hi peggie, thanks for the reply and advice. i ordered a copy of your book. i was reading an article in the c34 forum that you wrote and noticed you wrote that the vent hose from the tank should be the shortest, straight lead out possible. i think the past owner redirected the vent situtation from straight out into a stantion post, to a travel about 20' to a stern vent. the hose goes up inside the hull, makes a 90 degree turn and runs along the inside botton of the boat and then up to the vent. maybe this is too long and that is causing much of the odor. i noticed that this vent hose stinks. told you before that i am going to change all of the hoses. should i eleminate this long run and go back to a short lead out of the boat into the stantion post? i also just ordered a bottle of k.o and c.p. to try. let me know your suggestions. the boat is now out of the water for winter and i want to get started this weekend. thanks...jeff kaplan