Recent content by 998cc

  1. 998cc

    GM 250 165 L6 Inline engine: New fuel system, failed Airtex fuel pump.

    Just found this old post and wanted to update. The old Mercruiser black pump that I rebuilt with a new diaphragm kit in 2016 is still running strong. (Keeping the little electric pump stowed in the boat just in case.) Regards, Russ 998cc
  2. 998cc

    Skeg repair for MC-1 (1972)

    Hello all. It has been awhile since I have posted here. The good thing is I have been enjoying my old 1972 Gulfstream ever since you all helped me bring it back from the dead in 2013 and 2014! Well, I finally manage to damage the lower portion of my skeg. I am looking at these bolt on skeg...
  3. 998cc

    Thread specs for trim system brass fitting?

    I need a brass fitting for my 1972 Mercruiser 165 trim system. The male side is 1/8" npt to thread into the trim sending unit, the other side takes a standard trim hose. What is the thread/fitting description for the trim hose? Many web searches and have not found the answer (or a suitable...
  4. 998cc

    Replacement pump for Presolite MC-1?

    All. Is there a modern replacement hydraulic trim pump for the MC-1? I assume it is a Prestolite. The pump I have is shown in Volume II of the Mercruiser manual C-90-7107 in section 7A. I think my pump has a stuck pressure relief valve. I have a second non-working pump that I took apart as a...
  5. 998cc

    1972 MC-1 drive will not raise

    Hello all. I need your assistance in resolving a new problem. A month ago, I replaced a blown trim pressure line in the bilge area and went for a three day campout on a local lake. The trim was working fine until loading up the boat on the trailer. The drive would not raise. At the boat ramp...
  6. 998cc

    1972 GM 165 Inline 6 MC-1: Engine dies *after* shifting into reverse

    Hello all. This is my craigslist boat you all helped with in 2013/2014. I adjusted the lower shift cable about two years ago as per Chris' video and all was good. The last few times out, it has been difficult to get into reverse, grinding etc. Re watching the video, I have raised the sliding...
  7. 998cc

    GM 250 165 L6 Inline engine: New fuel system, failed Airtex fuel pump.

    Has anyone else had a problem with new Airtex marine fuel pumps? I installed a new Airtex marine fuel pump about two years ago. It is a marine pump and has worked without a hitch until yesterday. On a local lake, the boat was running strong then suddenly stumbled and quit about a mile away...
  8. 998cc

    1972 MC-1 Water in hydraulic trim system

    Hello all. I took the boat out yesterday, and at some point, a hydraulic hose literally popped off the fitting at the trim cylinder. It failed to raise at the dock, and I had to manually raise it to get it on the trailer. There is now water in the hydraulic system that needs to be...
  9. 998cc

    Potentially dangerous fuel system issue

    All. This isn't a question, and it may be in the wrong forum. I walked into the garage this morning and was met with a strong gasoline smell. I immediately opened the garage doors to vent the fumes and went looking for the culprit. What I found was the outside stern of my boat damp from...
  10. 998cc

    1972 MC-1 U-joint changeout unexpected issue

    I am in the garage typing with grubby fingers. I pulled the drive to change the U-joints and noticed there is not enough clearance to remove the U-joint closest to the outdrive. The threaded ring is in the way. I assume it meas pulling the shaft out to do the job;is that correct? Is this an easy...
  11. 998cc

    1972 165HP Inline 6, 4.1, 250ci clarification on alternator belt changeout.

    I saw the other thread on this and decided to start this one. Since changing the alternator belt requires removing two of the engine mounting bolts and a small section of the engine mounting bracket, should this require a recheck of engine alignment? I ask this because there is some clearance...
  12. 998cc

    MC-1 GM Inline 6 250 Ci Exhaust shutter question

    My exhaust shutters were missing, so I have never seen how they are installed. There is a bracket in the exhaust tube with a bar that goes across the top of the opening; this bar is a little loose. Is this bar that remaining piece from the old shutters? Otherwise, I have no clue how these go...
  13. 998cc

    Inline 6, 165, 250 GM,motor, Intake/Exhaust manifold warped?

    Hello All. i have been posting here since picking up a new-to-me boat in March of 2013. The issue I have now is an exhaust leak the I traced to the head/manifold joint which is leaking; yes, the bolts are tight and a new gasket was used on motor assembly (rebuilt motor). The head was done at...
  14. 998cc

    MC-1 Propeller/Thrust Hub Seal?

    All, I am replacing my aluminum prop with a stainless steel prop of another identical MC-1 drive. My aluminum prop has a rubber seal that mates up to the thrust hub. The stainless prop has what appears to be the remnants of a seal in the same location. I can't find a seal in the Mercruiser...
  15. 998cc

    carburetor sight tube replacement

    Re: carburetor sight tube replacement Can a marine-rated inline fuel filter connected with USCG approved fuel line be used as a sight glass in lieu of the Tygon tubing?
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