New to the forum and a new boat w/ ?'s
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New to the forum and a new boat w/ ?'s

  1. #1

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    Default New to the forum and a new boat w/ ?'s

    Nice to meet everyone!!! My name is James and I live in socal. Just picked up a 74 southwind with a 455 and jacuzzi. I have a couple questions. the guy I bought it from is a buddy of mine that has dumped alot of money into the motor but continues to get water in the oil. He has brought it to a couple of mech. who told him they couldn't figure out why there was water in the oil. What should I start with. Tom (very helpfull) said I should look at the gasket for the intake. Any other reasons why??? I don't have the boat in my garage yet so I'm just preparing myself. Also, I just bought a house in a lake community that allows skiing. I figured this boat would get my wife and I through this summer until we saved a bit more. The boat has Bass. OTT headers. The marine patrol says it's got to be 84 decibels with a drive by. If I put inserts in am I going to be close??? If the gasket is ok what would a used/running 455 cost??

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  3. #2

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    I'm not too familiar with southwinds besides the tunnel drag. Are these hulls any good? My intention is to make this thing run for a summer or two then tear it down adn build a two seater. i have a 700hp 468 that has been sitting in my garage since I got out of boating a couple years back. I've had many boats in the past but have always wanted to build a two seater that ran in the 80's. Would this hull be capable of such a build if I put full stringers through it?

  4. #3
    Senior Member Brendellajet's Avatar
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    Welcome to the boards.

    Southwinds are good boats. In the 80's is where most of them start having problems from what I have seen, but every boat is different. Some have hit the high side of 85 and not had any troubles. Full stringers are always a nice feature to have, but Im sure some have gone 80 without them.

    As for the water leak, the manifold is where this often happens. Get yourself some 3M weatherstrip adhesive and a fresh set of paper/fiber intake gaskets(no turkey tray!). When you take it apart, you may or may not see evidence of the leak. If you dont, you may want to consider a set of head gaskets too. A thin bead of the 3M around the water ports, let it dry for a couple days and that could fix the leak, but you will want to give some close attention to the plumbing system as well to make sure you aren't over pressurizing the block. Oh yeah, change the oil too.

    With the bassetts you might be a little loud. If you are in So Cal you can run your boat at Lake Elsinore with little fear as long as you have some mufflers in the headers.

    Good luck!
    "He is a lover, not a fighter. But he's also a fighter, so dont get any ideas."

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  6. #4

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    It's for canyon lake..With such a history of water being in the oil would you think that the crank is frozen from sitting long. He said he drained the oil but.....?????

  7. #5
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    Pull the spark plugs, squirt some WD 40 down the holes, and put a socket on the crank. She if she turns over easily or not. If the fuel is old, drain it and get fresh gas. Also change the fuel filters, as well as the oil and oil filter.



    Darrell.
    San Diego.

    28ft Sportcat
    With Twins

  8. #6
    Senior Member Brendellajet's Avatar
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    Kinda figured when it was in so cal and also a lake community.

    Atleast elsinore isn't too far. 84db is probably just off idle for that thing.
    "He is a lover, not a fighter. But he's also a fighter, so dont get any ideas."

  9. #7
    Senior Member jetboatperformance's Avatar
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    James Welcome to the boards ! Truth be know the majority of the boats we know and love wouldn't meet The Current SAE j2005 "Dock test" The fact that your local lake authorities allow you a "drive by" similar to (j34) instead will be of an advantage to you as discussed yesterday. Lots of things will and can influence that test eg wind etc , Your best hope IMO is to try a set of silencer inserts and hopefully with water you'll get by that initial inspection . A few years back with the advent of the New laws in Cali Josh and I spent an enormous amount of time on this (along with a calibrated digital DB meter) My SBC in my Flatty would make 86 db at 1000 rpms with two sets of mufflers one internal one external Most boats I've tested "Dry" at idle are around mid 90 DB

    heres some info from CP, I will dig for my copy of the actual test procedure when time permits Tom


    SAE J34: The most precise measurement available, taken of a boat at a distance of 50 ft. with wide-open throttle (the near maximum noise of the boat). Although great for engineering standards, it is difficult for enforcement purposes in the field. The Coast Guard recommends 86 decibels (dBA), which most states have adopted as law.

    SAE J2005: This measures the engine sound at idle with the microphone 1.5 m away. SAE recommends a limit of 90dbA for this method, which does not account for the speed or power of the boat.

    SAE J1970: In realizing the enforcement difficulties of the previous methods, SAE designed this shoreline noise test enabling regulations keeping the boat under 75 dBA at 50 ft. by operation, not mechanics. The operator is responsible for controlling the noise of the boat.

    Sound energy dissipates with distance, other sound and wind. A comprehensive study on sound with motorboats (but not including PWC) found that sound dissipates up to 9.9dBA when the boat travels from 50 ft to 200 ft away (4.8 dBA reduction from 50 to 100 ft, additional 5.1 dBA reduction from 100 to 200 ft.).

    Both the National Association of State Boating Law Administrators (NASBLA) and the National Marine Manufacturers Association (NMMA) have Model Noise Acts, which our manufacturers follow as NMMA members. These requirements are in compliance with the SAE recommended dBA standards. NASBLA requires 88 dBA under SAE J2005, and 75 dBA under SAE J1970. NMMA recommends 90 dBA under SAE J2005. The Environmental Protection Agency has determined that 75 dBA at 50 feet is an acceptable noise level to protect public health and welfare.

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