Search results

  1. K

    1984 75HP 4 Cylinder Gremlins

    Good afternoon, I've had this Mariner 75HP (grey, ugly, Mercury) for a number of years and I've never been able to make it run really well. The primary thing that bugs me is it just doesn't run well at mid-throttle, say 3,000 - 4,000 RPM, which just happens to be where I like to cruse, lower...
  2. K

    1984 Mariner (Merc) 75HP mid throttle surge.

    Hi, My Mariner (really a 4 cylinder Merc in grey clothing) is driving me nuts. It starts and idles well, the throttle response seems pretty good and it runs like mad over 4000 RPM but at cruse speeds of 2500 - 3500 RPM it surges, almost like it's running out of gas. I've got the service...
  3. K

    1984 Mariner 75 low speed jet question

    Good Evening, I have a newish to me (I've had the engine for a number of years but only ran in a little bit before it being put up in storage) Mariner 75 4 cylinder. When I got the engine I had to replace pretty much every electrical component other then the coils. I also rebuilt the carbs...
  4. K

    Stalling/Breaking up (70HP)

    I've been running my rebuild (click here for more info) but I just can't seem to get it running right. Low speed just seems rough, working with the low speed jet doesn't seem to be getting me any where. The engine also when at low idle (neutral) randomly stalls (no load up, just dies).<br...
  5. K

    Trouble Shooting Tach

    Now that I have my 1993 70HP up and running I want to get my tach going. Last year it would come and go, but now it's dead. It's a Faria and it lights up but it doesn't seems to be getting a signal. Can I test to see if a signal is there using a multi meter or somthing like that?<br /><br...
  6. K

    1993 70HP rebuild complete

    I'm not sure how much interest there is in this sort of thing but at one point I was asked to post my results, so here they are.<br /><br />I lost the middle cylinder, scored pretty well plus the rings were fused into the piston. Needless to say no compression, the whole thing was in line to be...
  7. K

    Dang blasted! Sealer not locker

    I just got done turning the last bolt on my 1993 70hp rebuild (dead cylinder, overbore with new pistons) and was cleaning up when I grabbed the package my thread locker came in and noticed that it wasn't locker at all, but thread sealant... I remember gabbing locker at the auto parts store...
  8. K

    Reuse rod cap bolts

    The service manual says to replace the rod cap bolts with new ones after removing them on my 1993 70HP, does this really need to happen? The threads are fine, they just need the old loctite removed.<br /><br />The reason I ask is the local Merc dealer looked them up for me and they come in...
  9. K

    Aftermarket Pistons (Wiseco vs Vertex)

    I'm to the point were I need to start thinking about ordering parts for my powerhead (Scored wall/Over bore). Looking around the 'net I've found a couple of different choices as far as pistons go. The first is the tried and true Wiseco. I've run these in snowmobiles before and they seem like...
  10. K

    1993 Force 70hp scored cylinder

    The second cylinder on my power head is scored. It ran a little bit funky before the damage was done so I think I cracked the ring earlier then did the wall in over the weekend.<br /><br />Anyway a quick internet search turned up oversized pistons avaiable so I guess that's the direction I'm...
Top