model number: Kav 87

I have a old sunbeam in parts an i have a stripped down motor fromit with new parts for the engine in there packets from about 1982 or something lol., but i have some numbers an just wondering what the motor would look like an is it a good engine. The info i have is
Model number : Kav 87
Spec number: D6924
Serial number: 92869782
An its a kirby tecumseh
Any info would be great :-)

Re: model number: Kav 87 nathan_867 #44198 19/02/13 08:03 AM
Joined: Jul 2010 Posts: 210 Likes: 5 Adelaide FAST GRASS Apprentice level 3
Hi nathan_867 the KAV87 is a 140?cc two stroke motor. There was a few different versions, I have one off a Sunbeam it was painted green and was the round barrel finned version. The motor's were not "loved" in the mower industry as I'm sure others will attest to. They had a few issues of there own; like the crank case covers coming loose and the bolts holding the muffler on coming loose, yet the exhaust cover to get to them being near impossible to get out! Not to mention starting etc. However they are a powerful motor on a mower. Also once the big end Main bearings wear the crankshaft can be bent and they vibrate. The big end bearing on the conrod are needle rollers (there is 28 of them) and the crankshafts/conrods can tend to get "ripples" in them or the case hardening can flake off as well. If the crank is bent due to worn mains it can be successfully straightend and be serviceable. I have done a few....... The ones I have come across have usually had little wear and some have had real bad carbon deposits choking up the exhaust ports. Having said all that if you have the parts, (change the crankshaft seals too!) it would make a good collector motor mower. I don't think there are many left. If you have forgotten which way the head goes on I can help you out. Specs: KAV 87 Bore 2.500" Stroke 1.770" 2.8 HP @ 2400 RPM 3.4 HP @ 2800 3.9 HP @ 3200 4.2 HP & 3600 6.3ft/lbs @ 3600 RPM Pic's would be good mate! Watch out for the Gaskets they ARE ASBESTOS! (The replacements are as well) so keep them damp with WD or oil wrap them up in plastic and discard if you must.... Scrape them off if you need to. DO-NOT power buff them off! Last edited by FAST GRASS; 19/02/13 08:03 AM. "Quality is remembered long after the price is forgotten"
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Re: model number: Kav 87 nathan_867 #44199 19/02/13 11:58 AM
Joined: Jul 2012 Posts: 523 Likes: 1 wonthaggi vic nathan_867 Qualified Senior
In the next day or two ill try grt it all out n take some pics there is a fair bit of stuff there lol. Do u have a picture of what the engine should look like? Cause i dont know if i have the engine cover lol
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Re: model number: Kav 87 nathan_867 #44200 20/02/13 03:04 AM
Joined: Jul 2010 Posts: 210 Likes: 5 Adelaide FAST GRASS Apprentice level 3
See pics mate! EDIT: and a pic of a K11 (a square finned version of a KAV87)on a Craftsman I scored off vccomm! the pride of my Kirby powered collection oh for a catcher!! Last edited by FAST GRASS; 20/02/13 03:27 AM. "Quality is remembered long after the price is forgotten"
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