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    elbow gaskets

    I'm getting ready to swap out the old log style manifolds on my '79 260 with a set of center riser manifolds & elbows that I picked up off of an '02 6.2 B-3 set up. My cooling system on my 260 requires restricted gaskets which only have a small hole, about an 1/8" diameter, in one of the...
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    busted diffuser ring

    I've got a prop that i'm gonna try on my boat & it has a broken diffuser ring. Split down one side & popped clear off. My boat is a 79 mercruiser 260 with MC-1 drive. I have an exhaust tube on it so the exhaust doesn't exit out thru the prop. Is the diffuser rings only job to keep the...
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    warning buzzer

    My boat did not have any type of alarm/warning system in place when I got it. I ordered one of the Sierra kits that goes off if oil pressure gets low or temp gets high. The only problem is that loud annoying buzzer sound as soon as the ignition is turned on. Can barely hear when the engine...
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    Finding exhaust leak

    Hey all I've got a possible exhaust leak at the rear of the starboard manifold on my 260. It is a 79 & still has the log style an I folds on it & I can't see or get to anything down there without some major disassemble. Can't really tell if it is an exhaust leak or a lifter that's not...
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    Mercruisers revised timing curves

    I had found a list of Mercruisers revised timing curves that I had saved in my phone until it decided to crash & wipe out all my bookmarks. I've searched everywhere & can not find that information. I'm pretty sure it listed a different curve for my setup than what the manual shows but can't...
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    prop question

    I'm getting ready to figure out what prop my project boat needs. I've heard when going from a 3 blade prop to a 4 blade prop that the rule of thumb is to drop one size in pitch. Is this accurate? So far I've tried a 14.25x17 & a 14x19c & it doesn't like to get on plane very well with the 19...
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    will 888 drive fit a 260

    My lower unit on my 260 Mercruiser is cracked & while looking for a replacement locally I ran across an old timer with a 888 drive off of a 302 Ford. How much of the drive is interchangeable with my 260? Just the cases? Everything except the input shaft? Nothing at all? Different gear...
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    marine starter ID

    Rebuilding this 79 Mercruiser 260 & was curious if there is a way to tell just by looking if this starter is a marine unit or not? The label that was on it has gotten wet & fallen off or something. Every other part that needs to be marine approved is but it's also easy to tell the difference...
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    mercruiser 260 fuel line

    Hey guys I have not been on in a while as my boats have not been giving me any troubles. Knock on wood. I picked up a boat a couple weeks ago that unfortunately has a 4 yr old dealer installed repower with 35 Hts on it that the dim wit who winterized it 3 yrs ago left the nut off the flame...
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    warning buzzer

    My 1990 60hp johnson did not have a warning buzzer in the control box. The wires were there but no buzzer. A couple months back, after replacing the impeller, I installed a red led in the helm & wired it to the buzzer wires in the box. It worked but when I was pulling the girls on the tube thru...
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    shift interrupt engaging while in gear

    I know & understand how the interrupt works & why it's necessary. Here's my problem. I put my new cam & lifters in & the head back on this weekend on my '76 140 mercruiser. I think while it was apart the linkage rod that hooks to the carburetor got turned a few times & is out of adjustment...
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    New day, new problems.

    Need a new cam & lifters As some of you know, I've been resurrecting our '76 140 Mercruiser powered Rinker. It just hasn't ran 100% regardless of what I've done. Last time out, it started slowly losing power & then started popping thru the exhaust & the intake. Just a bit at first but by the...
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    idle mixture

    Hey guys, have been over in the I/O department as I'm working on my old ski boat & this outboard has been running great. My question is do the carbs have an adjustable idle mixture or is it controlled by fixed jets? It's a 1990 60hp Johnson w/ vro removed. Serial #TJ60TLESM. It appears to be...
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    throttle shaft issues

    I decided to go ahead & go thru the carb before heading to the lake as I couldn't get it to idle & it's been setting for about 3 seasons now. It's my '76 140 3.0L. Long story short, the heads of the little brass screws that hold the throttle plates in the shaft are broken off & the throttle...
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    140 prop

    '76 mercruiser 140 in a 16 foot Rinker open bow tri-hull. I don't remember what rpm's it runs at right off hand but it has a 23 pitch prop on it. Standard alum. 3blade. Does this sound right for this boat? I've got a couple mercruiser props that are 21 pitch that were off of a older deep V...
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    bellows ?

    I'm getting ready to install my new bellows on my old #1 drive.'76 model 140. I've got quicksilver bellows glue & powertune. I have two questions. 1) which way to install u-joint bellows? New one only has one ground clip on one side of one end. It also has kind of a flat spot on one side right...
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    trim limit switch- #1 drive

    Does anyone know if the trim limit switch is available anywhere? I haven't been able to find it yet. It's the one at the top of the gimbal ring/bell housing area. The #1 drive doesn't have them on the sides. Thanks. Jim.
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    Gimbal bearing & bellows

    I've decided to replace my gimbal bearing & the bellows while I'm doing the water intake hose. For one, I'm sure they've not been changed since new in '76, nothing much else has been, they're not bad but they are old. I figured messing with the water hose I'd tweak something & the bellows would...
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    140 water intake hose

    Noticed a pin hole in the water intake hose inside the gimbal housing. How do you replace that hose? It's a '76 140 pre-alpha #1 drive. I've already got the outdrive removed for other work. I can see where the hose clamp is up at the transom end but can't see where it attaches to the bell...
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    now, to get power to my coil

    I've got two questions regarding getting power to my coil as there are two power sources & they're both dead. It's my '76 140 mercruiser. 1) I've lost power from the key switch thru the resistor wire. I've got power on the wire (white wire) from the key switch to the gauges & coming off the...
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