Engine design affects starting

[Egon]

If there are glow plugs the engine has a pre combustion chamber.

 

[Tx Jim]

Don't know what sort of chambers my little 32 Hp Shibaura (Ford 1920) has, but it starts easily without glow plugs, down to 32F, and I never have tried below that.

Ford 1920 parts catalog shows key 36 as """glow plugs""".

 

[Agvg]

Why does Japanese small engines use out dated designs with prechambers and not direct injection? Is it the obsession to make it so light and cheap as possible?

 

[fried1765]

Ford 1920 parts catalog shows key 36 as """glow plugs""".

Oh.....I know my Ford 1920 has glow plugs,....the point is, that it starts just fine without them.

 

[Tx Jim]

Sorry my reading comprehension failed me again. Danged Oldtimers acting up again.:laughing:

 

[beenthere]

Why does Japanese small engines use out dated designs with prechambers and not direct injection? Is it the obsession to make it so light and cheap as possible?

Agvg
Which small engines do you refer to here?

 

[Sawyer Rob]

If there are glow plugs the engine has a pre combustion chamber.

You mean, "if there are glow plugs in the engine"...

Some direct injection diesels have a glow plug in the intake tract...

SR

 

[Sawyer Rob]

Why does Japanese small engines use out dated designs with prechambers and not direct injection? Is it the obsession to make it so light and cheap as possible?

No, many "use to be" direct injection, the pre chambers came along with emission BS.

SR

 

[ptsg]

My 1962 Toselli 226 crawler tractor with a 2 cylinder Air cooled VM engine always started so nice and easy. Granted the lowest temp we usually get here is somewhere around 28F, but without any glow plugs or grid heaters (it didn't have any of that), it only took like 1/2 of a turn to start up.

These air cooled engines as long as it has good compression and good battery, it'll always start regardless of the temps outside.

My new tractor with the Kukje A series engine, Cummins licensed, start just as nicely and easy with the use of glow plugs.

The Kubota engine on my homemade backhoe, takes a loooot of glow plug help to start. Usually more than 40 seconds.

 

[Agvg]

Yes, large air-cooled diesels are popular I very cold climat, Tatra trucks uses V12 air-cooled for use in extreme cold. Some Russian equipment has all kinds of tricks to get it to start in the cold.