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Old 24 September 2005, 13:03   #31
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I'm really getting pissed with my Merc......Wish I'd stayed with the Yam!

Went out today, got water in the cowel from somewhere (think it's from stopping and the stern wave hits the rear end), anyway the stutter thing is back, it's gotta be connected!

Any Idea's guys?
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Old 24 September 2005, 13:24   #32
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Yes - avoid the stern wave hitting you up the stern by planning your stops!

Either slow down more gradually, or do a wiggle on the wheel before you stop, or give the throttle quick blip to "kill" the stern wave (that's the most effective).
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Old 24 September 2005, 13:27   #33
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I am sorry to hear about your trouble Andy send me full description on the problems by pm or email and I will have word with our technicians on Monday.

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Old 24 September 2005, 14:09   #34
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I've tried every trick in the book in preventing the stern wave from crashing into the transom but it keeps on comming, the most effective is a tight 180, but you can hardly execute that in every stop.

Thanks bogi, your a gent! I've E mailed you about the check valve and will compile a description about the stutter prob later this weekend. .
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Old 24 September 2005, 15:42   #35
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is it coming in through where the lid meets the lower section?
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Old 24 September 2005, 15:51   #36
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Quote:
Originally Posted by Hightower
I've tried every trick in the book in preventing the stern wave from crashing into the transom but it keeps on comming, the most effective is a tight 180, but you can hardly execute that in every stop.

Thanks bogi, your a gent! I've E mailed you about the check valve and will compile a description about the stutter prob later this weekend. .
how about when you slow down just keep a little bit of speed on to keep forward of the bow wave and then drop down to 0, does that not work either?
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Old 24 September 2005, 16:39   #37
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when you find the water in the cowl, what components are getting wet?
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Old 24 September 2005, 17:53   #38
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It's almost better to slow from a higher speed as there seems to be quite a large dip at say 5 knotts. The back of the RIB isn't getting swamped but it does come up above the coweling on the outboard which is what I'm trying to prevent.

The seal around the casing is intact and appears a good fit just under the coweling I can't help feel it's getting in else where. I've painstakingly gone around the seams at the back and sides of the casing with a little tube of black silkoflex but there's some water getting in somewhere!

As far as I can see the water isn't getting to any of the electricals and as I've just recently had the Carbs cleaned and the bottom one reported as having salt cystals in, I have to assume it's that one again. She ran fine last time out (with no water in cowel)! It just has to be connected!

Andy
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Old 25 September 2005, 04:56   #39
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So the water could be getting into the bottom carb then? Whats the seal on the airfilter like? on my engine the carbs are at the front and the air cleaner bolts onto them with the inlet at the very top. however where each bell mouth pushes into the filter there is a decent seal. Also where is the air intake in the cowling? Can't make it out from pics of your boat!
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Old 25 September 2005, 05:12   #40
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Well here's the thing! If water is indeed getting into the carbs surely it's going though the inlet, the same path that the air goes. Because water is heavier than air it sits at the bottom of the air box and slowly trickles into the bottom carb, possibly going into the jet area and upsetting the running at low revs.

The air intake on the coweling is at the top and rear and as far as I can see shouldn't let water in unless a stern wave swamped the outboard. Inside the cowel the inlet for the carbs (air box) is at the front of the engine with a large opening going from roughly inline with the top of the block to where the control cables enter the the rear, water could be comming though the bottom of the vent but it would have to be quite a high water level to do this or drops of water thrown around by the motion of the boat.

I'm just going out to have a further look and might takke some photo's of the layout.

Andy
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