Stigian 1,234 #1 Posted June 9, 2011 Morning Guy's I'm watching a Kohler Magnum on ebay, the problem is it in in bits!! Have a look at the link below and let know your feelings on it guys. Are parts like gaskets easy to get hold of? I'm having thoughts about a belt driven turbo engine for my 6 wheeled project so maybe this ebay engine is an ideal candidate for a rebuild to turbo spec EBAY ENGINE LINK THINGY Share this post Link to post Share on other sites
Kelly 1,030 #2 Posted June 9, 2011 I'd say it is worth the price right now, but does it even turn over? it looks pretty rusty, I know here parts are not to bad to find, price is much better than Onan parts, and I have a 18hp magnum, it is a great engine even with 1000 hours on it. Share this post Link to post Share on other sites
Stigian 1,234 #3 Posted June 14, 2011 Thanks for that Kelly The engine turns over so I'm going to have a bid on it. Just over 2 hours to go, wish me luck Guy's :hide: Share this post Link to post Share on other sites
coldone 35 #4 Posted June 14, 2011 $41 ending bid. Thats a steal. Wish i would have seen it. I have one on my MF1855. Share this post Link to post Share on other sites
Anglo Traction 761 #6 Posted June 15, 2011 Good deal Ian ! . Best price I can find for a Mag 18 Gasket Set is UK Share this post Link to post Share on other sites
Stigian 1,234 #7 Posted June 15, 2011 Thanks for having a look for a gasket set Richard :hide: Share this post Link to post Share on other sites
chris11 184 #8 Posted June 15, 2011 Would you like me to get you that gasket set and mail it to you? Share this post Link to post Share on other sites
Stigian 1,234 #9 Posted June 16, 2011 Thanks for the offer Chris, I will send you a pm once I've had a good look at the engine just in case it's a bit too far gone to rebuild. I had a look at the ebay photo's again today and noticed one broken off head bolt sticking out of the barrel.. At least there is still part of the bolt to grip on to, so it should come out easy. Share this post Link to post Share on other sites
chris11 184 #10 Posted June 17, 2011 I have that same engine lots of power, i have it on my cub puller. Let me know what you need for parts. NAPA auto parts sells all kolher engine parts here in the U.S. Share this post Link to post Share on other sites
Stigian 1,234 #11 Posted June 21, 2011 Thanks Chris, the engine hasn't turned up yet (maybe today) so no idea on what parts are needed at the mo, will let you know when I do. Good to know these engines have loads of power, just what's needed with my rather heavy project :hide: Share this post Link to post Share on other sites
Stigian 1,234 #12 Posted June 28, 2011 Good afternoon Guy's, well the engine arrived and... it's a bit of a mixed bag of good and bad.... I'm not quite sure if it's worth rebuilding or not.... Photo time And thus it arrived.. Que the normal silly photo And there we have it, a Kohler Magnum 18 in kit form At this point I should of taken lots of photos of lots of engine bits scattered about the place, instead keenness took hold as the engine block/casing got thrown onto the bench for a check over.... Pistons moved in and out which is a good thing.. Trouble is the valves didn't move Better find out why.. The front barrel came off easy.. Looks quite clean in there.. A few of the parts scattered about on the bench.. Better tidy it up before splitting the engine casing. The casing came apart easier than I was expecting, two bolts gave a few problems but a slightly under size socket sorted them out. The case was split by winding a few of the bolts back in a bit and gently tapping them with a hammer.. When the tapping sound turned into a hollow "thunk" the case pulled apart. Can you spot what's missing on this photo? Lot's of teeth off the camshaft sprocket!!! The sprocket on the crank only has the very slightest of damage to a couple of teeth. One of the bores looks very good with only the faintest of marks. The other bore..... Well your going to have to wait a little while, I need to get started on cooking dinner... Roast lamb tonight.. Yummy :D Share this post Link to post Share on other sites
Jim_M 179 #13 Posted June 28, 2011 Ian, I would say you have a good excuse to order a performance cam for it. You can get one with factory lift and increased duration to give you lots of low end torque. Jim Share this post Link to post Share on other sites
Stigian 1,234 #14 Posted June 28, 2011 The other bore is not quite so good with some deep-ish rust pitting.. I'm not sure if it will come out with a quick hone, or is a re-bore needed? The crank case is as you would expect.. Full of bits of camshaft teeth!! The con rods feel good with no up and down play on the crank, same for the piston ends. The piston are good as well It only took minimal effort to clean the carbon off them. Standard size which could be handy, plenty of space for a re-bore should the rust in the barrel need it. So there you go Guy's, do you think it's worth the parts and the time to rebuild it or should I be looking for a better engine :woohoo: Share this post Link to post Share on other sites
Jim_M 179 #15 Posted June 28, 2011 I think it's well worth rebuilding. Share this post Link to post Share on other sites
Stigian 1,234 #16 Posted June 29, 2011 I would say you have a good excuse to order a performance cam for it. You can get one with factory lift and increased duration to give you lots of low end torque. Jim I like your thinking Jim Where would I find such a cam? I think it's well worth rebuilding. I hope so... Spotted something that has got me a bit worried though.. Is this strange shape and uneven taper normal on these engines The other slightly annoying thing is the lack of an engine ID number, no sign of it anywhere!! All I can find is 3884 kinda scratched onto the case.. I was having a glance at the Magnum 20hp engine spec's today and noticed the 18 and 20hp engine have the same bore size, but the 20hp has a larger displacement. Is the extra displacement down to a crank with a longer throw or different rods, or both even? I'm just wondering how easy it would be to rebuild this engine to 20hp spec.. Are the carbs the same? Cheers Guy's :ROTF: Share this post Link to post Share on other sites
Jim_M 179 #17 Posted June 29, 2011 Ian, Check with one of these people. A lot of times they require your old cam as a core or regrind your old cam so it might not be the cheapest option for you, but you have to pay if you want to play. http://lakotaracing.com/ http://smallenginesofseymour.com/camshafts.html Greg Hackman at Seymour small engines has a very good reputation. Jim Share this post Link to post Share on other sites
Stigian 1,234 #18 Posted June 29, 2011 Thanks for that Jim Just looking at the Seymour website and a bit confused by all the choice Which cam would you go for bearing in mind I'm not looking for lot's of hp just a bit more torque. Done a bit of research and I think the engine spec number is 24524. Did I mention this engine came out of an Argocat? Share this post Link to post Share on other sites
shorts 182 #19 Posted June 30, 2011 to change displacement, if the bore is the same the crank has to have a different stroke, the question is are the rods and pistons the same? the rods could be shorter or the pin holes in the pistons could be closer to the top of the piston. I think I'd cost compare a different std.size jug to a bore job and new pistons if everything else checks out good. Share this post Link to post Share on other sites
Jim_M 179 #20 Posted June 30, 2011 Ian, I would shoot Greg Hackman an e mail, tell him what you have and what you're looking for, he'll know what cam profile you want. Jim Share this post Link to post Share on other sites
Stigian 1,234 #21 Posted July 17, 2011 Thanks for all the of parts help and advice with this engine Guy's But this engine is no longer needed for this project as another er.... more complete engine has been found.. I'm not giving you any clues though Chris - No parts needed this time but don't worry, I'm sure I will need to ask you to send me something at some point :D Share this post Link to post Share on other sites