Bad crank seal on outboard, Checked the jets ect also
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Bad crank seal on outboard, Nov 14, 2016 · A badly leaking crankshaft seal lets crankcase pressure escape and air entry into the crankcase. After removing several mouse nests & one dead squirrel, I got the boat cleaned up. Just some gel looking matter. Jun 16, 2025 · Crankshaft Seal Failure and Replacement The soft and pliable marine crankshaft seals also exhibit signs of wear and tear after a specific number of maintenance hours. to/3TE48GZ Mityvac Pressure & Vacuum Tester - https://am. Home - ThumperTalk Jun 14, 2010 · Re: Bad crankshaft seal or seals on 9. <br /><br />You dont need to strip powerhead. It's a lot easier to diagnose - pop the flywheel off and if there's oil everywhere, check the seal. Sep 15, 2017 · Mumbles posted a You Tube video of what the bad top crankshaft seal looks like with outboard oil applied. Checked the jets ect also. Nov 12, 2015 · They told him the news of bad crank seals & gave him an estimate of $2800 to replace the engine. So he towed the boat back home unrepaired and it sat there until I purchased it & brought it home this past spring. Check serial number for any open recalls or bulletins. Aug 31, 2011 · Hello , what would be the symptom of a bad crankcase seal ring? 1997 mercury efi is hitting harder on #5 and barely hitting on #6, I have good fire and already swapped the injectors, I thought mybe a worn seal ring on the crankshaft? Thanks for any info, Tim. Lower seal carrier is held by three small bolts. Took it out locally and it ran great, starting on the first pull. TOOLS I USE:Engine Tachometer - https://amzn. A couple of bolts underneath ( 6 I think ), and two nuts above, at sides of powerhead, a bit tricky to get at. Jan 18, 2006 · Re: crankshaft seal A bad top seal will often cause ignition problems on that outboard because the oil it spews will contaminate the points pretty quickly. Apr 11, 2004 · Re: Lower Crankshaft seal bad?? Wkoch<br /><br />If lower seal IS your problem, its replaceable without disassembling a lot. How to remove and install 2 stroke crankshaft oil seals. <br /><br />A bad bottom seal is trickier. 9? OK, you want to know if one of the two crank seals is bad, and more importantly, if you have good crankcase compression, right? We would like to show you a description here but the site won’t allow us. Pull powerhead. When I first bought it, I had to remove the carb, and clean the bowl. No sign of abuse and looks almost new condition. A sealed crankcase is essential for two-stroke operation, especially at cranking or slow speeds. Took it up north and Mercury had a recall on them when they first came out with the new 4 stroke v6 & v8 models for the crankshaft seal under the flywheel. In summary, the video underscores the significance of crankshaft seals in 2-stroke engines and how their leakage can lead to engine bogging down and other operational issues. It cleaned up good. Oct 6, 2019 · 1994 Yamaha 8HP two stroke. Nothing serious.
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