Hi,
(Geez, another boating-related topic! I gotta stop...)

My 1989 Johnson 15hp smokes a lot. It uses so little fuel that I've
forgotten when I fueled up, but I always put in 50:1. Is there other
reasons apart from too much oil in the gas which would make a 2-stroke
smoke? Is there a way to find out what the ratio IS (I might have
mis-calculated)? I want to sell the engine, and it's a Hard Sell when you
can't see the engine for smoke (Koff! Koff!)

It runs fine apart from the smoke.

Lloyd Sumpter
"The Tin Boat" Mirrocraft 12

Lloyd,

Those were great motors and extremely popular. It is probably the mix ratio
if it smokes a lot even after it is warmed up but it could be adjusted a
little rich too.

I think it might be worth the investment to get some fresh gasoline and some
OMC/Johnson/Evinrude 2 cycle oil and mix it accurately to 50:1.

A friend here in Sacramento, CA, has a nice open 15' aluminum skiff on a
trailer with a 'not worn out' 15hp Chrysler 2 stroke. He just bought a new
Honda 20hp 4 stroke tiller and just had it out last week for the first time.
He said it was very quiet and smooth with no smoke. He said it makes him
want to go fishing now. He said his old motor must have been around 10hp by
now so it really feels much stronger now.

--
Bill Kiene

Kiene's Fly Shop
Sacramento, CA, USA

Web site: www.kiene.com


"Lloyd Sumpter" wrote in message
news
Hi,
(Geez, another boating-related topic! I gotta stop...)

My 1989 Johnson 15hp smokes a lot. It uses so little fuel that I've
forgotten when I fueled up, but I always put in 50:1. Is there other
reasons apart from too much oil in the gas which would make a 2-stroke
smoke? Is there a way to find out what the ratio IS (I might have
mis-calculated)? I want to sell the engine, and it's a Hard Sell when you
can't see the engine for smoke (Koff! Koff!)

It runs fine apart from the smoke.

Lloyd Sumpter
"The Tin Boat" Mirrocraft 12

Those were great motors and extremely popular. It is probably the mix
ratio
if it smokes a lot even after it is warmed up but it could be adjusted a
little rich too.

I think it might be worth the investment to get some fresh gasoline and
some
OMC/Johnson/Evinrude 2 cycle oil and mix it accurately to 50:1.


--
Bill Kiene



Lloyd,
I would do what Bill suggested first with the fresh gas and correct oil
mixture. If it still smoke real bad you might want to look at the
Carburetors. They may be loading up causing the rich gas/oil to dump in the
cylinders. Remember Gas burn better then Oil

Bill

On Mon, 29 Mar 2004 20:15:21 +0000, Bill wrote:

Those were great motors and extremely popular. It is probably the mix
ratio
if it smokes a lot even after it is warmed up but it could be adjusted a
little rich too.

I think it might be worth the investment to get some fresh gasoline and
some
OMC/Johnson/Evinrude 2 cycle oil and mix it accurately to 50:1.


--
Bill Kiene



Lloyd,
I would do what Bill suggested first with the fresh gas and correct oil mixture.
If it still smoke real bad you might want to look at the Carburetors. They may
be loading up causing the rich gas/oil to dump in the cylinders. Remember Gas
burn better then Oil

Bill

Sounds like I should "explore" a too-rich mixture. There's a knob on the front -
does that change mixture at all rpms or just idle (or what DOES it do?)

I want to get some fresh gas, but I'm not sure what to do with the old stuff.
My lawn mower would explode - it's electric!

Lloyd

"Lloyd Sumpter" wrote in message
...
On Mon, 29 Mar 2004 20:15:21 +0000, Bill wrote:

Those were great motors and extremely popular. It is probably the mix
ratio
if it smokes a lot even after it is warmed up but it could be adjusted
a
little rich too.

I think it might be worth the investment to get some fresh gasoline and
some
OMC/Johnson/Evinrude 2 cycle oil and mix it accurately to 50:1.


--
Bill Kiene



Lloyd,
I would do what Bill suggested first with the fresh gas and correct oil
mixture.
If it still smoke real bad you might want to look at the Carburetors.
They may
be loading up causing the rich gas/oil to dump in the cylinders.
Remember Gas
burn better then Oil

Bill

Sounds like I should "explore" a too-rich mixture. There's a knob on the
front -
does that change mixture at all rpms or just idle (or what DOES it do?)

I want to get some fresh gas, but I'm not sure what to do with the old
stuff.
My lawn mower would explode - it's electric!

Lloyd


Put it in a 5 gallon can and try the new fuel. You can always add a gallon
to your van every fillup.

"Calif Bill" wrote in message link.net...
"Lloyd Sumpter" wrote in message
...
On Mon, 29 Mar 2004 20:15:21 +0000, Bill wrote:

Those were great motors and extremely popular. It is probably the mix
ratio
if it smokes a lot even after it is warmed up but it could be adjusted
a
little rich too.

I think it might be worth the investment to get some fresh gasoline and
some
OMC/Johnson/Evinrude 2 cycle oil and mix it accurately to 50:1.


