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#408110 - 05/23/08 10:10 PM 2 stroke or 4 stroke - how do I tell  
Joined: Jul 2006
Posts: 4
tanjacap Offline
Warrant Officer
tanjacap  Offline
Warrant Officer

Joined: Jul 2006
Posts: 4
Wyoming MI
I just bought a dinghy. It has a 2001 15 hp Johnson model j15rsib. How do I tell if it is 2 stroke or 4?

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#408204 - 05/24/08 10:01 AM Re: 2 stroke or 4 stroke - how do I tell [Re: tanjacap]  
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GoFirstClass Offline
Retired Boating Bum
GoFirstClass  Offline
Retired Boating Bum
Grand Poobah

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Pasco, WA
Get the model and serial number off the engine and call one of the outboard dealers in Detroit along the river. They'll be able to tell you.


"Beachcomber" 1995 Sea Ray 550 Sedan Bridge


Anchor's down......Bottoms Up!
#408206 - 05/24/08 10:04 AM Re: 2 stroke or 4 stroke - how do I tell [Re: GoFirstClass]  
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jtheile Offline
Admiral
jtheile  Offline
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North Ridgeville, Ohio
GFC, Wyoming is on the good side of MI, it's outside of Grand Rapids.


Joe
Four Winns 225 Sundowner
#408263 - 05/24/08 03:11 PM Re: 2 stroke or 4 stroke - how do I tell [Re: jtheile]  
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Al Offline
Nautical Alchemist
Al  Offline
Nautical Alchemist
Grand Poobah

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Vagabond Wanderer from Mich.
Look for a oil filler cap. If it exists, its likely a 4 stroke. However, many 2 stroke engines also have oil injection for their larger engines - whether or not it includes 15hp or not, I am not sure. For many of the smaller 2 stroke engines, you still have to mix oil yourself (I have to with my 2004 Mercury 5hp dinghy motor)

I am going to guess though that it is a 2 stroke, as I don't think Johnson makes any small 4 stroke engines.

But I don't know for sure, so best thing is to look up the model number on-line or consult a dealer.


President and CEO - Napmoor and Doolittle.


2004 Mercury 270 Dinghy.
2016 Grand Design Reflection 29RS 5th Wheel
2016 GMC Sierra 2500HD SLT 6.6L Diesel

previous boats:
1995 Carver 325
1999 Four Winns 268
1999 Four Winns 225
1996 Rinker 180
#408265 - 05/24/08 03:19 PM Re: 2 stroke or 4 stroke - how do I tell [Re: Al]  
Joined: Jan 2003
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Al Offline
Nautical Alchemist
Al  Offline
Nautical Alchemist
Grand Poobah

Joined: Jan 2003
Posts: 15,083
Vagabond Wanderer from Mich.
Look here:

http://www.usboatsupply.com/pdf/EJ/ModelNumberRefGuid2005.pdf

Apparently, a 4 stroke would have a 4 in the model number.


President and CEO - Napmoor and Doolittle.


2004 Mercury 270 Dinghy.
2016 Grand Design Reflection 29RS 5th Wheel
2016 GMC Sierra 2500HD SLT 6.6L Diesel

previous boats:
1995 Carver 325
1999 Four Winns 268
1999 Four Winns 225
1996 Rinker 180
#408404 - 05/25/08 04:25 PM Re: 2 stroke or 4 stroke - how do I tell [Re: Al]  
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deepv Offline
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deepv  Offline
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Admiral

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SoCal
Use your nose when its running.


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#408414 - 05/25/08 06:59 PM Re: 2 stroke or 4 stroke - how do I tell [Re: deepv]  
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seabuddy Offline
Admiral
seabuddy  Offline
Admiral

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Posts: 28,862
See if you can lift the engine without trouble.

#408428 - 05/25/08 09:15 PM Re: 2 stroke or 4 stroke - how do I tell [Re: seabuddy]  
Joined: Jan 2003
Posts: 15,083
Al Offline
Nautical Alchemist
Al  Offline
Nautical Alchemist
Grand Poobah

Joined: Jan 2003
Posts: 15,083
Vagabond Wanderer from Mich.
Also on a 2 stroke, there should be somewhere inicating to mix oil 50:1 in the gas, or some other ratio.


President and CEO - Napmoor and Doolittle.


2004 Mercury 270 Dinghy.
2016 Grand Design Reflection 29RS 5th Wheel
2016 GMC Sierra 2500HD SLT 6.6L Diesel

previous boats:
1995 Carver 325
1999 Four Winns 268
1999 Four Winns 225
1996 Rinker 180
#408443 - 05/25/08 10:42 PM Re: 2 stroke or 4 stroke - how do I tell [Re: Al]  
Joined: Jun 2006
Posts: 16
Tanja Offline
Warrant Officer
Tanja  Offline
Warrant Officer

Joined: Jun 2006
Posts: 16
Michigan
Thanks for all input, after much looking around, (tanjacap is my husband) he was able to verify it is a two stroke. Working great.


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