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Fuel additive
#13555370
05/12/20 11:31 PM
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Joined: Dec 2007
Posts: 112
pocove
OP
Outdoorsman
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OP
Outdoorsman
Joined: Dec 2007
Posts: 112 |
I have two boats with older outboard engines, 1997 115 HP Johnson and a 2000 115 HP Mercury both run good but idle a little rough . I have been wondering about running Sea foam for a couple of tanks to help keep the engine clean. Anyone use sea foam? Does it help ?
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Re: Fuel additive
[Re: pocove]
#13555385
05/12/20 11:46 PM
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Joined: Dec 2005
Posts: 4,745
gander
TFF Team Angler
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TFF Team Angler
Joined: Dec 2005
Posts: 4,745 |
I can only give you my experience. I ran it in a 1983 150 Merc for 8 years and never had an issue with the motor. I put a little in each tank that I filled.
Last edited by gander; 05/12/20 11:48 PM.
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Re: Fuel additive
[Re: pocove]
#13555546
05/13/20 01:46 AM
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Joined: Mar 2012
Posts: 1,729
4Weight
Extreme Angler
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Extreme Angler
Joined: Mar 2012
Posts: 1,729 |
I run star tron ethanol treatment in my old Merc XR 6 seems To work great
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Re: Fuel additive
[Re: pocove]
#13555569
05/13/20 02:14 AM
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Joined: Oct 2012
Posts: 1,925
smooth move
Extreme Angler
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Extreme Angler
Joined: Oct 2012
Posts: 1,925 |
ring free from yamaha is good too. just curious, but which of those motors is the better one?
es le bon ton roulet
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Re: Fuel additive
[Re: smooth move]
#13555731
05/13/20 10:37 AM
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Joined: Dec 2007
Posts: 112
pocove
OP
Outdoorsman
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OP
Outdoorsman
Joined: Dec 2007
Posts: 112 |
Smooth move I purchased the 1997 115HP Johnson new. I had it overhauled once about 10 years ago. it starts and runs great a little smoke and rough when first starts. The 2000 115 HP Mercury I purchased a few years ago from a friend for my pontoon boat. The motor also starts right up, but it shakes and is a little noisier than the Johnson at idle and low speed. At high speed it runs well. The Johnson is smoother / quieter If I had to choose right now it would be the Johnson as the better motor.
thanks for the feed back on fuel additives.
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Re: Fuel additive
[Re: pocove]
#13555773
05/13/20 11:56 AM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
been using seafoam for over 10 yrs now, great stuff, also a preservative for storage.
decarb both engines, 2 cans seafoam in 3 gals fuel and run on muffs (DO NOT do this over concrete, the stain will not come out) till operating temp then idle for about 3-4 mins. and shut off. let it sit for a few hrs. then repeat. take it to the lake and run it for 15-30 mins. idle to wot and you're done. use a can of seafoam to 15 gals. gas and your good from then on out.
both engines will run smoother, idle a lot better and power should improve some. blows out all the carbon and frees up rings. run full synthetic or at least a synthetic blend helps a lot too.
" Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Fuel additive
[Re: pocove]
#13555782
05/13/20 12:01 PM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
I will add, I run seafoam in all my engines, gas and diesel and not a single problem from any due to fuel issues. they now have outboard/marine specific out as well, 20 oz. instead of 16 and specific for marine apps. about 10.00 a can at wal mart
" Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Fuel additive
[Re: pocove]
#13555905
05/13/20 01:34 PM
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Joined: Jan 2005
Posts: 17,232
Pat Goff
TFF Guru
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TFF Guru
Joined: Jan 2005
Posts: 17,232 |
I use seafoam and the lucas ethanol treatment on my old yamaha two stroke, keeps it happy. So I'm happy.
Pat Goff Seadrift TX
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Re: Fuel additive
[Re: pocove]
#13555907
05/13/20 01:37 PM
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Joined: Apr 2013
Posts: 652
learnin to fish
Pro Angler
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Pro Angler
Joined: Apr 2013
Posts: 652 |
If I use ethanol free fuel do I need any additives? Yamaha VMax OX66. 2002 model. Use it once a week at least.
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Re: Fuel additive
[Re: learnin to fish]
#13556068
05/13/20 03:06 PM
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Joined: Mar 2012
Posts: 1,729
4Weight
Extreme Angler
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Extreme Angler
Joined: Mar 2012
Posts: 1,729 |
If I use ethanol free fuel do I need any additives? Yamaha VMax OX66. 2002 model. Use it once a week at least. I would not think so. You can't find real gas in the metro areas like DFW.
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Re: Fuel additive
[Re: pocove]
#13556103
05/13/20 03:30 PM
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Joined: Feb 2006
Posts: 3,803
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,803 |
If you use it that often you should be fine as far as the ethanol is concerned. It has a short shelf life and causes problems like condensation if stored a long time. I do recommend the other additives however for cleaning the carbon and keeping the rings free. Yamaha Ring Free is good...
1987 Nitro MX185/Mercury Black Max 150 1999 Triton TX21/225 Mercury Optimax
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Re: Fuel additive
[Re: 4Weight]
#13556185
05/13/20 04:35 PM
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Joined: Sep 2003
Posts: 1,333
rkd
Extreme Angler
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Extreme Angler
Joined: Sep 2003
Posts: 1,333 |
I had the same motor-2002 VMax 150HP........used Ring Free every month (about a third of a bottle each time and it's not cheap) as well as only Yamalube for the oil. Again, not the cheapest options BUT that motor treated me VERY well for 18 years. Was running perfectly when I sold it this year.
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Re: Fuel additive
[Re: rkd]
#13557028
05/14/20 09:57 AM
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Joined: Dec 2007
Posts: 112
pocove
OP
Outdoorsman
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OP
Outdoorsman
Joined: Dec 2007
Posts: 112 |
Thanks for all the reply's . I'm going to start using the SeaFoam and may try a heavier dose in the mercury.
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Re: Fuel additive
[Re: 4Weight]
#13557342
05/14/20 02:05 PM
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Joined: Apr 2004
Posts: 14,149
Stump jumper
TFF Guru
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TFF Guru
Joined: Apr 2004
Posts: 14,149 |
If I use ethanol free fuel do I need any additives? Yamaha VMax OX66. 2002 model. Use it once a week at least. I would not think so. You can't find real gas in the metro areas like DFW. Murphy Mart in Rockwall has it but a lot of people don't consider Rockwall a metro area. I run it in boat and all other 2 cycle motors. Nice thing about boat is it has a 95 gallon tank and the Optimax sips gas. I usually put 40 to 50 gallons in when I do.
2200 Bay Champ/200 Mercury Optimax 2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: Fuel additive
[Re: pocove]
#13558923
05/15/20 04:14 PM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
Thanks for all the reply's . I'm going to start using the SeaFoam and may try a heavier dose in the mercury. I would suggest doing the decarb first, you will be amazed at how much better they will run when things are freed up.
" Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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