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  1. Fun Times

    4.3GXi-J is hard starting, completely out of ideas

    In reading I didn't notice where you re-checked fuel pressure after your fuel rail was only showing 20psi with key on - Replaced both fuel pumps. Now instead of no start, I had hard start. Re-check fuel pressure both on the low psi side and the high side. You'll want to ensure you're now not...
  2. Fun Times

    Need help figuring out the year of my 3.0L Mercruiser Engine

    ^ Gotcha to where in further studying, you're correct. I did find one other note that brings up a past memory to some of my earlier thoughts above, (Many fuel pumps are used on similar engines. In order to identify the correct fuel pump for your application, you must check the “clock” position...
  3. Fun Times

    Need help figuring out the year of my 3.0L Mercruiser Engine

    There are/were two designs for the fuel pump...One up one down and searching through the two pump designs in the parts catalog, the one that goes down suggests line modifications would be necessary so either make your own or possibly buy what's available under the facing down pump parts catalog...
  4. Fun Times

    Need help figuring out the year of my 3.0L Mercruiser Engine

    0A617689 belongs to a MERCRUISER 140, model number 01402006 which makes it a 1986 year model. https://www.mercruiserparts.com/140-gm-181-i-l4-1982-1986-6229718-thru-0b450800 0A637671 = MERCRUISER MC1 1.98:1, model number 01989016.. 1986 as well...
  5. Fun Times

    What kind of wrench (name) is he using in this video?

    https://www.facebook.com/reel/2032451030902616 Maybe it's the video but the speed of it almost self-turning is what's piqued an interest.
  6. Fun Times

    Freeze plug part number

    Check your sizes and see if you are able to make a match to any of these, https://skidim.com/freeze-plug-manifold-7-8/
  7. Fun Times

    B3X upper gearset lash

    I wouldn't be surprised if Merc had even a newer version by now and looking up the serial number in question seems to first suggest it's pointing to use number 28 but starting in January of 2022, they have a supplement part number 8M0185811 which ought to help with any updates even over 28 and...
  8. Fun Times

    Alpha I Gen I Hinge Pin 'bushings' ?

    Check through the links at JR Marine to see if that fits any of your findings for repairs… https://jrmarine.com/products/bellhousing.htm
  9. Fun Times

    How do you screw into fiberglass/gelcoat without chipping?

    Masking tape down and running the drill in reverse first tends to help a lot.
  10. Fun Times

    2005 4.3 liter Mercruiser ignition trouble

    Seemingly seems a bit unusual giving issues being the engine is cold but odder things do tend to happen unexpectedly being a boat. Glad you stayed with it to find the solution…
  11. Fun Times

    2005 4.3 liter Mercruiser ignition trouble

    How did you come to the conclusion it’s a TKS diode issue? https://yanmarshop.com/catalog/media/F53DEL3GOJSW4Y3INVQXE2LOMUXW2ZLENFQS6YTNMUXUOQKZIRBVQQSRI5JE6RCFJVBFCR22J5CUWVCTG5DUCMSBFZYGIZQ
  12. Fun Times

    Cool Fuel Gen 3 Module Sea Water Connection

    See item numbers 7…. Might need your engine serial number to fine tune the correct part but in general you ought to be able to buy a new or used one probably on eBay using the part number...
  13. Fun Times

    2005 4.3 liter Mercruiser ignition trouble

    Take a jumper wire at the back of the key switch and connect terminals B and A, then take another jumper wire and connect to terminal B and touch terminal S (Start) and see if the engine starts normal. Also right now, when you turn the key to just on (ignition) do the gauges power up? No? Then...
  14. Fun Times

    Mercruiser 3.0 won't "lock in"

    Here's your parts catalog for your serial numbers... 0B849523 = https://www.mercruiserparts.com/3-0l-gm-181-i-l4-1987-1989-0b450801-thru-0c856558 0B934426 = https://www.mercruiserparts.com/r-mr-alpha-one-sterndrive-1983-1990-6225577-thru-0f386995 ^One in the same as, 0B943249 =...
  15. Fun Times

    2005 4.3 liter Mercruiser ignition trouble

    Wondering if someone’s been switching wires at the key switch as the colors seem off to me unless I’m going colorblind in my old age ha ha… the colors seems backwards between the I and A.
  16. Fun Times

    454 mag mpi chuggles/stalls

    This question on post 61 seemed to go unanswered...? As in some reference, is item numbers 2 and 3 in place?, https://www.mercruiserparts.com/bam/subassemblydetail/37744147/28149300 https://www.ebay.com/itm/135583030541?msockid=3e043f2b2586627b2de92ee9241463e0...
  17. Fun Times

    High Fuel Pressure

    Should you pre-fill with fuel if possible, yes to help avoid pump stress / heat / early wear out… do you have to, no… with many key on key off cycles, it should self prime. http://download.brunswick-marine.com/filereader/file/pdf/5/enen/mercruiser/gasoline/879288300/879288300_5c.pdf
  18. Fun Times

    Alpha1 Gen2 Oil Reservoir Missing?

    Though rare, there are some (mostly 3.0 models) that had the gear lube oil reservoir as an option and sometimes it seemed dependent on boat model too when say ordered from new. If I recall correctly, sometimes having the three serial numbers from Mercruiser might distinguish if it didn’t come...
  19. Fun Times

    High Fuel Pressure

    Now you have to be careful that the paint didn't make its way to the injector....Again?... Also you may have to clean the inner fuel rail and the fuel damper on the rail (that's similar to a regulator) as you wouldn't want to lose it's needed performance... I believe you can open the one up on...
  20. Fun Times

    SX-A Gear Oil Screw

    Impact screwdriver should get it out... https://www.harborfreight.com/6-bit-impact-screwdriver-set-with-case-64812.html
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