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  1. M

    prop selection

    I have a 98 johnson 50 spl on an aluminum center console boat 16 feet long. i am estimating my weight with motor and people and gas to be approx 1200 lbs. my current prop is 12 1/4 x 15. i haven't tried it out yet, just got the motor but want to close when i hit the water. the rpm range for this...
  2. M

    audible horn question

    i have a 98 johnson 50 spl, i can't get the warning horn to sound, i tried a new horn and tried grounding heat warning wire to ground. in the service manual it lists an adapter to be used when you are not using the 8 pin connector. is this my issue? i have the 8 pin connecter not plugged in to...
  3. M

    what is this?

    I have a 98 johnson 50 spl and noticed this oily trail from in front of propellor. it is definitely not gear oil, it is much too thin and wipes right off, drained gearcase., no signs of water, the same stuff is coming out of the propellor hub, any ideas?? It feels like watery exhaust with a...
  4. M

    rubber grommett??

    can anyone tell me how to replace the rubber grommet on the back of the motor that looks like a square. it is located on top of midsection looks like an exhaust outlet. it is torn and barely hanging on. motor is a 98 johnson 50 spl thanks
  5. M

    confused over controls

    i just bought a 1998 johnson 50hp that came with original side mount remote and cables. it has all functions in the control. my question is i have to mount this on my center console. how can i do it? can the handle be switched to the other side of the box?? it needs to mount on the right side...
  6. M

    Good deal???

    I have a chance to buy this for 2600.00 does this sem like a good deal? 1986 17' Sportcraft Center console, with galvanized trailer, 1986 115HP Mercury motor, runs well, used it the other day on Winni. Has fishfinder, compass, fire extinquisher, etc. Also has a Minn Kota trolling motor($600...
  7. M

    are these any good?

    I have a chance to buy a 1986 sportcraft center console with 86 merc 115. freshwater use and owner states runs well. Are these ok motors? Is it oil injection or do I have to mix gas? DO these suffer from the brittle wiring problems of the late 70's motors and how do the trim/tilt systems hold...
  8. M

    ok motor choice??

    I have a 1976 duranautic offshore 16 . Was told rated for 60 hp but I have acess to a 1977 70 hp to replace my blown up 50 hp. Do you think it is ok to put this motor on this boat?? THe deal is too good to pass up on them motor. Please help as I would like to purchase the motor tomorrow. I...
  9. M

    ok motor size???

    I have a 1976 duranautic offshore 16 . Was told rated for 60 hp but I have acess to a 1977 70 hp to replace my blown up 50 hp. Do you think it is ok to put this motor on this boat?? THe deal is too good to pass up on them motor. Please help as I would like to purchase the motor tomorrow. I...
  10. M

    short or long shaft??

    I am looking to buy a 1977 merc 700 and don't know if it is a short or long shaft (20 inch transom on my boat), serial number is 4716625. anyone know?
  11. M

    should i buy this??

    I have acess to a 1977 mercury 700 (70 hp ) inline 3 cylinder. It was only test started when new and kept in inside storage since then. It is just dusty but looks new to me (no paint worn off the prop or lower unit/etc.) I know the guy selling it so i know this isn't a tall tale. It is like...
  12. M

    power trim

    i have 76 merc 500 mounted on my center console. i want to install a 77 merc 70 hp. can i use my existing power trim/ tilt with the 70?? it is the model with the trim motor and pump in the boat and the cylinders on the outside of swivel housing. the 70 has similar looking lift assists (pistons?)...
  13. M

    Motor Control Help.

    I Have A 16 Foot Center Console With A Mercury Outboard And Want To Purchase A 1998 Johnson 50 Hp To Install On The Boat. I Currently Have A Top Control Box Made By Ultraflex. The Johnson Is Coming With A Side Control Box. My Older Ultraflex Control Does Not Have A Trim/tilt Button Or Key In...
  14. M

    Any Good???

    I Have A Chance To Buy A 1977 Mercury 70 Hp Outboard. It Was Started Maybe Once When New And Never Installed On A Boat. The Paint Isn't Even Worn Off The Prop. It Was Part Of An Estate Sale And Has Been Kept In Indoor Storage For All These Years. I Need Advice On If I Should Buy This Is Or...
  15. M

    coverting to power trim

    I Have A 1976 Merc 500 That I Am Going To Replace With A 1977 Merc 70. The 70 Does Not Have Power Trim/tilt. My 50 Hp Does (i Have A Pump And Motor That Sits In Back Of Boat And Transfers Fluid Thru Lines To Motor. Can This System Be Adapted To The 70 Hp Motor ? (the Mounting Areas Look Similar...
  16. M

    rebuild time?

    I Took My 1976 Merc 500 To Dealer For Link And Synch To See If They Could Get Better Performance Out Of It. I Had Been Having Some Trouble Starting And Thought This Would Help, They Found Water Getting Into Bottom Cylinder So I Told Them To Go Further. They Pulled Power Head And Removed Exhaust...
  17. M

    merc 500 hard cold start

    I Have A 76 Merc 500, Rebuilt The Carbs, Flat Levels Set Perfectly, Issue Is When I Have To Start It Cold It Cranks For A Second And Coughs, Then I Have To Keep Cranking Starter, It Takes Many Times Of This Before I Can Get It To Fire Up And Idle. Choke Works Fine, Primer Bulb Gets Hard. Once...
  18. M

    See If Anyone Knows The Answer To This One?????

    so, i have a 76 merc 500 and have been chasing a bog. I had a slight bog when hitting the throttle that i couldn't remove by adjusting the idle mixture screws. . I adjusted floats and reinstalled carbs, bog still there. all of this testing has been done with motor running on muffs. what i...
  19. M

    checking fuel pump

    I have a 76 merc 500 and want to know if fuel pump is bad. it had fuel pump built into side of carb body with the little blue fuel inlet caps that say tillotson. i blew into the fuel inlet and can hear air rushing into carb until i raise float, then i can't blow anymore. my fuel line bulb get...
  20. M

    carb help?

    ok, my 76 500 is killing me. i pulled the carb because i had a bog when accelerating. adjusting the idle mixture screws made no difference to performance. after pulling carbs i found restriction in passage for idle mixture screw. cleared restriction and checked rest of carb, all checked out ok...
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