what can i use for a starter for a quadra 75? finnaly got the thing to draw fuel ,and fire up , need to tweek it , but im tired of flipping
my arm out of the socket.

Most were equipped with spring starters like the Zenoah engines use. Worked great but was heavy ... but adding a bit of weight to a Q75 really doesn't matter much. Sorry, no suggestions for a regular starter but it would be a brute!

IMO no need for a starter with a gasser. Once dialed in it will hand start rather easily.

I know the Q-65's and Q-80's came with spring starters, but I thought the Q-75 was electronic ignition and hand started with just a few flips.

YEP its electronic , but jeeze its got some compression

I have a couple that will start that 75cc.

One was bought at a swap meet in Columbus, Ohio and the other was at a garage sale. They were $100 ea

that thing is a beast, could probly start my 4.8 chevy with that.

the Quad , its gotta be early 80's , but no one seems to know, its got a 2 half crankcase, kinda looks like a chainsaw case ,weighs arround 7
pounds , cant get a pic to load

Does your engine have the compression release valve? That should solve your compression / hard cranking problems.

For those that wonder or care, I've seen far more Q 75's with a mag than electronic ignition. These engines were available for at least a decade before electronic ignitions were even common!

it had one , but its closed off with a 10-24 bolt , i know where i can get a new one , may need to get one.

is a 24 10 pitch the best prop for these? dont really have the right prop

this engine may have been upgraded to electronic , but has no mag mounts on the cylinder head , its got a pioneer
p-51 saw engine muffler and i think the head is a p-51 head.

A 24-10 should work fine on that engine. What do you have the engine mounted on?

Here's my procedure for my sachs 4.2 on a Ziroli corsair. Close choke, throttle to 1/4, turn on ignition, crank until fires. Open choke, flip prop quickly back and forth to compression (rotate prop one way to compression, then other way to compression)a dozen times, then flip to start. Usually starts on first or second flip. Good luck, red

its not got a plane yet , its going to go on the bates hawker tempest i'm building or a bridi big bee.

ive got 4 gas engines , and the only one that will fit the tempest perfectly is the US-41 , the other 3 , a Q-75 , Q100, 3W 70
all are too long for the engine bay , and making everything on the plane longer will make it look stupid.

plans on the tempest show a 27-10 prop .

The ideal engines for the "Big Bee" are in the 50-60 cc range.

A 27-10 would be way too large for a Q-75. Can you move the firewall back to accommodate the engine? Keep in mind the Q-75 is a bit heavy but that usually makes it a great candidate for a warbird. It is a bit of a thumper though so build to allow for a bit of vibration. Usually this means a very secure cowl mounting system and very strong hinges / linkages. These old Quadras are great engines but they do shake.

24x10 is the correct prop for the 75. Just use a quality prop. I hear ya about the compression, I have had a couple times when I thought my arm was going to fall off trying to get a 150 fired up. All the time I can remember that scenario there was something amiss with the engine. Things like bad ignition batteries, air leak, choke butterfly not closing completely, clogged filters and even mis adjusted throttle trim are all things I have encountered. Once you find and fix the issue or just figure out what starting procedure works for this engine it will end up hand starting easily. I'm sure you have figured out I am against starters on big engines, I have seen them slip off spinners and right into the prop twice.

because of the way the doublers on the fuse connect to the firewall , you really cant,go back, and the firewall , which is a split
firewall is only 1/4 inch , its originally designed for a ST3250.

A friend has a Big Bee with a Sach 3.2 conversion done by Ralph Cunningham

The Big Bee is all per the plans except for the landing gear.

nice bee , do you know where he got the landing gear?

I think he made the landing gear from material he bought from McMaster-Carr?


The original landing gear on a Big Bee is braced 1/4" piano wire.