Does anyone have a new homelite 25 ring that they can part with? I'm just looking here to see before I call Frank Bowman.
Pm me with a shipped price if you have one. Thanks, Dave

The Frank Bowman ring will be much better than a stock replacement. For the Homelite 25cc, you can also send him the piston and he will install a pin, and supply a ring configured for use with a pinned piston. Then you can grind out the bridge in the exhaust port for a further power increase. It is worth the trouble....

AV8TOR

Thanks for the advice. I've dealt with Frank before. I've also pinned pistons before. Just checking if anyone else does the same thing I do, order stuff and end up not using it.

Av8tor1977, is there that much power to gain for the effort? I'm in the process of building
a Dynaflite super cub 104" and plan on floats and tires with a homelite 25. Do you think I should
get the Bowman ring and cut the exaust before I even mount it? I'm not looking to go nuts
with this thing (it is a cub) but I am wondering if it'll get off the water. It will have flaps.
Thanks, Craig

As far as I am concerned, it is a very worthwhile modification. Frank's rings generally give a decent power increase by themselves. In the case of the Homelite, I believe removing the exhaust port bridge is very beneficial. I can't give you any before and after exact numbers, but the Homelites I have done this way run extremely strong.

AV8TOR

Bowman’s Rings

Frank Bowman

1211 N Allen Ave. Farmington, N.M. 87401-3568

505-327-0696 Email: [email protected]

Reproduction Model Engine Rings

Quality at a fair honest price. Making a good ring is a Skill. Making a fine ring is an Art!

Last Revised 1-6-09

I will reproduce nearly any model engine ring. If not available, I’ll need a good piston and cylinder to measure, or send motor. Send return postage, insurance is extra. For orders outside of USA, ask for shipping costs? Priority postage is extra. An order of 10 rings or more, discount of $1.00 off per ring, mixed orders are fine! Ring cost & shipping charges for USA listed below.

Standard ring up to .65 engines: $9.00 ea.(1) shipped $13.00, (2) shipped $22.00

Standard ring from .66 & up: $10.00 ea.(1) shipped $14.00,(2) shipped $24.00

Dykes ring up to .65 engine: $10.00 ea.(1) shipped $14.00,(2) shipped $24.00

Dykes ring from .66 & up: $11.00 ea.(1) shipped $15.00,(2) shipped $26.00

** I also make special rings to order, ask for prices.**

Ace Twin .64

Aircom M61 (pin)

Anderson Spitfire .65

Air-O .45

Asp .52 4C, .61, .80 4/C, .91 4/C

Atomic 60

Atwood .49, .51, .63

Avistar .60 (pin)

Bantam .16

Bat .19

Berilli 36 CC (Pin)

BME 3.5 (Pin)

Brison 2.4 (pin), 3.2 (pin)

Brown Jr. .60 cylinder sizes vary (send Piston & cylinder for proper fit & correct ring)

Brownie .29

Bushwacker 37.7 CC (pin) Sears

Bunch .45, .49

Cameron .15, .19

Cave Cobra

Cleveland Tom Thumb .45

Como .29 (pin), .40, .51 (pin), .90 (pin)

Contestor D.60

CRRC Pro 45 CC (pin)

Cub Cadet 25CC (pin)

DL 50 CC (pin)

DME 100 Twin (pin)

Dooling .29, .61, Yellow Jacket

DZY 48 CC Twin (Pin)

Echo 16CC (pin), 21CC (pin), 21.2 CC (pin), 23.6 (pin), 24.4 CC (pin), 30 CC (pin), CS-3000 (pin), 50 CC (pin)

Edco Sky Devil .64 Old or New (RJL) state which one?

