rcm243

I`ve got a g-38 that used to start easily with 2 or 3 flips, since a crash that bent the crankshaft and after replacing the shaft the engine will only start if I use a heavy duty starter and it runs perfectly after it starts ,any ideas as to why this has occured? rcm

the Wasp

My Feedback: (1)

well my G38 didn't start well at all and I found it was the Sparkplug, but your's could be lean on the low-end, did you try richening the low-end ??

Jim

Charley

My Feedback: (2)

Presuming it isn't EI, maybe the gap between the coil and flywheel isn't set quite right.

CR

rcm243

I`ve tried re-setting the gap between the flywheel and the coil but it makes no difference, besides there`s not much to play on as far as this gap,I`ll try the low end adj. next. What prop would be reccomended for this motor on a plane weighing 23 pounds, its a 1/4 scale L-19. rcm

captinjohn

If your spark plug wire (high tension one) will unscrew from the coil....try replacing the wire...it could be damaged. Capt,n

thevirginian

I have to start my G-38 with a n electric starter the first time in the morning. After that a few flips with my hand and she fires up. I think it is a matter of sucking gas into the carb.

the Wasp

My Feedback: (1)

""on a plane weighing 23 pounds""

rcm243,, have you yet flown the G38 on this plane at that weight ??
I had a G38 in my 15& 1/2 pound Miss Los Angeles and I was not happy at all (but that was me), I needed more power,,
I have seen a 19 pound Steersmen fly with a G38 and it needed practically full throttle just to stay in the air, yes maybe a better pick of prop would have helped but still it needed more power,,

as for a prop on my G38 I used a 3W brand 19x8, it had a length of 18& 5/8 inches, I got 7000 RPMs tuned for flight,,
most posts I have read people use a lower quality brand 18/8, 18/10 on their G38s and get 8000 +, even up to 8800,, but for a 23 pound plane I would suggest something like a 20x4, 20x5 (if you could get one) so your Engine would pull better at half throttle "that is if you could get a good RPMs out of a prop with a 20 inch length" so you wouldn't need full throttle just to keep it in the air,,

now I know there are guys on here that will tell you diff, but that is my experience with the G38,, my advice, is, at 24 pounds sell that G38 and buy a DL 50 (sorry G38 lovers !!)..

edit,
by the way, other than being low on power by today's standards my G38 started very very easy, with just a tiny bit of a flip, and it was very easy to tune and it ran flawless !!

hope I have helped !!
Jim

rcm243

This plane is a Vailly design, and on his website there are several L-19 that are powered with the G-38 and they weigh from 22 to 30 pounds so I assumed by that a G 38 was sufficient,I guess I`ll find out tomorrow since I`m going to fly it for the first time.
A new plane is like the first date with a new woman,you don`t know what to expect. rcm

the Wasp

My Feedback: (1)

my apologies, as I have been informed the L-19 is a Cessna high wing, I thought it was some low wing plane,, the G38 should do well in this plane, but still I would use an efficient large diameter low pitch prop so you wouldn't have to use so much throttle/RPM to fly her around lazily..

http://www.warbirdalley.com/l19.htm

Jim