Merry Christmas & Happy New Year

2 stroke question

All things outboard related here!
4 Stroke, 2 Stroke & Electric
chris moody Great Britain
Supporting Member
Posts: 1785
Joined: 24 Mar 2015, 12:19
Boat Make: Ribcraft 4.8 Takacat 3.4
Outboard: Honda BF50 Tohatsu 9.8 2s
MMSI Number: 235900806
Location: Braunston
Has thanked: 64 times
Been thanked: 224 times
Contact:

2 stroke question

Post by chris moody » 01 May 2018, 09:47

I have a 2 stroke engine with about 10 - 15 hours on it. For the first 10 hours it was run on a 25:1 oil mix as per the running in guide in the operating manual. The engine has since not been used for around 12 months (other than occasionally starting on muffs with a 25:1 oil mix).

Should I repeat the running in procedure (on 25:1 oil mix) due to the lack of use for 12 months, or will I be ok running it on a 50:1 mix?
Chris Moody
Tigga 2: Ribcraft 4.8 Honda BF50
Taka Tigga: Takacat 3.4 Tohatsu 9.8

User avatar
Paul B
Supporting Member
Posts: 2047
Joined: 30 Dec 2014, 18:21
Boat Make: Honwave T38ie2
Outboard: Suzuki df9.9 (15hpconversion)
Location: Oban
Has thanked: 172 times
Been thanked: 270 times

Re: 2 stroke question

Post by Paul B » 01 May 2018, 09:51

I don’t see why you would need to re run it in. You’ve done the bedding in before , so it should be fine to run it at the 50:1 mix, just take it easy for a little while
Chief Cook and Bottle washer
TRALEE BAY FISH N CHIPS


Honwave T38ie2 Suzuki DF 9.9 (15hp) conversion
Scooter perception kayak
Gosea fishing kayak

chris moody Great Britain
Supporting Member
Posts: 1785
Joined: 24 Mar 2015, 12:19
Boat Make: Ribcraft 4.8 Takacat 3.4
Outboard: Honda BF50 Tohatsu 9.8 2s
MMSI Number: 235900806
Location: Braunston
Has thanked: 64 times
Been thanked: 224 times
Contact:

Re: 2 stroke question

Post by chris moody » 01 May 2018, 09:58

I was concerned that any lubrication within the engine internals may have dried out over the period of being layed up.
Paul B wrote:I don’t see why you would need to re run it in. You’ve done the bedding in before , so it should be fine to run it at the 50:1 mix, just take it easy for a little while
Chris Moody
Tigga 2: Ribcraft 4.8 Honda BF50
Taka Tigga: Takacat 3.4 Tohatsu 9.8

User avatar
Martin England
Supporting Member
Posts: 4303
Joined: 30 Dec 2014, 13:05
Boat Make: F-Rib 3.75 - Special
Outboard: Suzuki Smoker DT9 (1978) , Suzuki DF20 efi
MMSI Number: 123456789
Location: Huddersfield - West Yorkshire
Has thanked: 894 times
Been thanked: 424 times
Contact:

Re: 2 stroke question

Post by Martin » 01 May 2018, 10:57

I have an old 1978 smoker Chris, I only use it once a flood.
Whilst laid up I add a little 2stroke oil straight down the plug hole and then generally just pull the motor over a few times every month (killcord detached)
Obviously this only helps to protect the rings from sticking and hopefully protects the cylinders somewhat, it’s certainly not as productive as running the outboard where the oil in the fuel gets to big/little ends whilst under compression in the crankcase.
If you want to be belts and braces I see no harm in running with a rich oil mixture for your first run out of the season, I still run mine with a high oil ratio even now.
Just remember it gunks up very quickly in the carb if you don’t drain it down or burn it off.
F-RibsAndSibs.Com.... :whistle
Because it's a big old WWworld out there :mrgreen:

User avatar
sparerib Scotland
Supporting Member
Posts: 260
Joined: 08 Jun 2016, 22:27
Boat Make: Mercury Ocean Runner 340
Outboard: Yamaha 30hp 4 stroke
Yamaha 2.5hp 4 stroke
Location: Fife
Has thanked: 36 times
Been thanked: 53 times