--
Bill Kiene



Lloyd,
I would do what Bill suggested first with the fresh gas and correct oil
mixture.
If it still smoke real bad you might want to look at the Carburetors.
They may
be loading up causing the rich gas/oil to dump in the cylinders.
Remember Gas
burn better then Oil

Bill

Sounds like I should "explore" a too-rich mixture. There's a knob on the
front -
does that change mixture at all rpms or just idle (or what DOES it do?)

I want to get some fresh gas, but I'm not sure what to do with the old
stuff.
My lawn mower would explode - it's electric!

Lloyd


Put it in a 5 gallon can and try the new fuel. You can always add a gallon
to your van every fillup.

That should do wonders for the fuel injectors.

Lloyd Sumpter wrote:

On Mon, 29 Mar 2004 20:15:21 +0000, Bill wrote:


Those were great motors and extremely popular. It is probably the mix

ratio

if it smokes a lot even after it is warmed up but it could be adjusted a
little rich too.

I think it might be worth the investment to get some fresh gasoline and

some

OMC/Johnson/Evinrude 2 cycle oil and mix it accurately to 50:1.


--
Bill Kiene



Lloyd,
I would do what Bill suggested first with the fresh gas and correct oil mixture.
If it still smoke real bad you might want to look at the Carburetors. They may
be loading up causing the rich gas/oil to dump in the cylinders. Remember Gas
burn better then Oil

Bill


Sounds like I should "explore" a too-rich mixture. There's a knob on the front -
does that change mixture at all rpms or just idle (or what DOES it do?)

I want to get some fresh gas, but I'm not sure what to do with the old stuff.
My lawn mower would explode - it's electric!

Lloyd


The knob on the front is a mixture needle for low speed only, the high
speed jets are fixed orifices on that engine.

Dump the old gas into any convenient car or truck. Sure, into a nearly
full tank of fresh gas would be best, but neither you nor the vehicle
will ever notice the difference, and no, your van won't smoke like a
2-stroke.

Rob

On Mon, 29 Mar 2004 08:49:45 -0800, "Lloyd Sumpter"
wrote:

Hi,
(Geez, another boating-related topic! I gotta stop...)

My 1989 Johnson 15hp smokes a lot. It uses so little fuel that I've
forgotten when I fueled up, but I always put in 50:1. Is there other
reasons apart from too much oil in the gas which would make a 2-stroke
smoke? Is there a way to find out what the ratio IS (I might have
mis-calculated)? I want to sell the engine, and it's a Hard Sell when you
can't see the engine for smoke (Koff! Koff!)

It runs fine apart from the smoke.

It the fuel is older, that could be a problem, but the oil may have
settled in the tank - needs to be mixed again - or the rings may need
to reseat themselves (run it for a while) - or the rings may be bad -
or the fuel mixture as you mentioned, but I believe that 50:1 is about
right for that vintage.

Later,

Tom

On Mon, 29 Mar 2004 17:18:39 +0000, Short Wave Sportfishing wrote:

On Mon, 29 Mar 2004 08:49:45 -0800, "Lloyd Sumpter" wrote:

Hi,
(Geez, another boating-related topic! I gotta stop...)

My 1989 Johnson 15hp smokes a lot. It uses so little fuel that I've
forgotten when I fueled up, but I always put in 50:1. Is there other reasons
apart from too much oil in the gas which would make a 2-stroke smoke? Is there
a way to find out what the ratio IS (I might have mis-calculated)? I want to
sell the engine, and it's a Hard Sell when you can't see the engine for smoke
(Koff! Koff!)

It runs fine apart from the smoke.

It the fuel is older, that could be a problem, but the oil may have settled in
the tank - needs to be mixed again - or the rings may need to reseat themselves
(run it for a while) - or the rings may be bad - or the fuel mixture as you
mentioned, but I believe that 50:1 is about right for that vintage.


Hmmmm...why would bad rings make a 2-stroke smoke? It does seem to smoke less
after I've run it for awhile.

Lloyd

On Mon, 29 Mar 2004 18:38:45 -0800, "Lloyd Sumpter"
wrote:

On Mon, 29 Mar 2004 17:18:39 +0000, Short Wave Sportfishing wrote:

On Mon, 29 Mar 2004 08:49:45 -0800, "Lloyd Sumpter" wrote:

Hi,
(Geez, another boating-related topic! I gotta stop...)

My 1989 Johnson 15hp smokes a lot. It uses so little fuel that I've
forgotten when I fueled up, but I always put in 50:1. Is there other reasons
apart from too much oil in the gas which would make a 2-stroke smoke? Is there
a way to find out what the ratio IS (I might have mis-calculated)? I want to
sell the engine, and it's a Hard Sell when you can't see the engine for smoke
(Koff! Koff!)

It runs fine apart from the smoke.

It the fuel is older, that could be a problem, but the oil may have settled in
the tank - needs to be mixed again - or the rings may need to reseat themselves
(run it for a while) - or the rings may be bad - or the fuel mixture as you
mentioned, but I believe that 50:1 is about right for that vintage.

Hmmmm...why would bad rings make a 2-stroke smoke? It does seem to smoke less
after I've run it for awhile.

To be honest with you, I don't know. I had an '83 70 hp Johnson that
didn't smoke too much, but it was annoying. I also had low
compression one cylinder. Took the thing apart, honed the cylinders,
new rings, back together and no smoke.

I assume it has to do with incomplete combustion, but that's a guess.

Just being honest about it.

Later,

Tom