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  1. D

    antifreeze on cylinders

    I bought a 1981 Glasply with a 165 inline GM FWC. I was told he bought the Boat with a new rebuilt long block. Sitting 10 years and never in the water since he bought it. I took it out and it seemed to run fairly good. I could feel a slight stutter but not serious. Ran it around 10 minutes...
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    Engine shuts down after 15 minutes

    Hi guys My 3.0 l 140 starts fine when cold and runs fine for 15 minutes give or take a few minutes. I keep the rpm around 3000. Starts to sputter then finally dies. It starts fine when it cools down. I did find corrosion in the wiring harness coupling which i cleaned up. Temp gauge reaches...
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    points burnout

    I found a pin that had a lot of corrosion and rust on the wiring harness plug. I hope this was the problem. getting ready to do on the water test.
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    points burnout

    1977 Glasply 3.0 l 140 GM. I have been burning up points and even tried a electronic ignition with no luck. All seems ok and will run fine until i hit a big wave that gives a jolt, then in about 5 minutes she will start stuttering, missing, and losing power until she will finally die all...
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    1977 pre alpha mr upgrade to alpha 1 ?

    Have a 77 mercruiser with mr outdrive ser # 4535567. My mechanic informed me that the clutch assembly in the lower unit is worn causing hard shifting problems. can i use a alpha 1 lower unit in place of my old pre alpha? Or would i be better of replacing the upper and lower units to alpha 1 if...
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    electric fuel pump Vortex V6

    Engine has been inactive around 7 years. Fuel pump not working. Could this be a sending switch stopping current to pump? With key on no voltage. 2002 4.3L V6 carbureted Marineengine.
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    Old fuel, new engine

    HI I just purchased a 84 StarCraft 17 ft. sled with a new 4.3l v6. Well it was new in 2002 and with no hours on it. Been in a garage since then. I removed 15 gals of old gas. Anything else I should do before I try to start it? It is a marinepower engine and 2 stage pump. thanks in...
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    shift and trottle control

    I own a 1977 19 ft Glasply with a merc 140 hp 3.0 l gm merc I/O. I would like to upgrade the shift and throttle control. It is a side mount. I see a few available and claim to work on inboard and outboards. Can I keep my old cables and they don't specify if I can use my two wire...
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    Carburator steam

    Took boat out for first shake down run. Ended up with steam pouring out of carb. I got it up on plane around 2000 rpm, temp running 150 never changed, had dog house open and noticed, I thought oil smoke from leaking valve again, light steam at that time. Tried more rpm's and around 2500 then...
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    Breakin Oil

    I installed a 3.0 L remanufactured long block. I ran break-in oil for 15 minutes 1800 rpm as was instructions for break-in, but dumped the oil right after and replaced with a 30 weight oil. Well I went over the paper work again and miss read the instructions. Dump break-in oil after 500 miles...
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    3.0 inline 4 FWC pumping atifreeze out through the overflow.

    Thanks for the reply's, It doe's have a reservoir, I will try a new cap. I posted a pic of what I have.
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    3.0 inline 4 FWC pumping atifreeze out through the overflow.

    I have a 1977 glasply FWC inline 4 I just replace the engine with a remanufactured long block. Put it in and fired it up ok but when the thermostat reached 140 and opened antifreeze started pumping out the over flow. , I didn't have a hose on the overflow and pumped all over the engine. Anyone...
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    Oil leak Pan or rear main?

    I have a 1977 140 GM engine. It has been sitting for 17 years, I fired it up and found a oil leak. It looks to be coming from the rear of engine or oil pan. I am getting ready to pull the engine and not sure where the leak is. I lost around a 1/2 cup of oil after running 15 minutes. How can I...
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    1977 GM140 thermostat question

    I am a little confused on the proper thermostat to use and trying to find the one that is recomended has not worked. According to Clymers manual I should be running a 140 degree thermostat in my GM 140. So I ordered a 140 degree for a GM 140 3.0L(18-3550). The one I recieved Is not for my...
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    Exhaust Bellows mcm 1997 140

    The engine I am working on is in a 1977 Glasply. MCM 140 181 CID serial 4649529. I bought this boat as a project. It has a cracked exhaust elbow. After I removed It I see that the exhaust bellows was in bad shape also. After I removed It I found the exhaust Elbow assembly was ate up with...
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    Alpha Drive locked up

    "Hi I just bought a 20 Glas "Hi I just bought a 20 Glasply cuddy. This boat has been sitting since 1993 and has alot of minor repairs to do. This Is the mcm 140 with (I believe) a Alpha Drive. Before I started the engine I tested the shifter and It moved to the forward position and...
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