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  1. mrsaundep

    Shift interrupter blow ignition fuse

    Mercruiser 3.0, MCM 140, No. 5568367, 1982, Alpha one (Boat maker Sealine) Every time the shift interrupter switch closes (either when shifting or by manually switching the arm on the switch) the engine stalls (as it should) but the 20A fuse in the ignition circuit (starting key) under the...
  2. mrsaundep

    Mercruiser 3.0 - Engine wont idle, hunts, and then stalls below 1200rpm

    Mercruiser 3.0, MCM 140, No. 5568367, 1982, Alpha one (Boat maker Sealine) Sorry for the long post but I’m at the end of my knowledge/tether and want to give as much info as possible in the hope that some of you knowledgeable guys can help me to solve this. The existing Carb (Rochester 2BBL)...
  3. mrsaundep

    MCM140 - Auxiliary Hot Water Heater installation question

    Mercruiser MCM 140, 3.0L, #5568367 I want to fit a cabin heater to my boat, to be run off the engine raw water cooling ?open? system. I have surveyed the installation before I have purchased the components and found that the water circulating pump is not OEM and does not have the fitting that...
  4. mrsaundep

    Fuel Supply problem?

    MCM 140, Serial number, 5568367, Alpha 1 (Further to my previous post July 30th 2012 01:35pm, where I installed a new Delco EST distributor kit as the previous distr bushes were worn. I also rebuilt the carb with a repair kit as it was full of crud, Installed new fuel/water separator, new...
  5. mrsaundep

    EST ignition installation on Mercrusier 3.0L

    Re: EST ignition installation on Mercrusier 3.0L I have installed the EST kit fully, including the cut out switch, set base timing, and all appears o.k on the timing front. However, I still had a problem with idling speed, so, I bit the bullet and stripped / rebuilt the carb myself. Followed...
  6. mrsaundep

    EST ignition installation on Mercrusier 3.0L

    MCM 140, Serial number, 5568367 Good day, Further to previous post July 11th, 2012, 01:09 PM... I purchased the 3.0L Delco EST distributor kit from Michigan Motorz as recommended on above post by Don S. I have finally received the parts from the States and got round to start the...
  7. mrsaundep

    MCM 140 dwell

    MCM 140, Serial number, 5568367, with Delco Distributor I rebuilt the engine last year after a core plug popped out. This included work on the ignition system such as new distributor cap, all leads, points & cond, rotor, plugs, and a full tune up as per manual #3 including setting the dwell and...
  8. mrsaundep

    Does my Carburetter require overhaul?

    Mercruiser, MCM 140, Serial number 5568367, Alpha 1, Serial number OB656591 I removed, overhauled and refitted the engine and sterndrive myself after a core plug blew out behind the flywheel. Fitted loads of new parts (including a new core plug ofcourse), incl. bottom end bearings, piston...
  9. mrsaundep

    Alpha One new shift cable - what is this part??

    Hi, Mercruiser, MCM 140, Serial number 5568367 - Alpha One No. OB656591. Just got the bellows and bell housing assembly all fitted nicely and am now ready to install the shift cable core wire and kit.... I have a new shift cable kit from Quicksilver, the problem is there is one small plastic...
  10. mrsaundep

    "Running In" procedure after major overhaul

    I am installing the following engine back in my boat tomorrow following a major DIY overhaul; Mercruiser, MCM 140, Serial number 5568367, Alpha One #OB656591. I removed the engine as it was "seized", it turned out be a popped core plug trapped in the flywheel (report on other posts). Whilst out...
  11. mrsaundep

    "Mer Control" throttle / shift control - diagram?

    Does anybody have a link to a drawing / information on a Mer-Control throttle/shift control lever unit as per attached photos? I cant anything in my manuals (#3 and #6). I want to open and inspect / service mine as I found during use at certain lever positions, if I did not hold the handle it...
  12. mrsaundep

    Mercruiser 140 - Hydraulic valve lifters / valve clearance

    Hi, I am rebuliding the following engine; Mercruiser, MCM 140, Serial number 5568367. I have refitted the hydraulic valve lifters, push rods, rocker arms, and started to set the valve adjustment as per manual #3 (at TDC, back off nut until lash is felt at push rod, tighten until no lash is...
  13. mrsaundep

    Mercruiser 140 piston rings

    Hi, I am rebuliding the following engine after she popped a core plug and I tore her down fully to check the block for cracks; Mercruiser, MCM 140, Serial number 5568367. After finding no cracks, and cleaning and calibrating everything (all calibrations are in spec as per manual) I ordered...
  14. mrsaundep

    Mercruiser 3.0L core plug

    Mercruiser MCM 140, 3.0L, #5568367 Pulled the engine for various reasons (leaking front oil seal, worn engine mounts, and then after the winter engine would not turn over). Got the engine in the workshop, filled the cooling system up and had a leak from behind the flywheel. Pulled the flywheel...
  15. mrsaundep

    Gelcoat filler

    Hi, I am attempting repairing minor scuffs, scratches, chips and crazing on a fibreglass Sealine 20' motor boat, around 20 years old. The Gelcoat finish colour is white. The surface beneath the white is red! There lies the problem. I have ground out the chips, masked off with tape, filled...
  16. mrsaundep

    Gelcoat filler repairs - finishing?

    Hi, I am attemting repairing minor scuffs, scrathes, chips and crazing on a fibreglass Sealine 20' motor boat, around 20 years old. The Gelcoat finish colour is white. The surface beneath the white is red! There lies the problem. I have ground out the chips, masked off with tape, filled with...
  17. mrsaundep

    Gelcoat filler - finishing problems

    Hi, I am attemting repairing minor scuffs, scrathes, chips and crazing on a fibreglass Sealine 20' motor boat, around 20 years old. The Gelcoat finish colour is white. The surface beneath the white is red! There lies the problem. I have ground out the chips, masked off with tape, filled with...
  18. mrsaundep

    Removal of harmonic balancer

    Engine Make Mercruiser Model MCM 140 Serial number 5568367 Displacement 181 CID I am Trying to pull the harmonic balancer off the crankshaft free end to change the leaking oil seal behind. Engine is pulled and in workshop. I have a balancer puller that fits perfectly. Trouble is it wont come...
  19. mrsaundep

    Alpha One - non return valve???

    Hi, Engine Make Mercruiser Model MCM 140 Serial number 5568367 Displacement 181 CID Stern drive Make Mercruiser Type Alpha 1 Serial number OB656591 After removing the sterndrive from the bell housing, a part dropped out of the sterndrive onto the deck as I carried it into my workshop. I did...
  20. mrsaundep

    Alpha One - clearance of driveshaft tapered roller bearing assembly (item 21)

    Hi, I am new on here. I bought a boat 2 years ago with an existing engine problem. It has the following drive; Engine Make Mercruiser Model MCM 140 Serial number 5568367 Displacement 181 CID Stern drive Make Mercruiser Type Alpha 1 Serial number OB656591 I rebuilt the...
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