PHP Warning: Use of undefined constant VBA_SCRIPT - assumed 'VBA_SCRIPT' (this will throw an Error in a future version of PHP) in ..../includes/functions_navigation.php(802) : eval()'d code on line 1 Sterndrive Problem - Any Mechanics?
Have a problem with a Volvo 5.0L Carb engine. It is fitted to a 2000 Glastron GS249 Sportscruiser, in warm climate.
The boat has always been dry stored and flushed regularly, with regular use (500 odd hours).
Had no problems with the rig when it was layed up on the hard for around six months, while it was for sale. It was regularly started with fresh water and run till warm during this period.
Once sold, and on delivery, first time back in the water on trailer during launch, the engine ingested water and hydro locked. Thought it was an isolated incident due to ramp/trailer/piston angles, and cleaned out engine and got going again.
Launched again, put on about six hours with no problems. Third outing since launch, anchored overnight (new owner), and it ingested water again.
Pulled on hard, cleaned out again, got running, then pulled manifolds and risers down for inspection.
All seemed to be in quite good condition, apart from one gasket which could potentially be letting water in. Apart from that, to the naked eye, all seemed reasonable.
On both occassions, water was in all cylinders, but never made it down into the sump.
Apart from replacing manifolds and risers (which we are doing anyway), does anyone have any other ideas on what could be happening to cause this issue.
Last thing we want is to do all that work and find the problem still exists?
Hmmmm We got a 21 footer with a Volvo V8 shaft drive 3.6 litre fully alloy every thing. On both sides of the exhaust there is a heavy metal flap which closes off until exhaust pressure pushes it open and vents both water and exhaust. On the Inside of the transom both pipes rise up way above water level and then come down to floor level, through the muffler where the exhaust uses 3 inch rubber pipe until it gets to the exhaust manifolds.
By the way it sounds fantastic these motors idle at 250 Rpm and rev out to over 6k. Wish me outboard would sound that good.
Okay I should say it has never had the heads off in over 40 years but the exhaust has melted due no cooling water getting through at one stage.
But this boat has always been trailered away from the ramp it's never been moored. Mind you nearly sunk many times as shes a timber clinker hull and it can take a while for the boards to swell up and make her water tight again.
But never had water get up in to the block...... Oh hang on ours was a carby model but ordinary choke! Have you got a water cooled carby for the auto choke if it has one that could fill your block with water if shes rusted through.
Last edited by Roughasguts; 12-05-2008 at 10:41 PM.
Water in all pots in my opinion has to get in via the intake manifold. It would be unlikely that it has 2 cracked heads and even if it did the cracks would be to 1 cylinder normally (1 cylinder per head so 2 cylinders with water).
Failing it being the intake then the only other possibility is the exhaust system but then water would only have gone into the cylinders with their exhaust valves open so not all 8.
How much water are we talking per cylinder? Are you sure it didn't get in when you pulled the heads off? Is it ht esame volume more or less in each cylinder?
Hi darren i have a volvo/penta/chev 5.7 injection/vortec here at the moment that has a similar problem with the injestion of water.These motors have a 4 into 1 manifold that can fill more than 1or 2 cylinders if the manifold has worn thru with rust.i doubt that all 8 cyilinders will have the pots full of water.Sometimes when you back off and the flappers are ceased or rusted it can get a gut full of water.I have found the states are the cheapest at 500 for the set(us made)....jim
darren been thinking bm might be correct with it coming in thru the inlet manifold.That would figure that the 8 pots would be choca block. cheers..jimbo
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