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Author Topic: Use drill to start hit and miss emachine engine  (Read 957 times)

IndianaRog

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Re: Use drill to start hit and miss emachine engine
« Reply #15 on: September 04, 2019, 07:48:44 pm »
Quote from: njrich50 on September 04, 2019, 07:28:51 pm
Quote from: IndianaRog on September 04, 2019, 06:14:04 pm
There are a number of ebay and Amazon vendors in China selling pulleys that would work well if the 3-6 week leadtime doesn't bother you.  At under $6.00 USD each, I have just ordered two...one for the M90 and a spare for the M91.  Only critical measurement is the 8 mm bore.

Rog

Can you give me a link for the pulleys?

Here are the ones I just ordered thru Amazon:

https://www.amazon.com/gp/product/B07T6ZMMVY/ref=ppx_yo_dt_b_asin_image_o00_s00?ie=UTF8&psc=1

Roger
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Nick

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Re: Use drill to start hit and miss emachine engine
« Reply #16 on: September 04, 2019, 07:53:40 pm »
Love how well it works Rog!  8)

You really wouldn't need to cut the notch in the side of the pulley, it's just a nice extra touch. Once you had a complete wrap around the pulley, the string would hold it in place enough for a quick pull-start.
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Nick

IndianaRog

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Re: Use drill to start hit and miss emachine engine
« Reply #17 on: September 04, 2019, 08:06:18 pm »
Quote from: Raphael on September 04, 2019, 11:51:08 am
Bonjour Roger,
Well done, as I have no tool, I have to find a rriend who will make one for me, I agree with you, this engine is not obvious to start with the hand only.

Raphael, the only tool I used was an electric drill.  I put an 8 mm diameter drill bit into the pulley, tightened the two set screws on the pulley AND added a couple of drops of CA glue where drill bit passed thru the pulley.  Then I put the drill bit into the drill, locked the running electric drill in a vice and used a couple of hand files to make the cut you see in the pulley...first a coarse file and then a finer one to remove most of the machining marks.  I finished with some fine sandpaper and voila...a rope start pulley after about 20 minutes of grinding.

Roger
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SlowArrow

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Re: Use drill to start hit and miss emachine engine
« Reply #18 on: September 05, 2019, 12:25:41 am »
Quote from: Nick on September 04, 2019, 07:53:40 pm
Love how well it works Rog!  8)

You really wouldn't need to cut the notch in the side of the pulley, it's just a nice extra touch. Once you had a complete wrap around the pulley, the string would hold it in place enough for a quick pull-start.

In my experience, simple wraps of the string will not start the engine. Maybe if you roughed up the inside of the pulley, but without catching the slot, the string slips
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Mike

Raphael

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Re: Use drill to start hit and miss emachine engine
« Reply #19 on: September 05, 2019, 02:28:04 am »
Bonjour Roger,
Presented well, it seems really simple, thank you for the detail, I have only to find the pulley  ;)
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IndianaRog

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Re: Use drill to start hit and miss emachine engine
« Reply #20 on: September 05, 2019, 09:37:05 am »
Quote from: Raphael on September 05, 2019, 02:28:04 am
Bonjour Roger,
Presented well, it seems really simple, thank you for the detail, I have only to find the pulley  ;)

Raphael, I ordered two from Amazon...here is the link:

https://www.amazon.com/gp/product/B07T6ZMMVY/ref=ppx_yo_dt_b_asin_image_o00_s00?ie=UTF8&psc=1

One will be for my M90 and the other a spare...perhaps Jin will have another Hit and Miss in the future!!

Roger
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Raphael

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Re: Use drill to start hit and miss emachine engine
« Reply #21 on: September 05, 2019, 01:28:04 pm »
Bonjour Roger,
Many thanks again, this link will also be useful for lot of members.
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Raphaël, Membre du Modèle Yacht Club de Paris : http://mycparis.fr/
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njrich50

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Re: Use drill to start hit and miss emachine engine
« Reply #22 on: September 06, 2019, 07:35:57 am »
Quote from: IndianaRog on September 05, 2019, 09:37:05 am
Quote from: Raphael on September 05, 2019, 02:28:04 am
Bonjour Roger,
Presented well, it seems really simple, thank you for the detail, I have only to find the pulley  ;)

Raphael, I ordered two from Amazon...here is the link:

https://www.amazon.com/gp/product/B07T6ZMMVY/ref=ppx_yo_dt_b_asin_image_o00_s00?ie=UTF8&psc=1

One will be for my M90 and the other a spare...perhaps Jin will have another Hit and Miss in the future!!

Roger

Thank you very much Roger.............
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tsweller

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Re: Use drill to start hit and miss emachine engine
« Reply #23 on: October 12, 2019, 03:44:12 pm »
Quote from: Raphael on September 05, 2019, 01:28:04 pm
Bonjour Roger,
Many thanks again, this link will also be useful for lot of members.

Hi all,

I got my vertical ET1 some weeks ago and i did some experiments on it. After replacing  the piston rings and re inserting the crankshaft it started only withe a rope.
My mistake was, i didn't pay attention for the timing of the exhaust valve. The valve should start opening close before the bottom dead center. The ingnition should be short before the TDC.

After all i need only one turn by hand to start reliable. Depends on your needle valve. 1/4 Turn open. Eventually you can choke the Carburator with your finger.

Excuse my poor english.

Greetings from a hit&miss guy

Thomas



 
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