin outboard problem

    When operating a twin merc 500 on a 16 foot boat with a transom bracket, left engine was a lot hotter than right one (some 20 degrees centigreade). A mercury serviceman told me that in twin configuration one engine always gets hotter, and it is probbably because the outboards are with the short...
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    mercury 500 cooling

    I have a Merc 500 made in belgium in 1981. When operating at higher speed for 20-30 min. it starts to run steam on tell-tale pipe. It runs water normaly there just to the moment when the vapor starts. When i kill it, and start it a few minutes after, it starts normaly, except that steam starts...
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    twin outboard benefits

    I am planning on fitting a 16 footer with two mercs 500 on a stern bracket (appr. 20 in setback). With only one of these outboards i can get some 23 mph (12x11 in. propeller), and I am going to fit the two with 11 3/4 x 13 in. propeelers. Am i going to get some power, thrust, or speed, and if...
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    propeller removing

    Hi, can a frozen propeller be removed from a shaft by heating the rubber hub, or does it have to be cut?
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    Throttle lever dropping

    When given more than 50% of throttle, my mercury 500's throttle lever seems to drop constantly, and boat slows down. Otherwise, when i hold the throttle lever pressed on a certain point, the boat (16 footer) is planing, and otherwise going fine. Could it be something with the lever tightening...
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    Faria tach on Mercury 500

    I bought a Faria marine tacho, and tried to hook it up on my Mercury 500 (50 hp) from 1975 (Belgian made). I hooked it on a signal point on the switchbox in the motor (blue point), but nothing happened. The engine is not wired to the battery, but I connected the battery to the tacho instead...
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    Sealion electric windlass

    Respected, I am searching for a chain length counter (in meters) for a Sealion electric windlass made by Simpson and Lawrence Ltd, Glasgow. Please tell me of source for ordering. Thank You in advance.
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    Sealion electric windlass

    Respected, I am searching for a chain length counter (in meters) for a Sealion electric windlass made by Simpson and Lawrence Ltd, Glasgow. Please tell me of source for ordering. Thank You in advance.
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    Sealion electric windlass

    Respected, I am searching for a chain length counter (in meters) for a Sealion electric windlass made by Simpson and Lawrence Ltd, Glasgow. Please tell me of source for ordering. Thank You in advance.
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    twin outboard engine

    When installing a twin outboard engines on a stern, or a stern bracket, does the position close to the center or apart towards the sides of the boat make any difference in terms of speed, manuvreability?
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    tachometer installing

    I have an 1975 belgian mercury 500 (50hp), manual start, thunderbolt ignition which i want to equip with a tachometer. Faria tachs are available in Croatia, and i wonder how to make the connections to the motor. The tach has signal pole, battery positive and a ground, as well as the light...
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    twin engine mounting

    Respected, I am planing to mount second Mercury 50 hp outboard on my boat. Dos the second oe have to spin the propeller in opposite direction, or can this be done only with the certain propeller?
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    transom bracket

    Does transom bracket for outboards work with boats of 16 feet (5m), and will it improove the handling?
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    mercury splashes water when gliding

    I have equipped an Elan plastic boat (16 ft)with 1975. Mercury D500 outboard, which runs fine, but when running fast, gives two strong jets of water, just over the sides of the shaft, diagonnaly upwards. Also there is some water entering the engine well on the stern, just over the steering...
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