please help. boat overheated. need advice
05-07-2015, 07:51 PM
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please help. boat overheated. need advice
Hello and thanks for looking. I have a four Winns liberator. It has a 260 HP 350. It overheated today on the lake. Was smoking quite a bit. I let it cool down and babied it to the dock. Boat began running very weak all of a sudden which is how I discover the overheating. I could hear water boiling in the exhaust. After cooling boat started and made it back to dock. But with no power. Wouldn't even plain off. I checked the oil for water and there is no water in it . any help appreciated thank you.
05-07-2015, 08:42 PM
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The 'lucky' minimum by your description is head gaskets. Do a compression test. 4/6 and or 3/5 are prob leaking combustion into each other.
05-07-2015, 09:03 PM
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If that engine got that hot to start smoking-- not good at all.
you may want to look in the bilge and see if there is any substantial water -- cracked the block, manifold etc.
I wish you all the best
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05-07-2015, 09:21 PM
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And I would not re use the risers and the exhaust manifolds on a repower / rebuild. This most likely is close to a 27 to 30 year app having a Mercruiser in it. Also IF APPLICABLE - the exhaust Y pipe will need to be check out very closely and 4 sure change the heart shape O ring gasket at the bottom flange to the inner transom assembly. So many people miss that one after a hard overheat doing the repower / rebuild . Just saying. IMO I think the motor is hurt internally in some shape or form like others have posted
05-08-2015, 03:06 AM
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Thank you guys. I will be doing a compression test tomorrow. The motor was already tired before only having 100lbs per cylinder. I'll post tomorrow let ya know what I come up with. Anyone off hand know the firing order? Its a 1986.
05-08-2015, 06:27 AM
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1-8-4-3-6-5-7-2
Every guy should know those numbers more than their own b-day, right behind Jenny's number.
Every guy should know those numbers more than their own b-day, right behind Jenny's number.
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Last edited by US1 Fountain; 05-08-2015 at 08:20 AM.
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05-08-2015, 09:23 AM
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OK here is the test real quick what is a marine GM base small block with reverse rotation firing order ? there is a very simple simple way to remember this if you do not know it but know the standard firing order.
Last edited by BUP; 05-08-2015 at 09:25 AM.
