Deduction of Ingress of Water into Unibond Hull from Observation of Static Trim Waterline Relative to Transom Drains or Rise of Water in Hull Sump Compartment

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  Deduction of Ingress of Water into Unibond Hull from Observation of Static Trim Waterline Relative to Transom Drains or Rise of Water in Hull Sump Compartment

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Author Topic:   Deduction of Ingress of Water into Unibond Hull from Observation of Static Trim Waterline Relative to Transom Drains or Rise of Water in Hull Sump Compartment

gmoulder posted 05-06-2014 09:50 PM ET (US)
How do I tell if I have water in the hull of my 1988 Outrage 18? Today, I was alone in the boat in Clear Lake, Texas, with 3/4-FULL tank of fuel, and water was over the middle transom drain by about 1-inch. The starboard quarter sump, with plug out, was filled to about 2-inches from top of sump. These observations taken while not underway.
Thanks, Glen
AZdave posted 05-07-2014 03:02 AM ET (US)
Those water levels sound OK. We usually used a plug on the starboard sump. The water level on the transom will vary depending on loading and the position of the crew/passengers. It is surprisingly difficult to get a definitive answer to concerns about water in the hull. I weighed the hull and trailer on a commercial scale and figured out the tongue weight on the trailer. The weight of your hull should be posted on this site, but it does not include modifications made after manufacture. The weight of the trailer, batteries, and other equipment have to be added. There is some margin of error in all of those weights. If you spend a lot of time poking around Whaler sites, you may find the suggestion that some hulls were heavier than the published weight. If your Outrage performs well, stop worrying about water and enjoy.
jimh posted 05-07-2014 03:42 PM ET (US)
I don't know how to set a standard for your boat. Certainly the weight of the outboard engine, the battery weight, your weight, and many other influences could alter the water line of the boat in its static trim. I don't think the location in Clear Lake, Texas has much influence, but the water salinity and temperature will have an effect.
How you could deduce the amount of water ingress into the Unibond hull from these observations is hard to predict. For example, the hull could be badly waterlogged in the bow, and your stern might float several inches higher.
I don't see too much promise in the method, and, particularly without any details about the engine weight and other weights.

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Author	Topic: Deduction of Ingress of Water into Unibond Hull from Observation of Static Trim Waterline Relative to Transom Drains or Rise of Water in Hull Sump Compartment
gmoulder	posted 05-06-2014 09:50 PM ET (US) How do I tell if I have water in the hull of my 1988 Outrage 18? Today, I was alone in the boat in Clear Lake, Texas, with 3/4-FULL tank of fuel, and water was over the middle transom drain by about 1-inch. The starboard quarter sump, with plug out, was filled to about 2-inches from top of sump. These observations taken while not underway. Thanks, Glen
AZdave	posted 05-07-2014 03:02 AM ET (US) Those water levels sound OK. We usually used a plug on the starboard sump. The water level on the transom will vary depending on loading and the position of the crew/passengers. It is surprisingly difficult to get a definitive answer to concerns about water in the hull. I weighed the hull and trailer on a commercial scale and figured out the tongue weight on the trailer. The weight of your hull should be posted on this site, but it does not include modifications made after manufacture. The weight of the trailer, batteries, and other equipment have to be added. There is some margin of error in all of those weights. If you spend a lot of time poking around Whaler sites, you may find the suggestion that some hulls were heavier than the published weight. If your Outrage performs well, stop worrying about water and enjoy.
jimh	posted 05-07-2014 03:42 PM ET (US) I don't know how to set a standard for your boat. Certainly the weight of the outboard engine, the battery weight, your weight, and many other influences could alter the water line of the boat in its static trim. I don't think the location in Clear Lake, Texas has much influence, but the water salinity and temperature will have an effect. How you could deduce the amount of water ingress into the Unibond hull from these observations is hard to predict. For example, the hull could be badly waterlogged in the bow, and your stern might float several inches higher. I don't see too much promise in the method, and, particularly without any details about the engine weight and other weights.