HOT start 180 hp engine

On 28 Mar 2004 22:33:28 GMT, (Hankal) wrote:

My 1973 Skyhawk has the 360/180 hp engine carburated.
When the engine is hot it is difficult to start.
My procedure is master switch battery side on, fuel pump on. Prime throttle 3
times. Fuel pump off, turn starter while advancing the throttle.
Today she would not fire and the battery went south.

Any recommendations, suggestions.
Will check timing and Magnetos tomorrow.
Hank N1441P

You have an electrical fuel pump??

I've never seen one on a 172.

Mike Weller

"Mike Weller" wrote in message
s.com...
On 28 Mar 2004 22:33:28 GMT, (Hankal) wrote:

My 1973 Skyhawk has the 360/180 hp engine carburated.
When the engine is hot it is difficult to start.
My procedure is master switch battery side on, fuel pump on. Prime
throttle 3
times. Fuel pump off, turn starter while advancing the throttle.
Today she would not fire and the battery went south.

Any recommendations, suggestions.
Will check timing and Magnetos tomorrow.
Hank N1441P

You have an electrical fuel pump??

I've never seen one on a 172.


You find them in at least some 180 hp engine upgrades and standard equipment
in all the new fuel injected 172s. The electrical fuel pump will be a backup
for the engine fuel pump, which most 172s don't have, either. I guess
gravity feed just does not give you the fuel pressure you need to feed a 180
hp engine, but I suppose there are others around here who would know a lot
more about that.

Several companies, including Penn Yan, Air Plains, and Avcon sell conversion
kits and/or STCs for 180 hp 172 upgrades. Some of the conversions include a
constant speed prop. The cost will typically run about $30,000 for a fixed
pitch conversion.

From what I have heard, the constant speed prop adds about thirty pounds and
does not help performance much. Some of these conversions also require
limiting the flaps to 30 degrees. All of the conversions claim faster speed
and improved short field performance.

C J Campbell wrote:

All of the conversions claim faster speed and improved short field performance.

I flew one once, back about 1989. It would cruise at 125 knots with a fixed pitch
prop. As far as short field is concerned, there was one based at Kupper when I
bought my Maule. He not only had 180 hp, but he had fancy wing tips and vortex
generators. He still needed more runway than my 160 hp Maule. Of course, the only
way I'll see 125 knots is pointed straight down. :-)

George Patterson
Treason is ne'er successful, Sir; what then be the reason? Why, if treason
be successful, Sir, then none dare call it treason.

On Mon, 29 Mar 2004 18:23:05 -0800, "C J Campbell"
wrote:


"Mike Weller" wrote in message

I've never seen one on a 172.


You find them in at least some 180 hp engine upgrades and standard equipment
in all the new fuel injected 172s.

Well. of course on the fuel injected new ones but I just haven't seen
that on a regular one. I stand corrected.

Mike Weller