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#1
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engine or outdrive leak
gentlemen,, have a 21v with 488 4 clyinder merc. io. problem = engine compartment slowly filling with water. checked all exhaust connections and hoses etc. water is warm pointing to exhaust discharge issues, io external exhaust bellow is broken,but do not think water will back up thru exhaust. stumped on this one. any suggestions? thank you richard
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#2
06-25-2009, 10:35 AM
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I'm not too sure about I/Os but here goes.
To try and narrow this down I have several questions for you: 1. Does it leak when the motor is running or not? 2. Does the water have a gas or exhaust smell? 3. Does it leak when on muffs or only when in the water? This should help to eliminate the bellows or narrow it to the bellows.
__________________
'78 Cuddy with '82/'88 Johnny/Rude 150 
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#3
06-25-2009, 11:42 AM
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water leak
with eng. running water comes in up to stringer height. unable to tell when water enters after water is present in eng. compartment. no smell to water or fluids etc. could it be leaking thru bell housing? amt of water reaches depth of 1 foot in about 90 mins. water is warm probably due to reaching underside of eng. or it is exhaust water. baffled
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#6
06-25-2009, 10:07 PM
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water leak
gentlemen, boat is not on hose. lower exhaust bellow has tear in it, upper bellow newly replaced also shift cable bellow replaced. i was informed by a merc tech that even though the lower exhaust bellow may be ruptured it should not allow for water to back into exhaust. said it acts as a silencer on noise and directs water to exit thru outdrive. that said, where is the water coming from? beats me fellas thanks richard
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#7
06-25-2009, 10:22 PM
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Explain the leak better for us. When exactly does it leak? Only with the engine running? Will it leak with it not running? If it only leaks while it is running, pull it out of the water and run it on a hose and see if it still leaks. You first need to isolate wether it is a hull leak or a cooling system leak and go from there. If it is a cooling system leak then let it sit for awhile and dry off and empty the bilge of water. Then run it for a few minutes and watch to isolate where the water is coming from on the engine.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#8
06-25-2009, 10:53 PM
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water leak
excellent idea. will connect with hose with dry bilge, engine running & look for engine leaks. that should isolate it to hull fittings or bell housing. noticed pickup for live well pump is below bell housing, that may also be the culprit thanks again fellas will return with findings asap richard
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#9
06-26-2009, 05:52 AM
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look at the exhaust tube, from the riser down to the transom plate, it a has a joint about halfway down that could be leaking. Check teh rubber exhaust hose connections, they coiuld be leaking while the engine is running. ALso pay attention to the area around the input shaft, where it comes thru tha transom plate. One more place to look is move the water hose on the outside of the transomplate, where it sits up against the out plate, it can pocket corrosion behind it and you won't see it till you move the hose
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