Enya 3.5 (pin), .30 SS (pin), .35 X (pin), .40 X Dykes (pin), .40 Dykes model 6002, .45, .45SS (pin), .46 4C,.49 X (pin), 50SS (pin), .53 4/C, .60 4C, .60 X (pin), .60 standard, .80 X (pin), .80 4C, .90 4C, 120 R 4C, 1.55 4C, 240 4C Twin

ETA .29

Forster .29, .31, .88, .99

Fox 36 Sand Cast (pin), .40 Sch., .45, .50, .59 .047 thick ring only, .59 long shaft Ign., .60 Blue Head, .60 Eagle, Fox Hawk

Red Head .60 (pin), .74, .78, 120 Twin (pin)

GMS .61 (pin), .76 Dykes (pin)

Hassad Blue Streak .64

HB .21 Dykes, .40 PDP Dykes, .50 Dykes, .61 (pin), .61 Dykes

Hiller (Car)

Hirobo 36 (pin)

Homelite 25 CC, 30 CC (pin) old .060 thick , 30 CC newer .030 thick, 33 CC (pin), 38 CC (pin), 40.6 CC Super EZ Chain Saw, 45 CC (pin), 50 CC (pin)

Horner 3.7 Twin (pin)

Hornet .19, .60

Howler .60 (pin)

HP .21 4/C Dykes ,.40 (pin) ,.61 R.I. Silver Star (pin), .61 Dykes (pin) Blk Case Gold Hd.

Irvine .40 Pylon Dykes & Standard, .61 Dykes, .25 Dykes.

Kavan MK 50

KDC Kioritz 21.2 CC (pin), 23.6, 25 CC (pin), 30 CC (pin), 58 CC (pin)

K&B .35 Dykes, .40 Dykes, .40 S Dykes (pin), .61, .61 Dykes (Lee Custom), 1.35 (pin), 1.5 (pin)

Kometa 29

Kraft .61 (pin)

Kratmo 10 CC, 4A Ignition

Laser 61 4/C

Lewis 60

Magnum .53 XL 4C, .61 XL (pin), .91 XL 4C

Maloney 100 (pin), 125 (pin)

McCoy .09, .19, .19 Dykes B.H., .21 Dykes Car, .29 all versions, .29 Dykes B.H., .35 Dykes B.H., .36, .40 Dykes B.H., .49, .55, .60

McCulloch 21 CC (pin), 25 CC (pin) MDB 90 Leaf Blower, 28 CC, 32 CC (pin),

MDL 28 CC (pin)

MDS .78 (pin), 1.48 (pin), 2.18 (pin)

Merco .40, .49, .49 Dykes, .50, .61, .61 Dykes

Moki M .51 (pin), .61 (pin), 1.20 (pin), 1.35 (pin), 1.50 (pin), 1.80 (pin), 2.10 (pin)

O&R Industrial Motor 1 HP

OPS Maxi .30 (pin)

OS .20 FS 4C, .26 4C, .28 FH Dykes (pin), .32 (pin), .37 H (pin), .40 H Dykes & Standard, .40 H (P) Pylon, .40 FS 4C, .40 SR (pin), .807 bore, .40 FSR .835 Bore, .40SR Dykes, .45 (pin), .45 Dykes (pin),

.45 RSR Dykes, .46 Dykes (pin), .46FX (pin), .46SF (pin), .48 Surpass, Max .50 old, .50 FSR Dykes (pin) ,.50 H (pin), .50 SX & SXH (pin), Surpass .52 4C, .58, Max-H .60 FGR .60 4C, .60FSR (pin) .9445 Bore - older or SF .9055 Bore, .61 FS 4C, .61 SX & SXH (pin), .65 (pin), .70 & .75 Surpass, .80 H,.80 Dykes (pin), .90 & .91 4C, .90 & .91 Glow, .91 FX (pin), .91 SX H (pin), 1.08 (pin), 120 4C, 160 FX (pin), BGX-1 3500 (pin)

Poulan 42 CC (pin), 42 CC Wildthing (pin), 46 CC (pin), 54 CC (pin), 60 CC (pin)

Profi .40 (pin), .61 (pin), .76 (pin)

Quadra 35 CC , 40 CC (pin), 42 CC (pin), 50 CC (pin), 150 Twin (pin)

RSC 1.40 (pin)

