keithb7's latest activity

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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    Tried swapping the spark plug coil wire positions. No improvement. Also coils (2 qty) tested in spec. Flywheel keyway is in place. As...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    Are you using the Choke? Yes. With or without the choke. Made no difference. If I remember, the Fuel Pump is integral to the Carb, and...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    I just studied my Mercury shop manual here again to confirm. There are no published tolerances for piston clearance. No compression...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    To clean the piston grooves I broke off a piece of the removed piston rings. I used it to scrape out any carbon. Honestly the engine...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    I used a 3 finger, sprung, straight-style home. I performed a quick hone. Not over-doing it. The carb float was set as per factory...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    Someone told me they were low compression. I am doubting that. I have since seen folks on-line measuring 110 psi. The break-in exercise...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    I spent 2.5 hours out on the water today. Breaking-in the engine. When I got home I measured 75 psi still. Seems odd to me after a light...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    Thanks for your responses folks. I feel like I solved it. It was indeed low compression. I lightly honed the cylinders and installed...
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    keithb7 replied to the thread Stubborn To Start 1979 9.8.
    The issue appears to be compression. I put oil in the cylinders and raised compression to 110 psi. She’ll run. I’ll see if seating the...
  • K
    keithb7 posted the thread Stubborn To Start 1979 9.8 in Mercury & Mariner Outboards.
    Affer a powerhead refresh, my 9.8 won't start unless I squirt some raw fuel into the carb intake. Then it'll fire up first pull, sound...
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    keithb7 replied to the thread My 1979 9.8 Project.
    With the weather improving weekly, I look forward to getting out and testing my Merc rebuilds. I’m curious about the HP rating at the...
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    keithb7 replied to the thread My 1979 9.8 Project.
    My local Mom & Pop shop had 2 full sets of brand new original Mercury reeds. Under about 3” of dust. The shop has been awesome with...
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    keithb7 replied to the thread My 1979 9.8 Project.
    Thanks for that max clearance spec on the reeds. I’ll measure my gaps. Pretty sure its over 0.010”
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    keithb7 reacted to merc850's post in the thread My 1979 9.8 Project with Like Like.
    Here's the truth about reed valves: if one or more are stuck open, broken or chipped that might cause carb firing.
  • K
    keithb7 replied to the thread My 1979 9.8 Project.
    Cleaning up my 1979 9.8 noticed an engine SN on the powerhead. Canadian build. Was it typical for the SN to end with the year of...
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    • IMG_1982.jpeg
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