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  1. M

    Carbon build up

    I was cleaning my spark plugs earlier on my 140 merc and noticed heavy carbon buildup on the end of the plugs. I was wondering why i only drove for about 45 min. It seemed like i had a lack of power and im getting some hesitation when im coming up on plane. What do you think could be causing...
  2. M

    Question

    I know this may sound stupid to some but what does OMC stand for. I have a merc 140 and it says omc on the block and gm on the head, is it chevy, ford or what. Also is it quality or crap? Just wondering cause i see it alot on the threads.
  3. M

    How can i find year of motor?

    I was told when i bought my engine it was an 85. I was wondering if their was a way i can find out using the internet exactly what year it is? Reason being i see people having these 140 engines from the 60's on and i want to know for sure what year mine is the guy i bought it from didnt seem to...
  4. M

    140 merc gas in oil

    I was running my boat today just to start it up cause i have not ran it for a while. It ran fine. When i shut it down and let it sit for a few i checked the oil and noticed the level was high andthe ol smelled like gas and was very thin. What could have caused this? It was a little hard to start...
  5. M

    #4 cylinder not firing

    I was trying to get a smooth idle on my 140 merc today and just couldnt get it smooth. Finally , it seemed like it wasnt firing on al cylinders. I began pulling off plug wires while the engine was running. 1 2 3 responded by running rough but when reconnected went back to normal. However, when i...
  6. M

    adjust carb?

    I have a 140 mercruiser 1985. It has a 2 barrel rochester carb. I have a rough idle and i am running rich. How do i adjust the mixture so i can have a smoother stronger idle? thanx mike
  7. M

    rough idle 1985 merc 140

    I recently was having truoble starting my boat. I had to put the throttle all the way down for it to start and then back off it so it wont over rev. I seen that when the throttle was in the neutral position the choke was closed. When i put the throotle lever all the way down it would open up...
  8. M

    new prop

    Happy Labor Day to everyone! I recently bought a new prop for my boat and i was just wondering what to expect. I have a 195 sea sprite cuddy cabin with a mercruiser 140 alpha 1 I/O. The prop size i had befor was 14 1/2 x 17. I told the guy i wanted to come up on plane a little faster so he told...
  9. M

    2.3 volvo penta

    I was wondering how much horsepower does a 2.3 volvo penta motor has.
  10. M

    2.3 volvo penta

    I was wondering what i should try next on this motor. Its locked up and i cant turn it by hand. I tried lube and everything i know. Should i start taking it apart to rebuild it or is their something i can do to try to free it up. it ran 3 years ago and just beeh sitting. Thank you for any input...
  11. M

    1986 2.3 volvo penta locked up

    Hey guys, my friend recently inherited a boat that has an 86 volvo penta engine the guy said it ran about 3 years ago but he hasnt touched it since. So we tried the key and the starter engaged but the motor wont turn over. The crank pulley was rusty and the exterior of the motor was in poor...
  12. M

    140 merc rough starts

    Hey, guys i have a little problem that i dont know if it is normal or not. When i start the boat up the motor wiggles and shakes for the first 30 seconds or so. It shakes the boat and just dont seem right after the 30 second mark it runs fine and dont move at all. What could this be?
  13. M

    oil change lower unit

    hi guys, i was wondering what pump do i need to change the oil in the lower unit? And also what kind of oil does it take. Alfa 1 merc 140. Thank you!
  14. M

    lower unit question

    This past weekend i got into some shallow water and tore up my prop a little. I noticed when i turn the prop now theres a click,click,click sound it turns very smooth and it seems tight enough just a little play when i pull on it. Is this normal or do you think i might have messed up a bearing...
  15. M

    prop advice

    I have a 1989 mercruiser 140 the boat is an 89 seasprite 19.5 ft i was wondering what would be the best prop to put on. I have a 14 1/2 x17 prop on now. i would like to gain alittle speed if possible i normaly have 2 people with me on the boat. what do you think? thank you, mike
  16. M

    prop advice

    I have a 1989 195 sea sprite with a mercruiser i/o 140. I busted up my prop today in shallow water. I was able to get back in ok, thank god. I now want to change the prop and i was wondering what pitch would be the best for the boat. I would like a little added speed the one i have now is 141/2...
  17. M

    breaking in rebuilt engine

    what is the max rpm i can go on a motor that has been rebuilt? somebody told me 3000 and someone else told me 2500 which one is it ita a 140 mercruiser drive is alfa 1 i took it in the bay and i didnt go over 3000 and now my friend is saying i shouldnt have went over 2500 if thats the case is...
  18. M

    140 mercruiser hard starting

    i took the boat out for the first time yesterday it seemed good the only thing is i need to cdank the crap out orf the motor to get it to start once it starts its fine but if i let sit for a half hour or so it will do the same. Also what rpm should i plane out at it seems at 3000 rpms i dont...
  19. M

    140 merc

    how do i change oil in out drive alfa 1
  20. M

    140 mercruiser engine tap

    i got a tap on my motor when its idle at first it sounded like the water pump so i changed it and it is still there. I thinnk it sounds like it is coming from the crank pulley.Also, im not getting a reading on my oil pressure gauge i never did since i replaced the engine. I ve been running it...
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