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  1. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    I’ve made up a lead as suggested.
  2. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Thanks Scott, appreciated 👍🏻
  3. Superjetjim

    Can run a 4.3 Merc without the alternator belt?

    Hi looking to test my 4.3 tomorrow out of the boat on a test stand. Is it OK to run it without the belt attached (I have the single belt connecting alternator, power steering pump to flywheel and water pump)? Reason I ask is the power steering reservoir is drained and I didn’t want to run it...
  4. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    In a boat storage barn, with tarp I was told. Interior is immaculate and it’s only done 40hrs from new. Was winterised by a dealer when put into storage (have paperwork to support. I drained some of the fluid from the block and left in freezer overnight and it stayed as water so it’s had that at...
  5. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Yes thanks, hopefully when I start it this weekend it sounds okay. I’ve dropped the oil once and quite quickly it came back as slightly cloudy rusty. Hopefully it’s just light cylinder rust as you say. Oil doesn’t seem to be coming out of one of the pushrods particularly well compare to the...
  6. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Thanks all for your help, I’ll be rebuilding the carburettor, installing the new risers, bolting it down to the pallet and trying to start it this weekend for the first time. Wish me luck! I did have one last question, the plug socket on the engine where you connect the controls, I understand...
  7. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Yes they were, replaced with new ones and now it’s turning over strongly! Thanks 🙏🏼
  8. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Just been and re-tested with new leads. It turns over with any 3 of 6 pots with plugs in, more than that it won’t. Also the fresh oil change this week now looks like this. I suspect bottom end might be shot (rust discolouration in oil?)
  9. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    I think you might be onto something on the connections, I’ll check them next. I’ve just fitted a brand new starter so it won’t be that, battery is a new high end YUASA. It’s spins over easily without the plugs in the pots and valves / rockers are all going up/down. So 185PSI isn’t too high for...
  10. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Thanks Mike, that was my intention but it’s not turning over due to the high compression with the plugs in. Plugs out I’ve expelled as much as I can with plugs out, just need to thin down what’s in there to get it out. Maybe carb cleaner is the answer? Or perhaps some thinner fogging oil might...
  11. Superjetjim

    Mercruiser 4.3 removing oil from bores?

    Hi, I’m just being a 4.3 out of long term storage (19yrs!) I squirted a couple of shots of engine oil into each plug hole to help with initial turn over - the motor is now free and turning over with good (albeit high, due to the residual oil) compression. The motor spins over freely on the (new)...
  12. Superjetjim

    Mercury 115 Tacho conundrum...

    I have a 1993 Mercury 115Hp 2+2 My tacho is not working and so far I’ve done the following but still can’t fathom it out: 1) Installed a brand new Merc Tach 2) Set Switch on rear to number ‘4’ as per shop manual 3) Fitted new rectifier box 4) Ran a direct cable (to bypass the grey wire in...
  13. Superjetjim

    Is this normal? Just changed impeller

    Just changed impeller on 93 115 Mercury, followed the service manual to the letter, done a few before, it’s pumping water healthily as you would expect. Once completed I thought I’d test it before heading to the coast - noticed this, is it normal? It’s flowing out the pisser as normal, just...
  14. Superjetjim

    Merc 115 2+2 RPM Gauge

    Hi, My RPM counter doesn’t work on a boat I recently purchased with a Merc 115 - can I simply check for voltage on a wire on the back of the gauge perhaps, or is it more complex than that? Also - is my engine a 93 looking at the serial number 09776985? Thanks for any help! Jim
  15. Superjetjim

    Yamaha F115 help please!!

    2003 Yamaha F115 outboard 347hrs My outboard recently refused to start, I assumed VST filter or low pressure filters had blocked, I've stripped and cleaned them all, drained the tank and added fresh gas - still the same. Quick blaster of starter fluid and off she goes for a few seconds but...
  16. Superjetjim

    Merc 200 v6 carb - no spark on pot 1 and pot 5 - any ideas please?

    Hi, Tried my new (to me) Year 2000 Merc/Mariner V6 200 2.5 carb today - turns out it's not sparking on the top right or middle left pot (as you look at the motor from the rear) All compressions are perfect and equal, just no spark on these plugs - all the other pots spark brightly. The wires...
  17. Superjetjim

    Merc 200 v6 sneeze when blipping throttle - video enclosed.

    New engine (to me) it's a year 2000 v6 Mariner/Merc carb. Started it for the first time today, compression equal on all pots. Idles ok, but when I blip the throttle via the fast idle leaver it sneezes out of the lower left air intake as the revs drop back down - see attached video...
  18. Superjetjim

    Power difference - 150 to 200 v6 Merc/Mariner?

    Is there much difference in power/torque between an old Mercury 2.0L 150BHP and a modern 2.5L 200BHP Mariner? Also the newer Mariner has 'Electronic Ingnition' written on the case - wasn't this on the early V6 150 Mercs? - If not how does it differ? Thanks Jim
  19. Superjetjim

    Mariner 200 V6 Oil Injection Bypass - is this item required?

    Hi I've been reading up on bypassing the oil injection on my motor - the guy I bought it off said to remove the oil pump, pull the shaft out and refit the oil pump (plus remove all the other stuff like sensor/tank/T Peice etc) So do I need the Oil injection block off kit ? part #43453 or can...
  20. Superjetjim

    Mariner V6 200HP Tilt Tube??

    Hi, I've just purchased a Mariner V6 200HP 1999 model but it is missing the Tilt Tube - I need to source the standard one so I can use my Teleflex system with it. Does anyone know the P/N and and expected cost please? Do they just tap in with a mallet? - Motor is off the boat suspended by...
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