The homelite chainsaw motor turns ,
Masterair classic 18x8 @ 82 to 8400, 18x10 @ 78 to 8200
Dyna thrust 20x8 @ 6900

what does that engine weigh ready to bolt to plane?

I dont have the exact weight but I think it is around 4.0 to 4.25lbs I have 4 of them. The saw is at homedepot for 115.0 model 3300D. I put a j-tec muffler and machined the flywheel, that.all the mods needed.

rev,
Thanks for the tip on the Homelite 33cc. I picked up a chainsaw, model 3314, at Home Depot this past weekend for $109. It took one afternoon to make the conversion. I took the prop hub off my Ryobi (which I could never get to run properly) and it fit right on. The Homelite 33cc started right up and ran nice and smooth with good power. I can't wait to try it in the plane I'm working on.

Jim

Tmoth4 ; Did you weigth the motor without the muffler ? I changed the muffler to a j-tec make sure you use the primer bulb and it is installed to draw fuel from the tank through the carb then into the bulb and back to the tank. If it is wrong it will not run or idle right . What plane are you planning on? I think you will be very happy with this one. Keep me posted... :surprised




Ps It pulls my gee bee great.

rev,
I didn't weigh the engine without the muffler. It's about 4# as is with the firewall mount that I made from aircraft ply. I'll be using the stock muffler with a pipe braized on to go out the bottom. I haven't opened up the muffler to see what's inside. If there's any baffles I'll remove them. I can use the stock muffler cuz there's tons of room inside the cowl. I'm using the engine in a BUSA Fokker Tripe. I ran it on the test stand with an 18-6 prop, but I'm hoping I can use a 20-6 eventually. If the plane comes in at 14# or so this engine should haul it pretty well since they fly well with a G23. I want to put in a smoke system and do some aerobatics with it.

I ran it with the prime bulb removed and the hole plugged. I closed the choke and put my finger over the carb and cranked it through a few times. It drew the fuel up the pickup tube nicely. It started after a few more flips and idles just fine. I don't know if I'll bother with the prime bulb or not.

I wish I had known about this engine before I converted my 25cc Homelite leafblower engines. There was more cutting involved and I ended up buying the bigger carbs at $40 a pop. The 33cc already comes with the bigger carb so it's even cheaper to convert plus the power bonus.

So far it seems like it's going to be a great engine. How much does your GeeBee weigh and what prop are you using? What size is the GeeBee?

Jim

Tmoth4,
The gee bee is 14.5lbs 82in wing span and a dynathrust prop 20x8 with the bulb attached and the carb reset. Without the bulb the idle is not stable when trying to land, it will stall before touchdown.

You guys seem to have found a winner here! How is throttle transition etc. Are there any issues with bearings on the crank or lack thereof?

bob-nj, The crank is supported by 2 roller bearings caped with a rubber coating,and 2 end seals, the rod is needle bearings I have been flying them for over 3 years and no problems. the throttle has great transition with the primer bulb but without the bulb its a different story . why I don't know.

I just removed a 33cc Homelite chainsaw engine and want to convert it. I have a few questions for those who have already converted these. First, what is the black (plastic?) piec that fits over the top of the rear (clutch end) bearing. It has a tube with containing a rod with longitudinal ridges (like a long gear) that meshes with threads like a worm gear surrounding the clutch shaft. What is it? Can I cut the long part off that sticks out to the side?

Also, does anyone make a muffler or velocity stack that fits? I am pretty good with my hands but have no machine tools or metal fabrication experience. (Lots of woodworking)

I heard today that chainsaw engines don't take thrust forces well because they use needle bearings. Is this a problem for this engine?

Any help would be appreciated.


Jeff

The image I added didn't take last time (most likely user error) so here goes again. If it doesn't show, try this:

http://mywebpages.comcast.net/jchuml...elite_33cc.jpg

try this url http://webpages.charter.net/rsengineconversions/
they have homelite 33cc answers

I left out, the brute 33 is this engine

jwc,

I removed all that stuff from the back of the engine and I cut off the clutch shaft, leaving about 1/2" sticking out. You probably could cut it even shorter. Here's a picture of what it looks like, including the mounting tabs I made from 3/16" G10 board.

I don't know if there's any problems with the needle bearings. "rev" has been using these engines for a few years. Maybe he can comment on them.

Jim

Thanks Jim. Picture...thousand words... etc. I understand now. Has anyone talked to CH about setting one of these up with electronic ignition? Is the shaft taper the same as other Homelites?

BTW, I picked the NEW chainsaw up on ebay for $85. THe seller happened to be local so I bypassed shipping. Bonus - it came with a decent case and a chain (both fit my Stihl), a bottle of 2-cycle oil and a quart of bar oil. Oh. and a pair of grippy cloth work gloves. Probably $25 worth of stuff if I had to go out and buy it. Not a bad deal.

jwc,

You're welcome. Thank technology for digital cameras, too.

Sounds like you're getting a good engine for minimal cost. Makes us feel stupid for paying 3-4 hundred dollars for the commercially sold engines. The 45cc Homelite sounds like a great engine too, for bigger planes.

Here's a picture of how I did the throttle linkage on the 33cc. Took some time, but it works OK. I had to silver solder on a little brass extension to the throttle shaft tab to make it longer and get the hole in a better position.

Jim

Jwc , That is the automatiic oiler for the chain. Tmoth is right just remove it. Make sure when you cut the extra pice off the lower case haft leave the ridge to keep the bearing and seal in place. I have not had any problems with the bearings. ( and I put them through alot of hard use.. I wounder if the chain oiler would make a easy way to add a smoke system??