Search results

  1. Lou C

    OMC Cobra water pump question

    Dump the one with the rock in the hole lol. You can use the other one which judging by the box is a Sierra. Better yet get a whole OEM OMC housing and impeller kit I’ve installed a number of these over the years and never had a bad one… For OE: marine engine dot com Crowley marine dot com
  2. Lou C

    Fried the 4th impeller kit? (OMC 2.3)

    I think I explained how to check for blockage in the lower unit water passages & the water tube gaskets but if not: 1) remove impeller housing 2) hook up muffs and turn on water Water should spurt out of one of the openings in the impeller housing. If not, hold the muffs tight to the lower unit...
  3. Lou C

    7.4GL temp sender info needed

    Also try taking a reading with the IR temp gun of the intake manifold right underneath where the thermostat housing bolts on to it. I have found that with the OMC/Volvo stat housing design this area seems to test closest to the gauge reading, about 10-15* lower than the gauge. The stat housing...
  4. Lou C

    Trailer tires dryrotting again

    I’m on my 3rd set of Kenda Load Star tires with no dry rotting or cracks till 8 years of use.
  5. Lou C

    1994 Merc 5.0 2brl Carb issue when off

    If it dribbles like that with the engine OFF I doubt it’s too much fuel pump pressure. I’d remove the carb dump out the gas turn it upside down and rig up a hose so you can blow thru the inlet. With the carb upside down you should not be able to blow air into it. If you can the needle & seat are...
  6. Lou C

    Engine vibrating after water in engineoil

    That’s what I thought
  7. Lou C

    Engine vibrating after water in engineoil

    Normal compression is 150-160 on these engines so your # 6 is low at 120 and the cyl head gasket looks blown to me…dark around the left side of the cylinder. Yes the 2 piece system can corrode and leak but if in salt water you have to replace them on a regular basis like every 5-7 years. I had...
  8. Lou C

    Bad day on the water - NEED ADVICE!!

    Agreed while its big number price wise it is the best plan long term, both from the point of view of repairing ALL the damage and fixing other things that cause trouble on older boats (oil pans, starters, steering arms, hinge pins etc).
  9. Lou C

    Water in engine oil. 150 mercury Varado.

    Try posting up at the hull truth there are a lot of outboard pros there. I would: Check for water in cyls and do a compression test. Usually with OBs it’s eroded sealing surfaces between the block & cyl head, or a small hole rotted in the head or block. Might just be a head gasket though.
  10. Lou C

    Engine vibrating after water in engineoil

    I’d go back and check the compression again. Do these newer 4.3s have adjustable valve train or is it like the newer style net lash? I’m wondering if any valves are sticking due to the water ingestion. I had this when my head gaskets blew and leaked water into the cyl. I had one valve on each...
  11. Lou C

    Replaced rubber impeller now won't shift to neutral??

    You can get the height exactly right makes it easy on the old back
  12. Lou C

    Replaced rubber impeller now won't shift to neutral??

    try Stumpy's Fab Works, I have one of his. if you're going to own I/O boats and do your own work, this and an alignment tool are must have items. I have saved thousands over the years doing my own outdrive R+R every year and have avoided repairs and spending money unecessarily due to repairs...
  13. Lou C

    Replaced rubber impeller now won't shift to neutral??

    Buy or build a drive jack it will save your back and make these jobs much easier; I’ve had one for years for my OMC Cobra.
  14. Lou C

    4.3 set timing?

    Although the Merc service bulletin does not specifically mention it, I would check for drips from the discharge tubes in the venturis after the engine is shut off. Run it as you normally would, shut down and then remove the flame arrestor. Look down the carb throat with a bright LED flashlight...
  15. Lou C

    4.3 set timing?

    I always used at least 89 octane fuel if not higher the gas docks here only sell 93 octane. Even with my old cyl heads I never had run on or pinging.
  16. Lou C

    4.3 set timing?

    Interesting I have heard this about Merc 4.3s yet never once experienced this on my OMC version with the Quadrajet. I thought Merc had a TSB addressing this issue.
  17. Lou C

    94 4.3l lost compression 1-3-5

    Those engines are pretty easy to take apart and simple to repair, I had to use an impact gun to get the cyl head bolts out because of raw water cooling in the salt water. I would do a leak down test first. You can still get reman heads for the pre vortec heads, or get yours redone if they just...
  18. Lou C

    Manifold and riser/elbow question for V6 Tahoe Q4

    I measured this when I changed my OMC 4.3 from the old one piece bat wings to the later OMC/Volvo 2 piece style, I got 16” which was good, but if they were too low I’d have to have used the taller Volvo elbows.
  19. Lou C

    Manifold and riser/elbow question for V6 Tahoe Q4

    I would measure the static water line & use Mercs 14” above the static water line spec to figure that out. That’s the right way to do it.
  20. Lou C

    Volvo Penta 3.0 I/O Overheating. Brand New Engine!

    Great that you found what it was and that the solution was not an engine problem but a relatively simple one at that! Congrats!
Top