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  1. tg3690

    spin-on gas filter

    All it is is money.....am no expert, but you don't want a filter that would cause a problem with fuel flow.....not sure how strong the fuel pump is on your 9.9hp.....it will have to be able to suck fuel through whatever filter you get.
  2. tg3690

    spin-on gas filter

    The oil is in solution.....it cannot be filtered out. (y)
  3. tg3690

    spin-on gas filter

    Shouldn't need a water separator filter on a portable tank as you can just dump it out if water gets in there. Hard to do with a built in tank. It could work but the filter would have to be mounted somewhere in a vertical position in the boat, then connect your portable tank to it. Probably...
  4. tg3690

    1984 force 125 low compression question?

    It's your motor you can do what you want......WD-40 is good but I don't think it will fix your compression problem. 30-40 PSI tells me it is time to take a look.....snake camera in the plug hole or remove the head. It won't hurt anything to try the WD-40 and find out for yourself if that will...
  5. tg3690

    1984 force 125 low compression question?

    (y)
  6. tg3690

    1984 force 125 low compression question?

    Back firing could be a timing issue.....maybe a sheared flywheel key. I would not run it again until you figure out what is going on with the low compression on cyl#3....that is a known problem that needs to be addressed first.
  7. tg3690

    1984 force 125 low compression question?

    Was referring to the gasket leaking....uneven or too much torque can cause the gasket to leak.
  8. tg3690

    1984 force 125 low compression question?

    The torque spec for the port cover bolts is not much at all.....don't have my manual handy but Mastertech Marine shows 70 inch lbs for 1/4-20 size bolts....or about 6 FT Lbs. If over torqued can cause it to leak.....FYI
  9. tg3690

    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    That is a great idea.....will try that next time! (y)
  10. tg3690

    1984 force 125 low compression question?

    See post #6....jerry says that a bad fuel pump or gasket should have nothing to do with low compression in that cylinder......OP said he resealed the port cover and new gasket for fuel pump. Time to take a look at #3 cylinder I think..... He should have been able to see the side of the piston...
  11. tg3690

    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Been there, done that with a jack.....the angle is the ticket. LU can get heavy quickly trying to stab it in there, lol. Your idle issue....to me sounds like a fuel starvation problem.....if you didn't clean/rebuild the carbs before it might be time to do it. Check all fuel hoses, primer...
  12. tg3690

    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Looks like yours has a 130* tstat......140 not that high. You got good water pressure on hose, muffs sealing good?
  13. tg3690

    1984 force 125 low compression question?

    Freshwater engine should be easy......saltwater engine could be trouble, bolts snapping off, etc.....
  14. tg3690

    Which Force is most Mercury?

    Force ended production in 1999....lots of parts I get for my old Chrysler are Quicksilver branded, mostly NOS parts from ebay and a few others.
  15. tg3690

    1971 outboard power head compatibility

    Franz's website is down but I talked to him yesterday so he is still around. Just in case, his number is 816-966-8085...
  16. tg3690

    1971 outboard power head compatibility

    Just checked out Outboardparts.com for the first time.....good to know, thanks Nordin.
  17. tg3690

    1971 outboard power head compatibility

    If you get no response on here, you can call maxrules(master tech) and ask Bill Kelly the owner. Or call Franz at Franz Marine.....he would know for sure. (y)
  18. tg3690

    1984 force 125 low compression question?

    The transfer port gaskets can be a source of trouble.....can cause a cylinder to suck air and run lean. You can test them by spraying starting fluid all around the intake side while running...the engine will stall if they are leaking. I too used a sealer on those gaskets.....against the advice...
  19. tg3690

    1984 force 125 low compression question?

    Is the fuel pump gasket good? Might be time to pull the head and take a looksy.....could be a bad head gasket.....or scored #3 cylinder/piston.....post some pics if you find anything damaged or don't look right.
  20. tg3690

    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    When alarm goes off check temp of head with IR thermometer......if not hot then you got a wiring/elec problem.....or maybe a bad thermo switch.
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