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  1. M

    everyone talks about pitch but what about diameter.....

    what effect does a change in prop diameter have on choosing the right prop? is there a rule <br />of thumb like the 1" pitch equals 200 rpm for judging diameter? I ask all this because of advice <br />I am getting from local shops. I decided to switch from aluminum to stainless & started...
  2. M

    good place to buy a tach???

    looked all through iboats & cant find a tach for my 97 force 120. anyone know a good online store to try?
  3. M

    where does the fuel stop???

    when you pump the bulb tight forcing fuel down the line does it stop at the fuel pump & start building pressure or does it <br />keep going to the carbs???
  4. M

    what happened to the s.t. marine website???

    I am really missing thse parts diagrams. anyone know if it moved or closed down?
  5. M

    question about gauges...

    Im having trouble with some of my gauges. stock setup on a 1997 astro 1700 bass boat with a 1997 force 120<br />model h-120412td, late serial number. the trim gauge jumps erratically when trimming up or down, always ends up<br />being accurate but never moves in a smooth motion, sorta spikes up...
  6. M

    lost top speed and...

    a few weeks ago I hit a log at a pretty low speed(maybe 15-20 mph) but fast enough to jar the motor pretty good.<br />on the way in the overheat siren went off & I shut her down & trailered her right then.I ran it on the hose for about<br />30 minutes the next day & it did fine.next time out it...
  7. M

    clearcoat oxidation question...

    what is the best way to clean the oxidation off & restore the finish? the oxidation is just on the surface, not very deep at all.<br />only a few small spots in the creases of the outside of the boat.
  8. M

    from aluminum to stainless.....

    just wondering if there would be a need to change diameter or pitch going from aluminm to stainless props.<br />Im running a 13 1/4 x 23 pitch aluminum now.RPM's are perfect & top speed is good too. really slow out of the hole though.<br />everyone keeps telling me that a stainless prop will fix...
  9. M

    having a problem with restarts....

    1997 force 120 starts easily after launching.problem comes up after I run for at least 20 minutes & then stop & turn the motor<br />off for 20 or 30 minutes.when I go to restart the motor it acts really cold natured.I have been making sure the bulb is pumped.<br />sometimes even have to engage...
  10. M

    hitting floating logs....

    on a bass boat setup what are you most likely to damage on the outboard when you hit a floating log at speed?
  11. M

    help with new problems......120 force

    have a 1997 force 120 on a 17' astro bass boat.today I took it out fishing & after about 3 hours I decided<br />to head in for lunch.cranking battery was dead...when I first launched she fired off really quick as usual.no problem, <br />I switched my trolling battery & cranking battery out &...
  12. M

    anyone need a maintenance manual for a Force 40/50/75?

    ordered one from Merc for a '97 120 hp & they sent me one for a 40/50/75 hp motor.not sure which year<br />guessing somewhere around '96 or '97. the cover has it listed as the 90-120 manual & has a publication <br />date 1996.free to someone in need
  13. M

    what is cavitation??

    I know this is probably a dumb question but I see this term mentioned alot in here & just wondered <br />if someone could explain it? thanks
  14. M

    lower unit plug gaskets....

    doing the fluid change on the 97 force 120 sometime this week.is there somewhere online I can get the gaskets <br />for the fill & drain plugs?would gaskets from something else work?thanks
  15. M

    correct plugs for 1997 force 120?

    want to throw a new set of plugs in her but my manual hasnt got here yet & want to make sure the previous owner had the right ones.also what should the gap be?thanks
  16. M

    sticking tachometer

    noticed the other day that my tach was sticking.first run it does fine.sometimes after I stop it will be stuck.if it sticks at 2500 and I run at a speed that usually is 4000 the tach will go to 6500.then it may go back to zero when I stop again...it seems to be pretty random.it does seem to stay...
  17. M

    lower unit lube change...novice needs advice

    just bought my first boat last week.took it out twice last weekend & it ran great.want to change the lower unit fluid without trashing anything.<br />the motor is a 1997 Force 120 on a 17 foot Astro bass boat.got it to top out at 56mph.wondering about the correct procedure for doing this.where...
  18. M

    L drive???

    probably a dumb question but what the heck is an L drive?saw a post a few days ago about a 120 Force that <br />had this & everyone seemed to agree it was a bad thing.which years did the 120 force use this?
  19. M

    tips on buying used outboard???

    looking at buying a used boat & wondering if you guys could help me out.I dont know much about outboards<br />and need to know the simplest ways to tell the condition of an outboard.most of the boats I have looked at <br />arent near a lake so the best I can do is run them on muffs.any help is...
  20. M

    Tracker & Force outboards....

    are Tracker & Force outboards the same motors with different stickers or is the Tracker closer to the regular Mercury line?thanks
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