Model #21758511 CRAFTSMAN Boat Motor Gas

  • Engine
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  • Power Head
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  • Carburetor
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  • Magneto
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  • Column Assembly
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  • Gear Box Assembly
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  • Rewind Starter
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Question and Answers

Q:

Sears outboard motor

A:

Knowing specific information on your newly purchased item is very important to know. For the specific information that you are asking it is important to know the model number of the unit. Add the number upon this thread so that way the expert can answer your question specifically. Also here on this site you can view the manual up above you will be able to see a tab indicating Manuals. Enter the model number in the space provided and the Owner's Manual should come up.

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celene -
April 18, 2011
A:

Thank you for your question.

I can understand wanting to no the fuel to oil 2 cycle ratio for this old engine.

With out a model number I am guessing that the 3.5 hp motor may be a 217.585230 or something close to that.

It should be 32:1 2 cycle oil to gas ratio.

These engines may not run very well on the alcohol based fuels we have now. Fuel lines and fuel pump diaphragms will suffer unless you use some conditioner like Sta-bil for alcohol based fuels.

If you could please reply with the model number from the transom mount on the engine I will be glad to give you a more precise answer.

Without the model number I will not be able to search for a manual for you. However the motor being that old will make it difficult to find one.

Thank you for using Manage My Life.

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Sam A -
Sears Technician
April 19, 2011
A:

Iam looking for the same thing...here is my model number... Model #21758511 - Craftsman Sears outboard motor

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David -
April 12, 2012
A:

Thank you for your request for an outboard manual David. I am sorry but I was not able to find a manual for this old Sears outboard motor. I did find the part number: 96836, but was not able to find the manual. All I can tell you is that this motor is very small and produces only 1.2 hp., and was made in 1975. I am sorry that I was not able to help you with your request. Sam A.

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Sam A -
Sears Technician
April 12, 2012
A:

Thanks Sam, Thought it was worh a shot.

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David -
April 14, 2012
A:

I just aquired a 3.5 sears outboard i think from the early 60s Model #2175856 and need any info I cant get

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John -
September 08, 2013
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Q:

This is a 1969 sears outboard motor 3.6hp air cooled,model #217.58511. what is the gas &oil ratio? Is their oil in the motor or shaft? can I down load a manual

A:

Being able to maintain the boat motor is very important. I did some research on your model number but was not able to find the gas and oil ratio. I also looked for the manual but was not able to locate it. Your expert will be able to help answer your question. It may take 24-48 hours. I do hope everything works out.

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Marc -
October 01, 2012
A:

Thank you for your question on the outboard motor fuel mix ratio.

I am sorry I cannot find a manual for you.

This outboard motor is water cooled so when you start the engine please make sure that there is water coming out of the exhaust port. On a lot of these old engines the rubber water pump fins will break off with age and over heat the engine and ruin it.

The will require a 24:1 mixture of outboard oil to gas ratio.

I hope this will help.

Sam A.

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Sam A -
Sears Technician
October 03, 2012
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Q:

fuel for outboard motor

A:

Having to put the proper fuel in an important factor in the performance of your engine. You will receive a detailed reply from an expert within 24-48 hours

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Priscilla V -
April 12, 2012
A:

Thank you for your question.

I have looked up the model number you have submitted. The engine requires a fuel mix of 16:1. I recommend using regular 2cycle oil because this is an air-cooled engine.

I hope this is helpful Please let me know if you need further assistance.

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
April 14, 2012
A:

This is VERY helpful. Thanks!

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David -
April 14, 2012
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