Recent content by NoEcm

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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Old parts on the left and new parts on the right: The impellers are the same as I did a water pump R&R a few years back. However, the stainless steel liner in the new kit is one piece and the old one was 2 pieces. All...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) I used a box knife to cut the rubber vanes off the collar: I found the sweet spot where the "key" was installed and I used a rotarty tool to cut a slot in the collar: Next, I used a screwdriver and with a little twist...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Exhaust cover installed with the water pressure elbow for the gauge pointed forward: Figured this would be the end of this thread as a simple water pump R&R has been covered many times over in this forum and there would...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Masked up and painted. When fully dry, the finish will be a satin black: Fully assembled with the new tell tale hose in place. Wanted to make sure the hose was routed so that all the water would drain out of it when in...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Here is a seller added description of the kit that I bought: And in looking at the factory parts diagrams, 1996 was the first instance I could find where the Water Pump Indicator was officially moved to the top of the...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Head re-installed: -Bolts torqued down to 225 inch pounds -New head gasket -New thermostat -New "Red" Spring installed How many running hours should I have before I retorque the head and exhaust cover bolts?
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Excellent thought and probably so Not sure but it came with the kit so I installed it. No part number that I could find but I think I could find something similar at the harware store. All this grommet does is hold the...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) The old restrictor and the grommet that replaces it: And the new hose: And what the grommet looks like installed: The new hose coming from the top of the block goes right through new grommet.
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) With the Cylinder Head removed you can see where the salt penetrated the head gasket: And where the salt leaked through the gasket onto the head: A well worn .38 caliber cleaning brush works great for cleaning the...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) The original Service Bulletin says "Grease the tips of both the drill and tap to prevent aluminum chips from entering the cooling system". After performing the drilling and tapping myself, there would have been no way I...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) I pre-marked the new location of the tell tale elbow before disassembly: Taping the hole for the new elbow (1/8" Pipe thread):
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Here's what it looked like after it was removed: Chasing the threads to clean them up: The inside of the exhaust cover after bead blasting:
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) Here's what the inside of the exhaust cover looked like: The old tell tale elbow needed to be removed also: After 20+ years of salt water use the elbow was frozen in there so I ended up burning it out with a propane torch:
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    Re: 1988 70 HP Johnson Cooling System Modification (+ Additional Work) After taking photos from every angle so I would remember how everything goes back together, the first thing I did was work on getting the exhaust cover off. I didn't pay much attention to that rusty bolt in the lower left...
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    1988 70 HP Johnson Cooling System Modification (+ Additional Work)

    The Victim: 1988 70 HP Johnson. J70ELCCA Purpose: Water pump R&R Inspect/clean cooling system passages Implement OMC Service Bulletin 2276 (Cooling System Modification). Here is the Service Bulletin: The Kit: OMC Water Pump Kit 432955 (includes the parts necessary for the cooling systems...
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