Re: 2 stroke question

Post by sparerib » 01 May 2018, 14:41

Martin wrote:I have an old 1978 smoker Chris, I only use it once a flood.
Whilst laid up I add a little 2stroke oil straight down the plug hole and then generally just pull the motor over a few times every month (killcord detached)
Obviously this only helps to protect the rings from sticking and hopefully protects the cylinders somewhat, it’s certainly not as productive as running the outboard where the oil in the fuel gets to big/little ends whilst under compression in the crankcase.
If you want to be belts and braces I see no harm in running with a rich oil mixture for your first run out of the season, I still run mine with a high oil ratio even now.
Just remember it gunks up very quickly in the carb if you don’t drain it down or burn it off.

what he said :lol: :thumbsup

chris moody Great Britain
Supporting Member
Posts: 1785
Joined: 24 Mar 2015, 12:19
Boat Make: Ribcraft 4.8 Takacat 3.4
Outboard: Honda BF50 Tohatsu 9.8 2s
MMSI Number: 235900806
Location: Braunston
Has thanked: 64 times
Been thanked: 224 times
Contact:

Re: 2 stroke question

Post by chris moody » 01 May 2018, 16:52

So if I put the first tank of fuel through it at 25:1, and then switch to 50:1 after that I will not be doing something stupid and messing up an only just run in engine? As I've had it from new I want to take the best care of it I can.
Chris Moody
Tigga 2: Ribcraft 4.8 Honda BF50
Taka Tigga: Takacat 3.4 Tohatsu 9.8

User avatar
Paul B
Supporting Member
Posts: 2047
Joined: 30 Dec 2014, 18:21
Boat Make: Honwave T38ie2
Outboard: Suzuki df9.9 (15hpconversion)
Location: Oban
Has thanked: 172 times
Been thanked: 270 times

Re: 2 stroke question

Post by Paul B » 01 May 2018, 18:37

chris moody wrote:So if I put the first tank of fuel through it at 25:1, and then switch to 50:1 after that I will not be doing something stupid and messing up an only just run in engine? As I've had it from new I want to take the best care of it I can.
It won’t do it any harm, just will smoke a bit more, :lol:
Chief Cook and Bottle washer
TRALEE BAY FISH N CHIPS


Honwave T38ie2 Suzuki DF 9.9 (15hp) conversion
Scooter perception kayak
Gosea fishing kayak

chris moody Great Britain
Supporting Member
Posts: 1785
Joined: 24 Mar 2015, 12:19
Boat Make: Ribcraft 4.8 Takacat 3.4
Outboard: Honda BF50 Tohatsu 9.8 2s
MMSI Number: 235900806
Location: Braunston
Has thanked: 64 times
Been thanked: 224 times
Contact:

Re: 2 stroke question

Post by chris moody » 01 May 2018, 20:12

I'll try not to pollute your clean Scottish air too much with 2 stroke smoke
Paul B wrote:
chris moody wrote:So if I put the first tank of fuel through it at 25:1, and then switch to 50:1 after that I will not be doing something stupid and messing up an only just run in engine? As I've had it from new I want to take the best care of it I can.
It won’t do it any harm, just will smoke a bit more, :lol:
Chris Moody
Tigga 2: Ribcraft 4.8 Honda BF50
Taka Tigga: Takacat 3.4 Tohatsu 9.8

User avatar
Martin England
Supporting Member
Posts: 4303
Joined: 30 Dec 2014, 13:05
Boat Make: F-Rib 3.75 - Special
Outboard: Suzuki Smoker DT9 (1978) , Suzuki DF20 efi
MMSI Number: 123456789
Location: Huddersfield - West Yorkshire
Has thanked: 894 times
Been thanked: 424 times
Contact:

Re: 2 stroke question

Post by Martin » 01 May 2018, 20:20

It won’t smoke anymore than it does already Chris.
It’ll be fine.
When’s the next service due ?
F-RibsAndSibs.Com.... :whistle
Because it's a big old WWworld out there :mrgreen:

User avatar
Paul B
Supporting Member
Posts: 2047
Joined: 30 Dec 2014, 18:21
Boat Make: Honwave T38ie2
Outboard: Suzuki df9.9 (15hpconversion)
Location: Oban
Has thanked: 172 times
Been thanked: 270 times

Re: 2 stroke question

Post by Paul B » 01 May 2018, 21:22

Martin wrote:It won’t smoke anymore than it does already Chris.
It’ll be fine.
When’s the next service due ?
More oil in the mix the more a 2 stroke smokes, :Boxsmile
Chief Cook and Bottle washer
TRALEE BAY FISH N CHIPS


Honwave T38ie2 Suzuki DF 9.9 (15hp) conversion
Scooter perception kayak
Gosea fishing kayak

Post Reply

Return to “Outboards”