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I have a 2001 90TLR. motor runs good. I was doing maint. on the thermostat yesterday and after scraping some salt off of the lip, I hooked up the water and started the engine just to let water pump out the hole to flush the debris off. just let it run 5-10 seconds then turned it off. that is when I noticed exhaust gas swirling up through the thermostat hole...Put everything back together and run it on the hose with no issues.
My main concern obviously is that if exhaust can get into the water, can water get into the exhaust Ie:-cylinders... Got to thinking about which gaskets this could be... naturally head gasket was first to pop up. went out this morning and pulled all the plugs. all of them are oily (not bad, just standard 2-stroke) none of them are wet or clean like water is in the cylinder. did a compression check 125 on all 3 cylinders. let the water run through the flushing adapter for a while, no evidence of water getting into the cylinders. cranked several times with no plugs in..again no evidence of water seeping in.
Finally, I pulled the water hose off where the flushing adapter goes into the block. ran it for about 10 seconds without water hooked up and there was exhaust gas pumping out of the fitting on the block
So can someone point me in the right direction here? What else do I need to be looking at?
My main concern obviously is that if exhaust can get into the water, can water get into the exhaust Ie:-cylinders... Got to thinking about which gaskets this could be... naturally head gasket was first to pop up. went out this morning and pulled all the plugs. all of them are oily (not bad, just standard 2-stroke) none of them are wet or clean like water is in the cylinder. did a compression check 125 on all 3 cylinders. let the water run through the flushing adapter for a while, no evidence of water getting into the cylinders. cranked several times with no plugs in..again no evidence of water seeping in.
Finally, I pulled the water hose off where the flushing adapter goes into the block. ran it for about 10 seconds without water hooked up and there was exhaust gas pumping out of the fitting on the block
So can someone point me in the right direction here? What else do I need to be looking at?