Is the flapper on my boat too big?

Heath Heller asked a question: Is the flapper on my boat too big?
Asked By: Heath Heller
Date created: Thu, Jul 22, 2021 7:03 AM
Date updated: Thu, Jun 30, 2022 7:30 PM


Top best answers to the question «Is the flapper on my boat too big»

  • Flapper was about 1/32" too large and needed to be trimmed. Otherwise good. Revised: the material is thicker and quite a bit more rigid than the original flappers on my boat, and are constantly getting clogged with even the smallest amount of debris, making them either stick open or closed. Neither situation is ideal.

10 other answers

I told my friend to check the impeller, too. You can read more about those here.) Also, when the flapper valve is burned, it’s possible some of the exhaust hoses also have burned, so I told him to inspect those, too. It’s too bad he wasn’t aware of the rubber bits in the exhaust system before he bought the boat.

We love it. My old boat had the Volvo GXI duo prop. This new one has the 496 mercruiser mag with bravo 3. My question for those in the know is this.....I found the rubber flapper in the exhaust bellow. I found it just before a big trip on georgian bay. I did my trip without incident and I have put my boat back in Lake Simcoe.

Check local laws to be sure. Depending how the boat is built you may be within the "engineered" safety tolerance. If it is legal and you are worried about safety then don't use the full power of the motor. Avoid gunning it hard, don't run top speed, the boat will do up to a certain speed with the 115 so doing that same speed with the 150 wouldn ...

That said when I wanted to go bigger on my Skeeter I couldn’t find anybody who cared. The DNR I talked to sure didn’t. I’ve never been checked on the water on what size my boat was rated for. What you will find is NO DEALER will hang it. They are afraid of the liability. So, if you buy the motor and hang it yourself you will be OK…

My boat has exhaust flappers! But for a completely different reason. They're called exhaust shutters. They prevent the back-flow of water into the engine which would result in hydro-lock. Basically water forced into the cylinders if you suddenly stop the boat too quickly. This is a very bad scenario!

No, you can't double up on a 3/4" outlet because its too small and will not handle the increased flow and will restrict the pumps. Just buy a larger fitting and increase the existing hole size. If you find it easier to drill another one, by all means do that.

If the beam of your boat is greater than 8’6″ wide, or the boat on the trailer is greater than 13’6″ high (in most states) then it is considered an oversized load. All states require permits on oversized loads but each state differs on what their requirements are pertaining to when and how many escorts may be needed.

The larger the boat, the higher the price tag and operating costs. Your answers to the following questions will clarify the ideal size boat to buy. 01. of 03. How Big, or Small, of a Boat Do I Need? Because you want boating to be fun, you will want to purchase a large enough boat to meet all your needs. In the case of a family of four, space ...

But remember, especially sail boat owners, that too much riser greatly affects the pump's capacity. A pump located three feet below the waterline, with a 24" riser (sailboats need this much), for a combined rise of 5 feet, will have its pumping ability reduced by more than 50%.

This causes two problems. (1) it reduces cooling water flow through the whole engine and causes engine overheating, or (2) it can cause the exhaust system to starve for cooling water, overheat, and possibly setting the boat on fire. Neither make for happy days.

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