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  1. K

    1975 Mercruiser Tilt/trim issue

    The lines close to the stern should be the high pressure for up. The rams are not left and right, always the most forward port on the rams is for the up circuit. Do not look for any type of release valve. If you had a pressure gauge that goes up to 1000 lbs you could test the down circuit...
  2. K

    1975 Mercruiser Tilt/trim issue

    As Scott06 posted about standing on he drive to see if that helps to bring the drive down. There is up to 3000 lbs of pressure to raise the drive and only 7-800 lbs on the down circuit. The packing inside of the end of the rams get a build up of crud that most times restricts the down...
  3. K

    How do I safely remove anti-siphon and intake line?

    2Xs with Lou, the outboard tank method is the only safe way to locate a fuel related problem.
  4. K

    Engine swap. Raw water intake 4.3

    I prefer going through the bottom of the boat with a shut off valve. While a transom mounted pickup will work it just adds another rooster tail. Whichever one you do be sure to let water cycle through the drive to keep it cool by leaving the hose off that transfers water through the transom plate.
  5. K

    1981 120 mercruiser rough idle

    With a timing light check that the marks hold steady. I bet that they will not because the bushing above the oil pump is worn out and the rortor shaft is wobbling around.
  6. K

    dual outdrives

    Does your rams look exactly as the ones AD posted a picture of?
  7. K

    3.0L mercruiser compression

    All 4 cylinder engines have what feels like “blow by” but it is really the result of the pumping action of pistons pushing air from the crankcase which is normal. With real “blow by” from worn or stuck rings there will be oil all over the top of the valve cover along with white smoke.
  8. K

    Volvo Penta PJX jet drive

    The double ball bearing and seals can be purchased from a bearing warehouse. Google Berkeley Jet drive and you will see that the parts are the same. Berkeley made several models but the internals are the same. Try to get a service manual from Volvo.
  9. K

    Merc pre alpha trim pump thread sizes help

    Models after the one you have eliminated the reverse lock valve and added an extra ball and spring in the valve block. This was adjustable but very critical, it had to be adjusted with the Mercruiser test kit. Since you mentioned some balls falling out the valve it will most probably leak. On...
  10. K

    Merc pre alpha trim pump thread sizes help

    On the bottom of the old style pump the brass elbow is 1/8” NPT, remove it and get a 1/8”NPT male to 3/16” inverted flare so that you can connect the low pressure “down” hose to the pump. The other port is the “up” high pressure side. This will work but since there was reverse lock valve you...
  11. K

    Merc pre alpha trim pump thread sizes help

    Since the trim block on your gimbal housing is 3/16” female. Remove the block and make up 2 steel 3/16” lines about 6” long with a 3/16” flare nuts on both ends that will screw into the trim block. Or 2 mercruiser stainless braided lines like the ones that attach to the rams. With 2 1/4”...
  12. K

    best muffs to use on mercruisers?

    The genuine Mercruiser ones are the best in my opinion. Whenever I had to use the other ones I always wrapped a bungee cord around the flushout just to make sure it would not slip down and burn up the pump. I learned that the hard way.
  13. K

    Mercruiser 165 shifter cable thread repair

    To replace the bushing/seal you will need to replace the shift lever because the screw will not come out, you will need to break the lever. Sierra # 18-2161. Lever # 45518A3. Set screw Mercruiser # 18-2170. Lever # 10-8M0084649 set screw
  14. K

    Bellows Replacement Mercruiser Alpha One Gen 1

    To help doing the bellows job get a 5/16” 1/4” drive universal socket and some screwdriver handle 1/4” extensions. A genuine Mercruiser service manual also. Good luck.
  15. K

    Is this considered as an outboard or !/O powered?

    The ones I remember had a 6-71 Detroit coupled to a stern drive. 2 of them could actually plane off a barge. Most times they were welded on. Usually they would power a barge with supplies and then swapped over to an empty barge to return on. I knew a guy who was involved doing that. I was in...
  16. K

    Mercruiser Pre Alpha transom assembly

    I have used a shock absorber grommet. Worked perfect. Be sure to put never seize on the threads that hold the flange down..
  17. K

    1981 MC-1 driveshaft reinstall into upper housing- any tricks to this?

    Now you learned a new trick! Good job!
  18. K

    1981 MC-1 driveshaft reinstall into upper housing- any tricks to this?

    I have had to apply heat to the housings several times. With the housing positioned so that gravity will help give heat a shot. Just be sure that the shims are in place.
  19. K

    Another Free Boat Project

    Rotate the drum 180* and drive the screw out with a small punch. I have always been able to remove the screw. It is a 1/4” 20 screw. You can pull the engine and intermediate housing with the cable still attached. Then maybe it will be easier to remove the screw.
  20. K

    Another Free Boat Project

    You have to remove the slotted head screw and the shaft will come out. You may need a magnet to get it out of the cavity.
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