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  1. dandreye

    92-802878Q52 Light Gray Primer: any feedback?

    Hi All, How good is 92-802878Q52 Light Gray Primer applied to the sanded bare metal of lower units and painted over with a 92-802878Q1 Phantom Black Paint spray can? I already saw Mercury's instruction on painting lower units but won't be able to find any of the primers or paints recommended in...
  2. dandreye

    Fuel line thread sealants: Permatex Form-A-Gasket #3 vs #1/#2

    Hi All, Sorry for the possible off-topic... I recall reading someone's advise on this forum to use Permatex Form-A-Gasket #3 to seal threaded fuel line connections. Could anyone please explain what exactly makes #3 any better than #1 and #2 for this purpose? The latter 2 are available in a lot...
  3. dandreye

    Root cause of Mercury 2-strokes' rough idle

    Hello All, My 90 ELPTO is quite rough at idle, even stalling occasionally. I've been told rough idle is the nature of the beast and is common for all Mercury 2-strokes as they are optimized for riding. Fair enough but what's the root cause of rough idle? (assuming all components work as...
  4. dandreye

    Vertex vs OEM pistons

    Hi All, Any opinions wrt quality of Vertex pistons compared to OEM? While looking for .015 oversize ones for my OB I've come across this one: Just curious. Thanks in anticipation, Dmitriy
  5. dandreye

    Racor 120AS fuel filter with R12S cartridge: any feedback?

    Hi All, Has anyone been using Parker Racor 120AS fuel filter with R12S cartridge (2micron)? If so how good is it? Any thoughts why it may not work well with a Mercury 90ELPTO? (e.g. low throughput or whatever) Many thanks in anticipation, Dmitriy
  6. dandreye

    Drive shaft sleeve for 90 ELPTO

    Hi All, I am looking for a replacement prop hub for my 90 ELPTO made in 2000. Have just found Mercury part number 835290Q1 for Mercruiser called Drive Sleeve but it doesn't show up in the 90 ELPTO parts catalogue for some reason: Can anyone confirm if it fits (or doesn't fit) my outboard as...
  7. dandreye

    Mercury 90 ELPTO smoky when started cold

    Hi All, My 2000 Mercury 90 ELPTO is quite smoky every time it is started cold e.g. as soon as next morning after use (or later). Is that because of some residual oil in the engine? How does it get there or accumulate there? Is it the way these engines are designed to work or sounds more like...
  8. dandreye

    2000 Mercury 90 ELPTO dripping oil when left trimmed up

    Hi All, My 2000 Mercury 90 ELPTO (2-stroke) has been dripping oil when left trimmed up. It is a lot better now that I replaced the O-ring on the filler plug - yet still didn't go away completely. Are these outboards supposed to be completely dry when trimmed up? There's reportedly a defect...
  9. dandreye

    Iridium spark plugs for Mercury 90 ELPTO

    Hello All, What iridium spark plugs does Mercury Marine recommend for a 2-stroke Mercury 90 ELPTO? (year 2000, serial #0P121707, model #1090412YB) Has anyone got any experience with iridium plugs in this engine? I'm aware the standard spark plug type is BU(Z)HW-2, just contemplating an upgrade...
  10. dandreye

    90 ELPTO compression readings

    Hello All, What compression is typically found on a brand-new 90 ELPTO and what *absolute* reading requires overhaul? I cannot see any figures in my service & repair manual. Other posts on this topic tell me that anything above 100 PSI and 5-10% between cylinders is OK, however my mechanic is...
  11. dandreye

    Offset drive shaft in DF90: pros and cons

    All, Can anyone who owns a DF90 or a similar design engine report any issues arising from the offset drive shaft in DF90? The latter is one of my next choice engines, so trying to find all pros and cons about it before buying. Thanks in advance, Dmitriy
  12. dandreye

    Warm 2000 Merc 90 ELPTO starting issues

    Hello All, During a week of intensive freshwater boating my 2000 Merc 90 ELPTO would start at a 10-15th or so attempt when warm from time to time. I would first try starting it with the fast idle lever down as always, then try lifting it somewhat up, half way up, all the way up, then pushing the...
  13. dandreye

    2-stroke 90hp: check valve orientation in crankcase cover

    Hello All, In my 3-cyl 2-stroke carbed Merc 90hp made in 2000/01 there are 3 tiny metal check valves each with a nylon ball inside. They reside in black plastic holders installed in the crankcase cover (each at the corresponding crankshaft bearing). Can someone please confirm which way their...
  14. dandreye

    Suzuki DF90 vs Yamaha F80/F100

    All, Weight of these engines put aside, is a Suzuki DF90 any better choice than a 4-stroke fuel-injected Yamaha or vice versa? What matters most is (1) reliability and durability, (2) performance and fuel consumption, (3) ease of servicing, diagnostics and troubleshooting. My own preference so...
  15. dandreye

    Mercury 90 ignition problems

    Hello All, What else besides ignition parts (3 CDM modules, stator, trigger and regulator) may also need to be replaced in a 2001 Mercury 90 ELPTO engine that briefly sank in freshwater but didn't suffer a hydraulic impact? At present only cylinder #1 (top) runs steadily while 2 others behave...
  16. dandreye

    Mercury 90 ELPTO runs on 1 cylinder

    Hello All, Got a 2001 3-cyl Mercury 90 ELPTO serial #0P121707 (Belgium) from a boat that drowned in fresh water (the kill switch was NOT activated) and was recovered in a few hours. ALL adequate procedures were applied at once to rid the engine of the water. Nevertheless it now runs in a weird...
  17. dandreye

    Prop diameter for a Mercury 90

    Hello All, Recently bought a used boat with a 2-stroke Mercury 90hp (I think 90 ELPTO) made around 2002, w/o any documentation. Looking to buy a SS prop for it. Have seen a general recommendation on this forum to start with a 19" pitch SS prop - but which diameter? I've come across some posts...
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