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  1. bobgritz

    Is 90W Grease OK For My 1968 9.5hp Sportwin Gearcase?

    I drained the grease/oil from the gearcase. It looks clean, olive green color and appears waterfree (no foam). It has the consistency of 90W grease/oil. I had to reverse the direction of the clutch dog and need to put it back together tonight for use tomorrow. Obviously nice fresh grease would...
  2. bobgritz

    1976 6HP ... where is idle adjustment?

    Obviously there is a low speed lean/rich adjustment knob protruding from the front of the casing for fine tuning the mixture at low rpms but, is there no conventional mechanical idle mechanism. I have a couple of other Johnson's and in addition to the slow speed air/fuel adjustment, they all...
  3. bobgritz

    How Do I Check Crankcase Pressure In 15HP Johnson ... also, F_R mentioned

    I am replacing head gasket on my 15 horse Johnson but in a recent post, F_R mentioned 'crankcase pressure' and I have always been curious of the procedure to check this (and what is the acceptable range). I was tempted to replace the exhaust gasket too and wondered what the procedure is and how...
  4. bobgritz

    Shear Pin Substitute or Alternative ... Brass Is Too Soft

    Does anyone know of a tried & true alternative to a shear pin (not to be confused with 'drive' pins which are usually stainless steel and have little to do with 'shear' pins). Obviously there are different specs for different engines but this isn't rocket science here ... my thread is focused on...
  5. bobgritz

    9.5 HP Sportwin 'Pops-Out-Of-Gear' and goes into neutral ...

    Not all the time but maybe 50% of the time, my 1968 Sportwin jumps out of gear and goes into neutral. This can happen at slow, medium and high speed. Even in reverse! It almost feels like a linkage issue rather than a transmission problem. If I simply hold the shift lever down its fine. Perhaps...
  6. bobgritz

    Model I.D. From Serial Number

    I picked up a bunch of marine parts headed for the deep six and among the stuff was a decent little 2 cylinder Mercury motor that looks like it can be brought back to life. It's seized at present but before I start ripping into it I wanted to identify the model, year and hp. There is no cowling...
  7. bobgritz

    Propeller Rubber Bushing "Spinning" ... Self Repair Question

    As a commercial clammer, we spend a lot of time out at low tide and it is not uncommon to ground-out in the sand flats. As the tides withdraws, we need to stay in channels but inevitably we find the edges of the channel ... there's no way around this ... it's a fact of the trade. I'm in the...
  8. bobgritz

    Cannot Tighten Stern Bracket Tension on Sportwin ... Nut Just 'Spins'

    The tensioner bolt on my Sportwin will not tighten. The 'friction nut' (connected to the bolt) is obviously spinning and I don't see any way to get a wrench to it unless I remove the entire stern bracket. Surely there is a shortcut I'm missing ... perhaps (strategically) drill a rather large...
  9. bobgritz

    Tiller Interchangeablitly 1968 9.5HP Sportwin with what else ???

    Does anyone know what years (and size engines) I should search to replace my tiller on my 1968 Sportwin. I thought that I read that you could use 1963ish thru 1974ish but maybe some expert out there know exact years and which size motors I should be looking for. Also, are there any dealers...
  10. bobgritz

    Top Cylinder Misfiring ...

    My 1983 Johnson 15hp engine has developed a hard starting and stalling problem. When cold and first starting, it floods easily and you can only pull out choke briefly. If it doesn't start immediately it becomes saturated with fuel and it is very difficult to restart. It is electric start and I...
  11. bobgritz

    Great Spark But Won't Fire ...

    I picked up a cheap Mercury 9.8 HP (Mod. 110) and seller said it sat for quite a while and wouldn't keep running and needed carb rebuild. He squirted starting fluid in carb throat and vroooom ... it fired right up for about 2 seconds. Terrific. EZ fix. Got it home, left it on the garage floor...
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