Ross .60 Dykes (pin), .60 opposed twin Dykes (pin), .61 (pin)

Rossi Speed .60 old, .60 (pin) .021, .61 (pin) .023, .65 (pin) .0235

Ryobi 26 mm Bore EJ 100 (pin), 31CC (pin) older .064 thick, 31 CC (pin) newer .047 thick

Saito .40 4C, FA .45 4C, FA .50 4C, FA .60 T 4C Twin, FA .65 4C, 72 4/C, FA .80, .91 4C, 120 4C,130 TD 4C Twin, 150 4C, 300 4C Twin

Sachs 2.0 (pin)

Scott Thunderbird

Shindiawa 33 CC (pin)

Skil chainsaw (pin)

Sky Chief .53

Spe 25.4 (pin), 40CC (pin), 45CC (pin)

Stihl 25.4 (pin), 028 Chain Saw 44 CC (pin), Super 45 (pin), 57 CC (pin), MS 440 Chainsaw 70 CC (pin)

Super Tigre .19, X.25, S .29 (pin), G21.29 old, .34 (pin), .40 Bullring, S.40 (pin), G21.40 std., G21 .40 Dykes, G21.46 std. ,S.45 (pin), V.45, X.45 (Pin), G21 .46 wide Dykes, .46 Bullring, G.46, G .46 Bullring, V 51, G51 (pin) Italian, G51 (pin) China, V.56, V.56 Dykes, V 60 light case .044 or .047 top to bottom measurement, G24 60 Old, G 60 Bluehead, X60 (pin), V.60 wide & narrow Dykes, S.61 (pin), G.71, S.75 (pin), .90 (pin), 2000 (pin), 2300 (pin), 2500 (pin), 3000 (pin) Italian, 3000 (pin) China, 3250 (pin), 4500 (pin)

Syncro B-30, Syncro ACE, Syncro ACE Special

Tartan 1.34 (pin), Twin .77 (pin)

Technipower 7 Cylinder radial

3MM 53 TOC (pin)

3W 80 CC Boxer Twin (pin)

Thunder Tiger .39 (pin), Pro .50 H (pin), .54 4C, .91 FS 4C, 120 Pro (pin)

Ueda .45, .61

US 25 CC (pin)

Vlvatam 5 CC

Veco .50 Dykes, .61, .61 Dykes

Vega 10CC

Webra 10 ccm, 6.5 (pin), .40, .40 (pin), .40 Dykes (pin), .50 Dykes (pin), .61, .61 (pin),

Speed .61 FS (pin), Speed .61 F Dykes (pin), T480 4C, .91 (pin), .120 Dykes (pin), T 4.90

Weedeater (pin) 1.380 Bore, 22 CC (pin)

Weedwacker (pin)

Westbury Atom III

YS .61 Long Stroke (pin), .63 4/C, .80 H (pin) 2C, F.91 AC 4C, .91 2C (pin), F120 4C

YW 24CC single & 48CC Twin (pin)

Zenoah G20 (Pin), G23 (pin), G26 (pin), G38 (pin), G45 (pin), G62 (pin)

I don't mean to take over this thread but.....I will get the ring from Frank and cut the exaust port but now I'm wondering
if the 25cc Homelite is enough. I also have a 33cc Homelite chainsaw converted and ready to go. Since I do plane to fly
off water, would the 33 be better. 104" span 1571 wing area, weight 15-17 lbs. What do you think ? Thanks , Craig

33 would be better especially with floats.Lots of drag.Had a 25cc on my sons Bals USA DVIII,80 inch.No floats.Flew ok at 14.25 lbs.Flew much better with a homy 30cc.Both of my engines where weedie motors.I would go with the 33 saw motor.

That's what I was starting to think, I'm not sure what the weight diff. is but I have read that the saws put out more,
so it might be the better of the two.....Craig

I just weighed the 2 engines and I was shocked. the 25cc weedeater with muffler prop hub and mount 4lbs. 2oz
the 33cc chainsaw with prop hub, muffler and mount 4lbs. even, I will go with the 33 !!