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  1. rothfm

    Crossflow no water out relief holes at plane speed?? really need advice.

    Can can anyone tell me the path of those relief holes? I understand the impeller path and have the OEM diagram. What happens with the relief holes/path/poppets? Really looking for input, as i've been working this cooling issue awhile. 1993 Johnson 115 bubbleback. My issue at the moment is no...
  2. rothfm

    Help with Carb rebuild. Pics & questions.

    Never rebuilt carbs before, have a bunch of questions if someone can help. 1993 Johnson 115. Got a pic of a tube that appears broken off in a carb, maybe explains my lean sneeze? I Swapped carbs with another motor to prove sneeze was carbs--it was. Brought the carbs inside and noticed one of...
  3. rothfm

    crossflow 1 3/16 carbs vs 1/516's...fixed my lean sneeze..but difference??

    1993 Johnson 115 bubble-back. I read alot of posts about Lean Sneeze--and good descriptions by ENDSmapper---Thanks to all who take the time to explain!!! I diagnosed mine by swapping in another set of carbs to see what it would do. Immediately it ran smooth, and idled down good, big difference...
  4. rothfm

    1993 Johnson 115 measuring head temps with IR gun?

    Hi, I believe I'm ok with appx 135-145 shooting around the head covers and heads. Some places down low are 115-125. But mostly I see 135-145. But, If I aim deeper toward the inner/back of the piston area...I can see temps in a couple spots at 150-161. Is this normal, if the areas around and on...
  5. rothfm

    Rustoleum as Bottom paint on Trailered boat?

    Hi All, I've seen a couple people talk about Rustoleum (regular type) on Boat bottoms. Was wondering how it was used, over what? and tesults. My Needs: Trailer exclusively. PO already painted and it looks ugly. Dont want to go thru the cost and work of full strip or repaint with expensive...
  6. rothfm

    More Coil/Powerpack questions 1984 Johnson 115

    My motor has a mix of coils in it (posted before) from PO. Am I able to use the "newer" style 2-post Coils and the Powerpacks from my 1985 parts motor?? The pn's for each are different, and from what MarineEngine.com and ********** show, I'm not sure about any compatibility. The Manuals show...
  7. rothfm

    Listing/sticky of alternatives to omc sealants?

    Could swear I saw on here, a brief chart of possible alternatives to the list of OMC sealants and gels etc...Want to look at that if someone can help me find it, of might have it handy. Gotta begin obtaining some items. Thanks Mark
  8. rothfm

    Rggg, I usually dislike compatibility questions....But here's another Sorry. '84 115

    Been using the BRP, Iboats.net charts...and dont really have an answer to this. I've looked at the charts in the sticky too. Rebuilding my '84 115hp. I believed spare lower unit I already had would be a match. Its a 1993 25" (same length of both). I test slipped it onto the Exhaust housing on...
  9. rothfm

    pics of mismatched coil setup on motor I'm rebuilding, what the heck?

    moving toward the ignition portion of my rebuild...'84 J-115. When I took it apart I didnt notice this: I have one coil Different that the other 3! And the oddball was in the same position that had a bad Cyl...This may/may not be a culprit-but weird. I acquired the motor. I have 3 pn 582107...
  10. rothfm

    Did I damage my stator during flywheel removal? Pics

    I just looked at my stator on the bench and hope I didnt damage it. I have my '84 115 apart for rebuild. When I removed the flywheel looks like I might have gone in with the 3 bolts a bit too far (I knew this about removal and thought I was careful). I just happened to peek at the stator today...
  11. rothfm

    sizes/specs of Fuel and breather hoses on Crossflow? Change to Silicon or another?

    Hi, I want to replace all the rubber lines on the motor while apart on the bench (115 1984 Johnson). I couldnt find the specs in the OMC manual. Does anyone have them? Or I'll take some to the store I guess. These are the carb lines, and recirculation lines. Was also interested if generic...
  12. rothfm

    pok marks(holes) in port passages on '84 115 (pics)

    Hi all, Wondering if anyone has seen this, or has any thoughts? I'm rebuilding a 1984 Johnson 115. Got the block back from the shop. Measured, cleaned, honed and ready for me to continue. Upon looking closely, I noticed several ports have small "pok" marks...ie...little holes in the side of...
  13. rothfm

    Is there any tricks to getting a manual release valve out of a TNT (1984 Johnny 115)

    Got my entire motor down to a pile of parts, literally. Soon to go back together. The manual release valve wont turn, I want to replace it, so I took the snap-ring out, but cannot pull that valve assm. Last time I did one just taking the ring off, it popped right out. This one however doesnt...
  14. rothfm

    Reed plates dont sound the same when tapped with finger on workbench? 1984 Johnson115

    I had another post asking about what the reed plates actually did. But Yet another question now. When I lightly tap the reed "fingers" against thier backing plates on my workbench...3 of the assemblys sound solid against thier backing. One Reed Assm has several fingers that make a hollow sound...
  15. rothfm

    Can TNT Tilt Ram shaft be removed?......1984 115hp Rebuild question. PIC attached

    Does anyone know if the main tilt ram shaft/head/eye can be removed from the cylinder? See attached pic for reference. I'm taking apart (very slowely and carefully--due to corrosion) brackets and TNT from my motor. I want the TNT and have another complete swivel assm already. The very last thing...
  16. rothfm

    Piston Pics, are these worth cleaning up??

    Got my 1984 Johnson 115 pistons out finally. 2 of 4 have a patch of moderate to heavy carbon build up (thus 1 broken ring!). Are these worth cleaning up???..I"ve tried a couple different cleaners, that havent cut the carbon/varnish. Otherwise they seem ok. Sort of explains this new to me...
  17. rothfm

    Rebuild Question Johnson 115, piston sizes. hopefully not a dumb question here

    My 115 teardown (first time) went smooth and uneventful. I had 1 outter ring break (prior to my purchase) it tested fine and had good compression. When I got into it, it Had no damage other than a pocked head and Piston. Walls very smooth. My plan was to replace offending Piston & Head, hone...
  18. rothfm

    Socket size for Rod cap bolts in 1984 Johnson 115? PIC attached.

    finally split my PowerHead...Long slow process but going very good. The omc manual calls for a OMC socket to remove the rod "cap" screws...they are a Bristol/Star type pattern I believe its called. Seems an 8mm might fit, but the issue is the clearance. The heads are sort of recessed and there...
  19. rothfm

    Pics of my Homemade Flywheel holder used on my 115

    Maybe this will help others... I had my Johnson 115 powerhead on the workbench (with flywheel), and needed a cheap way to hold things still to remove the nut and while using a puller. Made a simple wooden holder-See pics The "arm" portion is long enough to rest solidly on the bench. The Circle...
  20. rothfm

    V4 Bore Honing? 1984 Johnny 115

    1984 Johnson 115 replacing rings. Got my Power Head all apart finally. Going to take it to a shop to be cleaned, and honed as well as measure the holes and remove 2 broken bolts I cant get out. I never honed before, I take it its recommended at this stage-But does it take material off? Should...
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