[quote="oldskier"]Yup, Sea foam is the schtuff for outboards, 'specially old inlines. I usually pull the plugs, tilt the motor and use the spray can seafoam in each plug hole and in each carb throat, let sit overnight, then run the liquid in the fuel the next day. It not only gains compression, like Chet sez, it may save your motor. I have a buddy who is a marine tech in Fla. and he believes that 90% of engine failures could be avoided by doing the treatment once a year, running a little in every tank and dumping fuel older than 3 months.[/quote]

I agree 100%. I use seafoam in everything. LoL My riding lawnmower, ATVs, snowmobiles, my suburban, and soon my boat. I have to say that why my motorcycle has like 20k miles on the motor and never once gave me one single issue.

[quote="S P E E D"]Wasnt sure where to post this thread. I think we need an "Engine Tech" section Hippie! :boating: [/quote]

I will look into that next weekend when I get some time. Things been rought the last week or so around here as im sure you can tell with my week long absence here. :eek:

Yup, Sea foam is the schtuff for outboards, 'specially old inlines. I usually pull the plugs, tilt the motor and use the spray can seafoam in each plug hole and in each carb throat, let sit overnight, then run the liquid in the fuel the next day. It not only gains compression, like Chet sez, it may save your motor. I have a buddy who is a marine tech in Fla. and he believes that 90% of engine failures could be avoided by doing the treatment once a year, running a little in every tank and dumping fuel older than 3 months.

I do it a lot at work but use engine tuner from BRP instead of sea foam. We also have a back in test tank so we can get the motor good and worm before hand and put a load on it while we run it. I also like to let them sit over night with the tunner in the motor then put a big load on it the next day and watch the smoke roll out.

It's amazing how much carbon can get built up on the rings, and if it gets behind the rings it can cause them to tighten up in the cyl and burn it down.

Wasnt sure where to post this thread. I think we need an "Engine Tech" section Hippie! :boating:

This morning I decided to do a Seafoam treatment after talking to Rick AKA "Silkeysak" about it last week. All I have to say is WOW. I did a compression test a few weeks ago and then after the seafoam treatment today I picked up 2-5 PSI per Cylinder. Figure you cant pick up that kind of power anywhere for 11 bucks!

To anyone looking to increase Compression and restore any lost power or even just looking to clean out your engine...this is the thing to do. :up:

Here's what I did:

1) Seafoam can be bought at any local automotive or major store (Napa, Part Source, Pep boys). My case here in Canada I bought it at Canadian tire for 11 bucks. Can is roughly 500 ml and apparently can treat up to 12 gallons.

2) Use a gas container and pour all 500ml of seafoam contents into gas can. Add 1 gallon of fresh fuel along with appropriate amount of 2 stroke oil.

[img]http://i1003.photobucket.com/albums/af156/E09RACING/1989%20Hydrostream%20Vision/DSCN1514.jpg[/img]

3) Disconnect fuel line going into motor and you can either use your fuel pulse ball and line and draw the seafoam fuel oil mix through your line directly from the gas can. OR I had a spare 6 Gallon Carry on gas tank with pulse ball and line in the garage I used instead of crawling under my splashwell trying to disconnect my onboard tank feed line.

[img]http://i1003.photobucket.com/albums/af156/E09RACING/1989%20Hydrostream%20Vision/DSCN1515.jpg[/img]

4) When your all set, get out the water muffs and put them on...pulse your fuel ball and fire it up for about 30 seconds, Enough to get the Seafoam gas oil mix into the cylinders then shut it off. Let it sit for 5 mins to let the seafoam do it's De-Carboning and cleaning. (At this point contact all your neighbors and tell them ahead of time there is no fire) :up:

[img]http://i1003.photobucket.com/albums/af156/E09RACING/1989%20Hydrostream%20Vision/DSCN1518.jpg[/img]

5) After 5 mins fire it up and let her run. Rick aka Silkeysak had mentioned to give it some shots of gas to loosen up any carbon build up.

[img]http://i1003.photobucket.com/albums/af156/E09RACING/1989%20Hydrostream%20Vision/DSCN1519.jpg[/img]

[img]http://i1003.photobucket.com/albums/af156/E09RACING/1989%20Hydrostream%20Vision/DSCN1522.jpg[/img]

6) Check the fuel tank to see how much is left as you go. I ran it just until there was a few drops left in the tank then killed the motor. Let it sit for a few mins....



7) After the treatment I disconnected the carry on fuel tank and re-connected my onboard tank. I pulled the spark plugs and changed them for a brand new set (The ones that came out were blackened up from the treatment) Added fresh Fuel and OMC oil and fired it up.

After everything I pulled the plugs again to do a Compression test. I picked up between 2-5 PSI per cylinder and she idles better. I think the biggest difference I noticed right away was the throttle response. Just giving it shots of gas it seems to be very responsive as compared to before.

Here's a video of the Seafoam doing it's thing. She was smoking pretty good...but smoke is good cause she was doing her job!

[youtube]http://www.youtube.com/watch?v=dGpZibfXzgw&feature=channel_video_title[/youtube]


Here's why you tell your neighbors in advance that there is not a fire and that you are just doing a Seafoam treatment.... (My Neighbor across the street actually came over and asked me what I was doing)

Can barely see my truck! :lol:

[img]http://i1003.photobucket.com/albums/af156/E09RACING/1989%20Hydrostream%20Vision/DSCN1523.jpg[/img]