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Jon and V Boat Conversions & Modifications
YJs 1236 Semi V Mod
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<blockquote data-quote="SumDumGuy" data-source="post: 369356" data-attributes="member: 12459"><p>Yes, you should peak the pressure reading.</p><p>Snagged this from another site:</p><p></p><p>Procedure for Testing:</p><p></p><p>- Turn off the fuel valve or make sure fuel is not present in the cylinder.</p><p>- Disconnect one spark plug wire from the spark plug at a time. Don't mixup the spark plug wires. Be sure to ground the spark wire when testing the compression. Cranking the motor with the plug wire hanging free can ruin the coil.</p><p>- Screw in the tester with the appropriate adapter into the spark plug hole.</p><p>- Crank the motor over with the pull start about 4 to 8 times at normal starting speed. Watch for a stabilized peak pressure on the gage. This is the compression value for the cylinder.</p><p>- Release the pressure on the gage.</p><p>- Repeat to other cylinders.</p><p></p><p><a href="https://www.pochefamily.org/outboard/Checking%20Compression.html" target="_blank">https://www.pochefamily.org/outboard/Checking Compression.html</a></p><p></p><p></p><p></p><p>Last photo is the best. Looks good seeing it on the boat. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="SumDumGuy, post: 369356, member: 12459"] Yes, you should peak the pressure reading. Snagged this from another site: Procedure for Testing: - Turn off the fuel valve or make sure fuel is not present in the cylinder. - Disconnect one spark plug wire from the spark plug at a time. Don't mixup the spark plug wires. Be sure to ground the spark wire when testing the compression. Cranking the motor with the plug wire hanging free can ruin the coil. - Screw in the tester with the appropriate adapter into the spark plug hole. - Crank the motor over with the pull start about 4 to 8 times at normal starting speed. Watch for a stabilized peak pressure on the gage. This is the compression value for the cylinder. - Release the pressure on the gage. - Repeat to other cylinders. [url]https://www.pochefamily.org/outboard/Checking%20Compression.html[/url] Last photo is the best. Looks good seeing it on the boat. :) [/QUOTE]
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Jon and V Boat Conversions & Modifications
YJs 1236 Semi V Mod
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