Adding New Bulkhead for 22-foot Hulls with Narrow Splash Wells
Posted: Tue Apr 06, 2021 1:41 pm
While researching the possible use of transom boards to prevent water from coming over the transom of my 1980 Revenge 22, I developed another solution for 22-foot boats that have the narrow, sink-style engine splash well instead of the full width engine splash well used on later 22-foot hulls.
My solution was to put the main engine on a jack plate which moved it off the stern by 5-inches more clearance while at full tilt. This allowed me to make a new cockpit bulkhead at the inboard edge of the original engine splash well dam. Next, to prevent water catching on each side of the stern, I raised the deck height to match the height of the original engine splash well dam.
To create drains for the cockpit, I added five fiberglass drain tubes of 1-1/4-inch-inside-diameter at deck level across the new aft cockpit bulkhead. The center three tubes drain into the original engine splash well.
To create the new aft cockpit bulkhead I used 1/4-inch marine plywood that was completely sealed with West Systems epoxy and one layer of fiberglass. For strength I doubled the plywood at the bottom on the inboard side.
The top [of the aft cockpit bulkhead is] is 1-inch by 5-inch mahogany, which attaches to the boat's original mahogany gunwales. For extra strength the entire bulkhead is fared in place with West Systems Six10 epoxy.
My Evinrude 225 does not have a tilt limit switch so I made a door [in the new aft cockpit bulkhead that can] open for clearance at full tilt of the engine.
You will notice in the Figure 2 and Figure 3 the fuel line now passes through the original dam of the engine splash well. I drilled through [the original splash well dam] and epoxied in place a stainless steel nipple.
This new bulkhead creates nice place to install a water-fuel separating filter out of the way and above water level.
My solution was to put the main engine on a jack plate which moved it off the stern by 5-inches more clearance while at full tilt. This allowed me to make a new cockpit bulkhead at the inboard edge of the original engine splash well dam. Next, to prevent water catching on each side of the stern, I raised the deck height to match the height of the original engine splash well dam.
To create drains for the cockpit, I added five fiberglass drain tubes of 1-1/4-inch-inside-diameter at deck level across the new aft cockpit bulkhead. The center three tubes drain into the original engine splash well.
To create the new aft cockpit bulkhead I used 1/4-inch marine plywood that was completely sealed with West Systems epoxy and one layer of fiberglass. For strength I doubled the plywood at the bottom on the inboard side.
The top [of the aft cockpit bulkhead is] is 1-inch by 5-inch mahogany, which attaches to the boat's original mahogany gunwales. For extra strength the entire bulkhead is fared in place with West Systems Six10 epoxy.
My Evinrude 225 does not have a tilt limit switch so I made a door [in the new aft cockpit bulkhead that can] open for clearance at full tilt of the engine.
You will notice in the Figure 2 and Figure 3 the fuel line now passes through the original dam of the engine splash well. I drilled through [the original splash well dam] and epoxied in place a stainless steel nipple.
This new bulkhead creates nice place to install a water-fuel separating filter out of the way and above water level.