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Ottawa Engine ID Help Requested


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  #1  
Old 03-30-2017, 10:21:42 PM
PrattDave PrattDave is offline
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Default Ottawa Engine ID Help Requested

I am working on an unidentified hit and miss engine, have been told it may be an Ottawa. It has 4 1/8 bore, 5 in stroke. There are no tags or serial number that I can locate. If someone can help me ID this engine, I have questions about flywheel placement, cam timing, etc. before I make final assembly. Thanks, Dave Pratt
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  #2  
Old 03-31-2017, 03:30:10 PM
Doug Tallman Doug Tallman is offline
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Default Re: Ottawa Engine ID Help Requested

Looks like an Ottawa to me. What kind of questions do you have?
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Old 03-31-2017, 07:29:24 PM
PrattDave PrattDave is offline
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Default Re: Ottawa Engine ID Help Requested

Thanks for the reply Doug.

1. What is the HP rating of this engine?
2. Approx. year of mfg.
3. Is the serial no. stamped somewhere on the engine?
4. What distance should the governor side flywheel be from the cam gear for correct governor operation.
5. Are there any factory timing marks (I haven't been able to locate any) on the cam and crank gears. Is there a timing procedure to follow in the absence of timing marks.

The engine was partially dismantled when I got it so I don't know what it looked like before. The ignitor/mag are missing so I am making a spark plug conversion until the right parts can be located.

Any help on these issues will be greatly appreciated.

Dave
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Old 04-16-2017, 10:26:46 PM
PrattDave PrattDave is offline
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Default Re: Ottawa Engine ID Help Requested

Can someone advise if there is an Ottawa Engine registry? It appears that the former caretakers of this list, George and Helen Myers, are no longer with us and I am inquiring to see if someone else has taken up this task.

Hopefully all the knowledge gained by them has been passed on to someone else.

Thanks in advance,

Dave Pratt
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Old 04-17-2017, 10:28:17 AM
Doug Tallman Doug Tallman is offline
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Default Re: Ottawa Engine ID Help Requested

Quote:
Originally Posted by PrattDave View Post
Thanks for the reply Doug.

1. What is the HP rating of this engine?
2. Approx. year of mfg.
3. Is the serial no. stamped somewhere on the engine?
4. What distance should the governor side flywheel be from the cam gear for correct governor operation.
5. Are there any factory timing marks (I haven't been able to locate any) on the cam and crank gears. Is there a timing procedure to follow in the absence of timing marks.

The engine was partially dismantled when I got it so I don't know what it looked like before. The ignitor/mag are missing so I am making a spark plug conversion until the right parts can be located.

Any help on these issues will be greatly appreciated.

Dave
Sorry, Dave. Must have missed this. the engine looks a lot like my 2 1/2 HP. I'd guess mid to late teens on the age. I don't know that I've ever seen a spec on the distance for the flywheel. With everything at rest, you'd want about 1/16 inch between the gov arm and the latch block. I never worry about timing marks. Set the exhaust valve so it closes just past TDC first. Check that it opens before BDC on the exhaust stroke. May need to tweak the gear timing or the valve adj to accomplish that. Then set the ignition timing so it happens a little before TDC on compression after that.
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Old 04-17-2017, 10:54:13 PM
Dan Baalman Dan Baalman is offline
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Default Re: Ottawa Engine ID Help Requested

2 1/2 horse. Would use303K62 Webster mag bracket with a K magneto. !920 approx on date. Has the flywheel been moved? Governor sleeve on crankshaft usually has about 1/4 inch of travel. Serial number is usually stamped on end of the crankshaft. No list to date Ottawa engines.
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Old 04-18-2017, 11:24:45 PM
PrattDave PrattDave is offline
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Default Re: Ottawa Engine ID Help Requested

Doug and Dan: Thanks for the information. This will help a lot in getting things back together. Yes, the flywheel has been moved (removed). I will look at the crankshaft end again to check for a serial no. I believe that I have the cam gear timing set per your advice, hopefully close enough to get it to run. The engine has good compression, I'm just working out a timing device to operate a buzz coil for ignition. Only thing left is to check the mixer and see if it is all there.

I'll post new results.

Thanks again,

Dave
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