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    why cant I get over 4200 rpm ?

    I have touched on this before, but I am still in a rut with this problem. I have a 73 merc 850 with a jet pump. I have rebuilt carbs, new fuel pump, new fuel lines, link n sync done. I installed a new tach and verified accuracy with a dwell tach. 4200 rpm is all it will do period. It will plane...
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    1985 DT85 was this a good year ?

    Hello, I have a 1985 DT85 that was given to me. It has great compression, and has a jet pump. It has sat with old gas in it I can smell that. I was wanting to know if this was a good or not so good year or model for Suzuki, and would it be worth while to invest in getting it running. Was it...
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    restart issue

    I have a 3.0 mercruiser pontoon boat. takes a few cranks on the starter to get it primed and running, runs great. if I park it and shut it off for an hour( give or take) or more it will not start up right away, rather it acts like it did at the first start of the day, maybe 20-30 seconds on...
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    Fuel pump filter

    Hoping for a quik reply. I just replaced the filter in the fuel pump, I need to know if I should tighten the nut til it stops or just snug. It is about 1/8-3/16 from where it stops. Thanks
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    Spline grease

    I think I forgot to grease the splines on my gen2 LU. What is the main purpose of spline grease, To keep water out for future disassembly and friction/wear reduction. Hoping it will b ok for a season.
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    Lubriplate

    I have read a lot of posts on grease. I have a tube of "all purpose" lubriplate 630 AA I use for pump bearing on a jet drive, would this be ok for gimbal bearing and or other apps?
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    Mercruiser 3.0 plugs

    I have a 98 3.0 mercruiser engine, I pulled the plugs and are not what is recommended on the arrestor plate. Plugs I took out are NGK BPR6EFS The flame arrestor label indicates AC-MR43LTS. I have ordered the latter one. I want to say I read somewhere that the wrong info was put on some flame...
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    Fried ground wire

    I have a mercruiser 3.0, turned the perko switch to all to tilt drive when this ground wire went up in smoke. Immediately shut off perko switch, when smoke cleared all I found fried was this wire that goes from bell housing to transom drive plate. My question is what caused this possibly and...
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    Upper shift shaft removal 73 merc 9.8

    Guys, I am trying to remove the swivel/tilt unit on this 73 9.8 merc. (It is broken) Lu is off, upper shift shaft is in the way of extracting swivel. Do I have to pull power head to get out upper shift rod ? Thanks.......
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    Mark 58 seal needed

    Remove
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    stripped flush port

    I went to put the flush plug back in and it just kept spinning. Appears that the hole is stripped, not the plug. Any ideas on how to fix ? Too shallow for helicoil in my opinion. Welding not a great option, penetration would be a problem.
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    Rectifier upgrade Mark 58

    I have successfully installed a 25 amp bridge rectifier on a 73' merc 850, thanks to the help from this forum. Is there any reason it would not work on my Mark 58 Mercury motor? Original is burnt up. Thanks
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    My idea of foam replacement

    I had some dock foam sitting around so I decided to use it in my boat. I made a foam wire cutter and cut custom fit blocks from the "billet" foam. Thought it might be of interest to some. With these blocks I believe I got the most floatation possible.
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    Gluvit

    I am replacing the floor in my 71' 16' Starcraft SS. This was going to be a quick floor job, but is escalating into more work as I read more, and see others boats nicely restored. After reading several posts about gluvit, I am apprensive about using it. The boat has no leaks. My concern is that...
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    1985 Suzi kill cord

    I have a 1985 dt 85, I am in need of the proper kill cord. I purchased a set of unicords, but none fit. Can someone post a pic or link of the one I need ? Thanks
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    Water seepage into engine compartment

    I just purchased a mercruiser pontoon boat, this my first mercruiser, so I have a lot of questions. Should there be no water at all in engine compartment ? How much is acceptable ? I actually have not used the boat yet, I did back it in to the water. Water immeadiately starts to come in from...
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    Mtsterious part found in motor compartment

    I found a grey tube in the bottom of engine compartment. It is grey plastic 1/2" diameter and 10.5 " long. What is this ? maybe it is nothing ?
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    Bilge float switch wiring question

    I just purchased a pontoon boat with a mercruiser 3.0 . There is a waterline inside the motor pod, up to the alternator. I know this is not good. I decided to investigate the bilge float switch. To my dismay, it was bypassed and totally disconnected, bilge works off switch on dash. I found float...
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    Outboard tank parts

    I want to rebuild my mercury 6 gallon tank, it is a 70's vintage. I need gasket and site glass and glass rubber, Does anyone know where I can get these parts ?
  20. S

    Merc 850 with jet pump not getting full rpm

    I have touched on this in the past but have new infomation and felt best to start new thread. I have a 73' Merc 850 with a jet pump. I recently added a tach to verify motor performance. I have been through link and sync proceedure and everthing seems hunky dory. Motor idles around 650 rpm...
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