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  1. U

    Can't be that simple

    I have been told that the only difference between a 100hp 89merc and a 115hp 89 merc is the carbs. Is that really true?
  2. U

    1989, 100 hp Mariner

    Last fall my 89, 100hp Mariner would not run at WOT. Coming back across the lake it started slowing down and would only run at 1/2 throttle or less. There was no missing or rough running and it idled fine just wouldn't run wide open. I was going to take to my mechanic only to find he has moved...
  3. U

    Boat rides to port.

    I'll try to keep this short. Bought an old boat for the trailer, after hauling the boat to the dump I realized the keel rollers were all welded and not adjustable. I put my boat on the trailer and the rollers were way off from fitting the keel of my boat? I ordered adjustable keel rollers...
  4. U

    Right prop

    I am running a 17' 1968 aluminum Crestliner deep V that I have been working on for a couple of years and have it where I can get it out and do some fishing. The motor is an 89 2 stroke 100 hp Mariner with a 13.25 X 17 prop (3 blade aluminum). It will currently run out at 30-32 mph at 4600 rpm...
  5. U

    89 100hp Mariner trim/tilt fluid

    What is the correct fluid to top off the trim/tilt for my 89 Mariner? The manual says Type A or AT transmission fluid but those designations are no longer applicable. I have looked on the site for info but I don't seem to navigate this site to well. Thanks for the help.
  6. U

    Worst Captain ever?

    Ok, I'll admit it I must be the worst Captain ever. I need some suggestions to help me load my boat at the ramp. A little background. The boat is an aluminum 17 foot 1968 Crestliner Nordic deep V that I have been working on for a couple of years. I found a trailer that had an old 70's model...
  7. U

    100 hp Mariner 1989

    Took my Crestliner to a mechanic to have this motor mounted and adjusted. When he ran it there was a small water leak from one of the bottom bolts that hold the cylinder cover where the spark plugs are. He attempted to tighten the bolt after heating it and twisted it off. He then filled the hole...
  8. U

    89 Mariner 100hp

    I have a water leak on the lower port side cyl block cover so I need to pull the cover and replace the gasket. I am sure most of the bolts will be rusty and seized. What do you recommend for getting the bolts out without breaking them? I have been thinking about heating them with a heat gun, any...
  9. U

    1989 100 HP Mariner wiring schematic

    Does anyone have a copy or know where I can get the wiring diagram for this motor? I purchased it last fall and listened to it run. After getting it home and removed from the boat it was on I noticed it looked like someone has cut a few wires. I am assuming they are to the oil and overheating...
  10. U

    Mercury XR Black Max series

    Just a curiosity thing but, can anyone tell me what the XR stands for in the Mercury XR Black Max series of motors? Thanks
  11. U

    Mariner or Johnson

    I need to replace my old 75 merc 115hp that I have on a 1968 aluminum 17' Crestliner. I have been looking at two different motors that seem to be in decent shape. One is a 1981 115 Johnson and the other a 1989 Mariner. If everything is equal what would be your choice? Also as a side note, are...
  12. U

    89 100hp Mariner compression test

    Going to do a compression check on an 89 100hp Mariner this AM. I understand those are the 2+2 motors and I was wondering if there is anything different about compression checking those as compared to a standard motor. I am not familiar with this system so I was just wondering.
  13. U

    1982 100hp Mariner

    Going to look at a 1982 100hp Mariner tomorrow and was wondering what peoples feelings are about them. Are parts still available, will mechanics work on them those sort of things, or should I just steer clear and keep looking?
  14. U

    Prop advice

    I have a 1968 aluminum Crestliner Nordic 17' with a 1975, 115hp Merc, at WOT it runs at 30mph (gps) and 4200 rpm with two men in the boat. I don't care that much about increasing the speed but I would like to get the rpm's up closer to max which is 4800 - 5300. The current prop, and I don't know...
  15. U

    Stiletto Advantage

    I came across a Stiletto Advantage stainless prop in the correct size for my boat but the hub is a 13 spline Johnson or Evinrude. Can I get a different hub kit and convert it to a 15 spline for my old 75 115hp Merc? Thanks
  16. U

    1975 115hp Merc Hard starting

    I have a 1975 115hp Merc that is hard to start. I have to choke it constantly and it still takes 10-15 attempts. I have the cold idle lever up 3/4 to full and on full choke the entire time. Even after running for 15-20 minutes if we shut it down and fish for 20-30 minutes in order to start it I...
  17. U

    1975 115hp Merc

    How can I slow the idle on my 75 115hp merc? It idles at 1250-1300 RPM. I can give a little tug on the distributor and it will come down to about 900 but, the next time I rev it up it will stay at 1250 again. Is the idle adjustment part of the link and sync process, which I know nothing about...
  18. U

    1975 115hp Merc

    Hi guys, Took my 75,115hp Merc out for the first time last week and this is on a 1968 Crestliner that I have been redoing for the past year. The motor is new to me and has many new parts and has been rewired. It ran fine most of the morning and we even trolled with it for about an hour. After a...
  19. U

    1150 power trim and tilt hoses

    Can someone tell, or show me where each hose connects to the pump unit for the PTT? This is on a 1975 1150 Merc two cylinder system. I know they can really only go two ways which gives me a 50/50 chance, but I don't want to have to take it all apart again after filling and bleeding the system. I...
  20. U

    1975 Merc 1150 pees on muffs

    I have a 1975 Merc 1150 that I bought last fall. I replaced the impeller, put it on muffs and turned on the water before starting it for the first time today. The pee stream started spraying water even when the motor was not running (not all the time but most of it). On my other Merc's the only...
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