boovuc 1,090 #1 Posted October 20, 2014 OK. This goes back to an earlier post where the author created a mod for his leaf problems on the Onan powered tractors. (His looked better than my mod). I had some time today to but some fittings together. Using a 12" HVAC duct flange and an elbow, I drilled out the rivets and resized the flange to fit around the flywheel intake of the P series Onan. No screws or nuts in the configuration or conflagration depending on how bad you'll laugh at these pictures. I didn't want anything that could work loose to fall back into the elbow and go through the cooling air intake. This is held together by rivets and the 4 standard bolts that hold the rubberized air intake cover. It is very lightweight! The flywheel screen is still covering the flywheel fins. The original screen cover is just sitting on top of the elbow. I have another screen cover that I intend on gutting to just give me the black ring that will cover the flange. I'll ruff this thing up, spray and wipe it with acetone then paint it flat black. Now don't laugh too hard though. Without anything covering the elbow end, I mulched all the leaves in the yard, and there were a bunch of them off my Maples, Hickory and Oaks. I dare say it worked great. The only debris that got sucked in was when I was against a tree or the house/garage walls where the leafs became more airborne. Very little was on the actual flywheel screen. This didn't impede the cooling air at all entering the engine tins in my opinion. It does stick out but not much further than my 42" deck on that side. And I didn't have to reach down and clear anything off the screen. Not once! I mulched this thing for almost two hours. If anyone has a torn or broken out Onan flywheel screen cover, (the part covering the elbow opening), let me know. I'll put a wanted in the classifieds. I really don't want to cut out even my spare cover if I don't have to. I know........... but try to picture it in flat black! I would only use it in the fall. 9 Share this post Link to post Share on other sites
AMC RULES 36,945 #2 Posted October 20, 2014 Who cares as long as works... just looks like you've installed a cooling tower on your nuclear reactor. That's all. 1 Share this post Link to post Share on other sites
KyBlue 652 #3 Posted October 20, 2014 Looks good to me! Share this post Link to post Share on other sites
Shuboxlover 474 #4 Posted October 20, 2014 READY FOR LIFTOFF!!!!!!!!!!!!!!!!!! Share this post Link to post Share on other sites
diamondred 63 #5 Posted October 20, 2014 Looks Turbine powered! Share this post Link to post Share on other sites
diamondred 63 #6 Posted October 20, 2014 Looks Turbine powered! Share this post Link to post Share on other sites
motox25 36 #7 Posted October 20, 2014 Looks good! I have a 60" deck and my flywheel doesn't seem to pull that much in, is it worse on the smaller decks? Share this post Link to post Share on other sites
JERSEYHAWG / Glenn 4,487 #8 Posted October 20, 2014 The looks only a mother could love,,,,,,, lol As long as it works. Glenn Share this post Link to post Share on other sites
squonk 38,942 #9 Posted October 20, 2014 Turn that baby straight up and extend it and it will look like an old Steamer!!! Share this post Link to post Share on other sites
Pullstart 59,736 #10 Posted October 20, 2014 Turn that baby straight up and extend it and it will look like an old Steamer!!! and run a stack on the other side with the same size shroud. it'd be an angry bull then Share this post Link to post Share on other sites
Ed Kennell 35,811 #11 Posted October 20, 2014 Now you did it Boo. You got me thinking about another mod for my 520 snow thrower. I can see a tee where you have the ell. The one leg pulling the air from my heated cab and the other leg to outside air with a in cab stat controlling the air with a damper. I could probably keep the cab temp right at 72.5 degrees. Share this post Link to post Share on other sites
doc724 924 #12 Posted October 20, 2014 So here is a question for you 520 owners. I understand why all the fuss, but has anyone determined if this grass sucking problem happens more with a SD deck or a RD deck? Reason for asking is that I always (until now) had a RD deck and although all my WH were single cylinder Kohlers, I never had any issue with grass or debris getting caught on the impeller screen (of course the transmission tunnel was always full of grass clipping and leaves). Now I have a SD deck on my 314 and the left front wheel picks up grass clippings and throws them up to where the engine sucks them in. I am thinking that maybe a temporary "fender" over the left wheel might mitigate this problem. Share this post Link to post Share on other sites
scWHhauler 96 #13 Posted October 20, 2014 Looks Hot Share this post Link to post Share on other sites
Tankman 3,515 #14 Posted October 20, 2014 Turn that baby straight up and extend it and it will look like an old Steamer!!! Straight up sick doves down for chow call! I vac and clean after every outing. Share this post Link to post Share on other sites
km3h 543 #15 Posted October 21, 2014 (edited) I can't help myself, I'm laughing. But if it works, it works and that's a good thing. Edited October 21, 2014 by km3h Share this post Link to post Share on other sites
Geno 1,928 #16 Posted October 21, 2014 I like it, it's adjustable too! Share this post Link to post Share on other sites
Molon_Labe 731 #17 Posted October 21, 2014 Art Arfons would be proud. I like it. 1 Share this post Link to post Share on other sites
boovuc 1,090 #18 Posted October 21, 2014 I went out to the garage tonight and looked at it and started laughing myself! Oh well. It works! Doc.....to answer your question, the Kohlers don't have this issue. I don't think they pull half the air that the Onans require for cooling and thus, they don't clog their flywheel screen like the Onans. I have both a rear and side discharge 42" deck and both have been hooked up to my Onans. There is no difference. Grass and especially leafs do blow out from the bottom of the mower deck and the front left wheel kicks up debris as well and it gets sucked against the screen. I quite literally need to brush leafs off the screen of my 520 and my 416-8 every two to three minutes when I am mulching my leaf debris. Big pain as you steer and lean forward to push the clumps off the screen and it does choke off the cooling for the engine. This is for leaf duty only! For grass cutting, I just wait for it to cool down then hit it with compressed air through the tins. 2 Share this post Link to post Share on other sites
Save Old Iron 1,563 #19 Posted October 21, 2014 (edited) Art Arfons would be proud. I like it. Rolls-Royce may get you for patent infringements http://www.turbokart.com/about_pegasus.htm Thats 520-H The H is for Harrier. Edited October 21, 2014 by Save Old Iron 2 Share this post Link to post Share on other sites
Snowmobileaddict 403 #20 Posted October 21, 2014 Hit it with some black spray paint and it may look factory! Share this post Link to post Share on other sites
Save Old Iron 1,563 #21 Posted October 21, 2014 or the safety yellow version http://mechapixel.com/forums/showthread.php?t=7592 1 Share this post Link to post Share on other sites
Theroundhousernr 589 #22 Posted October 22, 2014 Reminds me of something from Willy Wonka or Dr. Seuss. Easily removed or added for fall clean up so who cares what it looks like. It does the job but I believe the bigger issue is the fine particulate from every day use and grease making a nice paste forming all over everything. One question though. When you hit 88 mph, What happens? Share this post Link to post Share on other sites
km3h 543 #23 Posted October 22, 2014 At 88 MPH, he goes into a time warp and "Back to the Future." 2 Share this post Link to post Share on other sites
Geno 1,928 #24 Posted October 22, 2014 OK, now I want one. 2 Share this post Link to post Share on other sites
km3h 543 #25 Posted October 22, 2014 Hey, we could start a new fad. Imagine the comments at the show next year if a bunch of us showed up with rigs like that. 1 Share this post Link to post Share on other sites