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    Hour Meter Malfunction

    I have a strange thing happening with my boat, It is a 1991 Thompson 260L Fisherman Hardtop, with twin 4.3 Mercruisers. The boat, Engines and outdrives work great, and my hour meters keep time quite accurately, but if I run the engines out of the water, like in my driveway with ear muff's, the...
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    Hydraulic steering

    I am planning on replacing my cable steering on my 26 ft. Thompson Hardtop, It is equipped with twin 4.3 mercruisers, and is a fairly heavy boat with all the fishing gear. I am going with a Teleflex Hydraulic system and a Simrad ap16 autopilot. My question is- should I leave the power assist...
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    4.3 I/O Merc's

    I have a 91 Thompson 260L Fisherman Hardtop, equipped with twin 4.3 Mercruiser's, My question is what RPM range is good for these motors. Generally run anywhere from 2-6 miles and then set up for fishing from there, may sometimes run up to 10 miles, generally 3800 rpm puts me at about 24 mph...
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    merc. power steering

    I have a 91 Thompson with twin 4.3 Alpha 1's, I am looking at installing a Simrad AP12 autopilot, but will have to change my rack/pinion steering system to a rotary set up. My concern is with the cable steering and only the starboard having power steering, I am afraid the unit will really have...
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    Merc. Paint repair

    I have a 91 Thompson with twin Mercruiser IO's, the paint on them is bubbling in areas and there is some corrosion starting, the boat is kept in the water all season but I really dont want to put anti-fouling paint on them if I dont have to. Is there a type of paint that will hold up if the...
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    4.3 mercruiser

    Have a 1991 Thompson 260 Fisherman with twin 4.3 Mercruisers, wondering how I can tell what Horsepower they are, was told 175, but would like to know for sure, Thanks
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    Hard Starting 225

    Wondering if anyone can help me, last year I chased a mid-range rpm / breaking up problem on my 1986 225 VRO,that ended up to be cracked venturi tubes in 5 of 6 carbs, I rebuilt them, replaced all gaskets and o-rings, gas line and clamps, basically went thru everything to make sure there were no...
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    225 VRO owners

    I learned a very expensive lesson chasing a mid to high rpm miss,And thought I'd share it. Engine ran ok up to 3500 then fell on its face. Dealer checked out carbs (twice) couldn't figure it out and basically abandoned me. Thinking there can't be anything wrong with carbs I tried, coils. cdi...
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    Need HELP !!

    1986 225 VRO, Freshly tuned up, Compression is good, rebuilt carbs, new fuel line, clamps, and primer, new plugs @ .040, linkage sync done, timing set 18 deg. @ wot,( 4deg. atdc @ idle ) starts and idles good, (used to sneeze, shake and stall) runs awesome at mid range and wot, still not the...
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    exhaust backfires

    I have a 1986 225, have been fighting to get it to idle half way decent and not stall, I put carb kits in, replaced all gas line and clamps, and synced linkage, it starts good but I can't seem to control idle, it wanders up and down, there is some play in linkage but not real bad,now it sneezes...
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    another 225 question

    have been trying to get my 225 to idle a little better ( I know thats not always possible ) have been chasing a possible air leak in system, can't seem to find any problems, so I started over with my linkage, timing synchronizing, I noticed when I pull just a little on the linkage wich advances...
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    fuel filter empty

    When idleing my 86 225, the primer ball is soft and the filter only has a minimal amount of gas in it, as soon as I start to advance throttle there is no response for about 5 seconds, then the rpms pick up and it runs great. replaced primer bulb and fuel line, clamps, checked everything I could...
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    jet sizes

    can anyone tell me why I have #14 idle mixture bleed orfices on 5 carbs and a # 48 on the # 1 carb ??? This is on a 1986 225 VRO. Intermediate orfices are #20on all 6.
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    1986 225 carbs

    Was just going through carbs on my 86 225 vro, been having a problem when I start accelorating theres a 5-10 sec. period when it won't do anything, then the rpm start climbing as normal and runs great, I don't think this is the problem, but I'm curious if it's correct. All carbs have a #14 bleed...
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    225 VRO -Air ???

    My 225 runs great at higher rpm (2000 and up )but sounds like an old JD 2 cyl at idle and 1200 when idleing out of harbor, now the last 2 trips out, when I go to wot it will just lays there for 5-10 secs. ( I tried to pump fuel buld but by the time I got there the rpm's were already coming up)...
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    86 Johnson 225 VRO Carbs

    Been chasing a high RPM miss for quite some time, checked everything possible electrical, stator, timer base, coils, wires, cdi boxes, shift switch, harness's for possible shorts, fuel tank, lines, vent, bulb etc... my dealer went through carbs last fall, all this and still the same, 3500 rpm...
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    1986 Johnson 225 VRO

    1986 225 vro won't go above 3700 rpm, starts and idles fairly well but once you hit about 3700 it flattens out and won't climb any more, misses and flutters, have chechked everything possible, stator and mag base both ok, went through carbs and found a few small problems but still no...
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