Recent content by fluidjuice

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    25hp 2 stroke mercury water pump change

    Hi all was wondering if anyone out there had a diagram and or instructions for changing the water pump on my 2006 engine serial number op401816, first time it has been done since i bought last year only used it this season. Thanks
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    25hp merc prop ??????

    I have just bought a 2006 two stroke 25hp mercury with an aluminium 10" by 13pitch prop(factory standard), Its on a 14foot 4 inch tri hull fibreglass day boat. At wot with just me on it i was getting around 4700-4800rpm ( manuel says 5000=6000) so far i have changed it to an 11 inch pitch and...
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    rattle at 2800rpm

    I have just bought a second hand 25hp 2006 mercury two stroke that has only been used for an hour before i had it, so i am now breaking it in (about 2hours into it, no more than 3000rpm on double oil. only Today i have noticed that the engine starts to vibrate /rattle as i hit 2800 rpm's then...
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    correct break in procedure mercury 25hp two stroke?

    I have just bought a second hand 25hp 2006 mercury two stroke from a dealer who said that it has not been used for more than an hour! He's told me to run it in on double oil that is 50-1, as normal would be 100-1. He said not to hit wot untill a full 5 gallon tank had been used ,at no more...
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    Bottom cylinder locked up flywheel wont turn????

    Hi all, I didnt think i would be back so soon after all you guys help last year ,anyway i have a Mercury 1991 4 cylinder 40hp classic that has been converted to manuel oil in fuel. Boat has been running great regualry , starts first time and been very reliable,pumping water fine. I took it out...
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    lower unit oil capacity

    i have a 1991 40hp 4 cylinder merc ive just drained down and refilled lower unit oil, in my manuel it states that the oil capacity is 370ml , i could only get about 270ml in max. i removed both plugs to drain, and filled from the lower plug untill oil came out of the top plug,replaced lower plug...
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    engine stopped no spark

    I have a mercury 1991 40 hp classic my problem is the engine has been running fine all season, swapped it to my new second hand fishing boat and started it first time on muffs. went to test it in the water and flattened the battery trying to start it , So i checked spark and found no spark...
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    Drain plug discharge

    Could some one tell me how much water is acceptable to come from drain plugs when they are undone ,After about 2 hours in the water today i must of had about 2/3 litres of water drain out when plugs were removed, is this "NORMAL" or should i be worried about a crack in the hull or worse. any...
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    Low rpm's is it the prop?

    I have a mercury classic 40 hp 1991,on a 14ft speedboat wired up a new tacho and found the rectifier needed replacing, done that and now it works , so i took it out for a spin at wot and im only getting 3000rpm's at wot. The prop i have on is a mercury 10 inch diameter , 3 blade with a 13 inch...
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    tacho problem

    Tacho wired as per manuel grey to send , ground to black and ignition to red, when ignition is turned on tacho needle drops to 0. batery shows 11.9 volts with multimeter when turned off on key and 14.80 volts when engine running so i am presuming regulator working and engine is charging battery...
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    Fuel leek from throttle shaft??

    Engine started hard today in water, but fine on muffs. ran great for about 1 hour ,dropped rpms to idle into harbour and engine stalled, took of cover and found fuel dripping from bottom carb from the throttle shaft the bit with the small spring on. tied up kept cranking with no luck managed to...
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    Is this the fuel pump???

    Mercury 1990 40hp oil injection.4 cylinder twin carbs I have been having a lot of the same problems ie been going round in circles for the last month. so i need someone with a clear head to refresh me and give me some straight info. when under load engine stalls when put in gear and revved...
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    No lower carb adjustment

    Mercury 40hp 1991 4 cylinder 2 stroke. Problem pressure test good spark good now runs on 4 cylinders carbs have been cleaned Both carbs suck well But i have no adjustment on bottom carb at all. If i spray fuel/oil mix into top carb it stalls if i spray fuel/oil into bottom carb it picks up...
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    water from top mounts

    if i have water coming out of the top mounts( all be it not a massive amount) nearest steering loom when running engine on muffs or in water what does this mean and would it relate to my engine only running on 2 of its 4 cylinders, even though engine has good compression and good spark on all...
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    Only running on two cylinders

    Hi i have a 40 hp classic mercury 1991 4 cylinder , It idles fine on top two but when you put in gear and give it some revs it stalls every time, this is done in the habour so it has enough back pressure. The bottom two cylinders dont seem to be running at all so i took it to have carbs...
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