1. Diurnal Emission Control October 7th, 2008

2. Sources of Hydrocarbon Emissions 2 1.Permeation – through fuel tank walls 2.Spillage/Spitback – during fuel fill 3.Exhaust – during engine operation 4.Diurnal emissions – due to daily temperature cycles

3. California/EPA Diurnal Emission Limits 3 Trailerable boats (<8.5ft beam & <26ft LOA): Less than.4 grams per gallon per day of hydrocarbon emissions. Non-trailerable boats (>8.5ft beam or >26ft LOA): Less than.16 grams per gallon per day of hydrocarbon emissions.

4. How to Meet Diurnal Emissions Standards 4 Utilization of a carbon canister system Currently the standard in the auto industry Fairly easy installation with low risk Pressurized fuel system (1 psi) Higher risk if connections fail – potential of significant fuel leakage in hull of vessel May require alternative fittings or connection methods Currently not recommended by the USCG

5. Carbon Canister Basics 5 Required size of canister is determined by the length/width of the boat as well as the capacity of the fuel tank Liquid water must not enter the canister Adequate care must be taken so that liquid fuel does not enter the canister The canister should be mounted above the top level of the fuel tank “Marine Grade” carbon is required ABYC requires that the vent line be “self-draining”

6. Carbon Canister Sizing 6

7. Carbon Canister Available Sizes 7 1L 1.5L 2L 3L 4L Two or more canisters can be “daisy chained” together for increased capacity or to facilitate installation

8. Installation Examples 8 Recent high-performance builder carbon canister installation examples:

9. Installation Examples 9

10. Fit-up Key Findings 10 Diurnal emission control does not allow for a “component solution”. A system perspective is required.

11. Generation 1.0 Fuel System -- 2009 11

12. 22SEP08Brunswick Confidential Sean Whelan Product Development Engineer Hardware, Fuel & Trailering Categories phone/fax (616) 897-2275 / (616) 897-2218 In Line Surge Protector P-Trap 2L Carbon Canister

13. Key Installation Notes Builders will need to ensure no water of fuel comes in contact with the carbon canister A P-Trap vent or similar device should prevent water intrusion Surge protectors are needed to prevent fuel from entering the canister 13

14. Summary 14 Each boat application presented different challenges, builders should not wait until the last minute to spec in the system There are alternative ways to meet various EPA guidelines, talk with your fuel system provider ahead of time to understand your options and minimize costs The proposals are now implemented, builders can’t take a wait and see attitude We recommend partnering with a systems provider vs. component supplier to ensure your boats meet the latest fuel system regulations

15. 15