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Forums / Restoration / Outboard in well  
The discussions for this thread include the following:

Posted: 18 Jul 2012 at 11:30pm
I have found that my 10 HP Honda does notm like being in the outboard well of Mandalay a Pacific Dolphin. It seems to surge and die down to the point you think it is going to quit and then it surges back up to normal speed. My partner ( I am the New partner) tells me he had the same problem last year. Last week i did a sail across the Georgia Strait from Gibsons to Nanaimo on Vancouver Island and was thankful there was enough wind to make it in 5 hours but the little I did motor I had this problem. On the return trip I had my Grand daughter on the tiller and I went up to the bow and noticed the engine ran normally. I am wondering if it is sucking exhaust gases in to the carb and starving for air. When on the bow the OB well has more space at the waterline to let the exhaust out. Has anyone experienced this problem?

Posted: 20 Jul 2012 at 1:16pm
Hi Char
I think, and as you suspect, that your engine is starved for fresh air/oxygen by the back up of exhaust gases in the well. When I am motoring in #12 I have my top hatch up and a forward panel removed. There is more about this in the Technical Section/Outboards


in particular check out


Fixes range from a new motor with exhaust out thru the prop ($$$$), to better exhaust systems out of the well, and better air intake. Maybe an exhaust fan if simple hooded vents are insufficient. Also, making sure the motor is running efficiently helps reduce excessive exhaust gases

Marionette, #12

Posted: 09 May 2016 at 10:12pm
I used a two stroke Suzuki 8 hp and had this problem too. Noise was one problem and I couldn't shut the lid while under power. To quiet the exhaust I taped wax paper over the exhaust outlet holes on the back of the lower unit and laid up a piece of glass about. 1/4" thick. Then I waxed up a piece of PVC about 1 1/2" dial and wound wet fiberglass tape around it. When it hardened I punched out the PVC and the bored a hole in the flange I had made and bonded the tube to it with a slight downward angle. I then drilled two holes in the flange and drilled and tapped two holes in the lower end. I used alumalastic and two stainless #10 Phillips round head screws to hold it on. I gooped the flange with caulk and screwed it onto lower end. That adventure exhaust come out just under the waterline which meant that as boat moves the exhaust came up behind boat, not IN well. Next I drilled a hole in the side of the engine cover and used a PVC fitting and 3M 5200ed it into place. To this I connected a flexible hose and fit it to the clamshell scoop or duct facing aft that helps ventilate the lazarette. I chose not to hook it to the forward facing vent because of fear of water entering the hose and the engine cover in rough conditions. Now I was able to close the lid and run the engine with very little noise and no fumes in the cockpit while underway.
john barbara joyce

Posted: 21 May 2016 at 7:25am
I tied a small hook to a thin line about 8 or so inches long. That is tied to the backstay with a loose bowline. When motoring, i lift the line and hook the rear hatch. This holds the hatch up temporarily though it does come crashing down occasionally if i am going through rough water. The hook is similar to the hooks That connect a dog license to a collar

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