Search results

  1. S

    3.7 Head Gasket??

    Re: 3.7 Head Gasket?? Before you put the head back on, take a straight edge and a feeler gauge and check the gaps on the entire head surface, and block surface. nothing more than a .006 feeler gauge should slide between the surface and straight edge. If you are over .006, then you need to...
  2. S

    what is tow weight?

    Re: what is tow weight? Yes the torrent is basically an equinox with a Pontiac logo on it. I was looking at my trailer, and it appears that it is a trailer that is most likely from the 70's or something. I doubt it came with this boat. Anyways, it has a brake actuator on it, so it does have...
  3. S

    Backfiring through the carb HELP!

    Re: Backfiring through the carb HELP! There is not going to be a filter between the pump and the carb on the fuel lines. the fuel filter is inside the pump. Here is a picture I made for you. Blue Arrow- Loosen this nut Red Arrow- Remove this retaining bar from the pump Green Arrow- lift this...
  4. S

    what is tow weight?

    I am trying to understand exactly what tow weight means and how it is defined. my vehicle has a tow rating of 3500 lbs. Does this mean that I can tow a boat and trailer that weighs 3500 lbs. on a scale, or does this mean that I can tow something that requires 3500 lbs. of pull force to move...
  5. S

    blown head gasket. pictures.

    Re: blown head gasket. pictures. I went home last night and started to pull out the files. I started draw filing the head surface before the block surface. The head surface has carbon buildup between cyl 2-3 just like the block did. Since I knew I needed to file the head as well, I just started...
  6. S

    blown head gasket. pictures.

    Re: blown head gasket. pictures. Ever since I bought the boat, it has had a rough idle. I am assuming that the previous owner blew the head gasket, the boat ran like it did when I got it and sold it thinking there was massive damage. So I assume the head gasket has been blown since I have owned...
  7. S

    blown head gasket. pictures.

    Re: blown head gasket. pictures. OK so I got home last night and was able to modify the pictures to be able to upload them. So I got a picture of the "carbon build up" between cylinders 2 and 3. I noticed that there looks as there is a crack in the block there. However when looking at the side...
  8. S

    blown head gasket. pictures.

    I did a compression test and the results indicated a blown head gasket. I removed the head and sure enough the seal between 2 and 3 was blown away. I am going to the marine store to get a new gasket. However while I had everything torn apart I wanted to make sure everything else was good. I am...
  9. S

    flywheel leaking. 3.0L merc...

    I have a leak on my engine that I discovered recently. This leaks when it is hooked up to the water muffs. It is not a bad leak, it is a steady drip give or take. There is oil in the bilge bay and I am not sure where this is coming from. The fuel pump was leaking oil around it, but I installed...
  10. S

    MCM 140 wiring help!!!

    I have been trying to figure out why my MCM140 is running rough at idle. So far this is what I have done. Set point gap to .022 with feeler gauge. new spark plugs set to .035" new condenser changed oil set timing to 6* BTDC took carb apart and cleaned it out 100%. set float drop to 27mm (1...
  11. S

    which mercarb rebuilt kit?

    So I decided to get a rebuild kit for my 1984 mercarb mounted on a 3.0L but I can't decide which one to get. I took apart my Carb and cleaned everything on it and put it back together. It runs much better on the trailer idle and stuff, but it appears to seem to hesitate when giving it quick...
  12. S

    engine timing.. help understand..

    I have lots of questions and I am sorry for the long post. This is my first time timing an engine so I want to make sure I am doing it right. I have a 1984 3.0L Mercruiser engine, with a points ignition. I have been reading the timing instructions and I want to see if I understand this. #1- It...
  13. S

    MC1 power trim question

    I have a 1984 boat with an MC1, 140 3.0L I am new to this boat and I have rebuilt it to the point that it is ready for it's first test drive this week after work. :joyous: I was playing with the trim the other day and I need some input. There is a switch on the dash that says UP and DOWN...
  14. S

    84 Rochester 2GC carb question.. need help

    My 3.0L engine was running very rich and having issues with the float and what not, so I removed the carb from the engine and tore it apart to clean everything out and put back together. From my analysis, it would appear that someone at some time has tried to do a carb rebuild on this carb and...
  15. S

    mercruiser shift arm help

    I have a 1984 MC1 Stern-drive. The black bushing on my shift arm was worn down and my boat was not shifting into reverse, but it would go into forward. So I took it to a marine shop and they told me I needed to change my shift arm. I went down to the marine shop and bought a new shift arm. I...
  16. S

    MC1 water pump seal?

    I replaced my water pump last spring with a kit. I followed the manuals instructions and things seem to be pretty good when it is hooked up to the hose. However I have searched everywhere and cannot find a solid answer on this. The water guide tube seems to fit tight in the top of the water...
  17. S

    mercruiser sterndrive shift cable help

    It is time to get the boat out on the water again. Last fall I had some issues with shifting on my boat. it would go into reverse but not forward. after adjusting the cable it will go into forward and not reverse. Anyways, after measuring slop, and adjusting the cables, and brass barrels and...
  18. S

    throttle cable barrel help.

    I have a mercruiser mcm140. From what I can gather, the cable is a morse teleflex. The cable has a plastic barrel that holds the cable to the engine block. The black plastic barrel has broken in half, and the throttle cable is not working now. From calling a few local marine shops I am told I...
  19. S

    mercruiser 140 won't start. Help

    OK I have a very strange problem. I have a boat that has been sitting for a few year that has not been started. It is a 1986 mercruiser 140 3.0L. when I turn the key, the engine rotates just fine. however it just sounds like an engine that has no spark as all. I spray starter fluid in the...
  20. S

    Shift fork positions.. Need advise.

    I have the lower unit off my boat trying to decide if I have a lower unit problem as to why the boat is not shifting correctly. It is an MC-1 lower unit. 1984 give or take a year. I just replaced the lower shift shaft, and I am trying to decide if I have too much movment in the shift shaft...
Top