K161 Valve Guide

[WHX?? 48,815]

3 hours ago, rmaynard said:

 

So, I don't know what if anything I accomplished by installing the ACR cam other than proving that it's easy

The ACR cam is a God send Bob.

Of all my tractors two don't have it. A 1045 and a 1055. If I told you to take one for a tool you wouldn't be able to start either without knowing the tricks. They lock right up on compression and no matter how tight that SG belt is the SG stalls out. This is when we see smoke coming out of an orginal type 70 Amp ig switch. A sure sign to lay off on it.

One has to lay off the switch and the motor rolls backwards a tad. Then you hit the key again and they pop off. Of course this all changes if the motor is cold or hot and you are intimate with the carb settings. 

[953 nut 55,211]

11 hours ago, WHX?? said:

The ACR cam is a God send Bob.

Of all my tractors two don't have it. A 1045 and a 1055.

None of my older engines (953 and 1055) have the ACR cam but the spark advance cam works well if the timing is right on the money. If it is too far advanced (gap to large) it kicks back. If it is retarded (gap too tight) starting is easy but no power.             

[WHX?? 48,815]

Point taken Richard ... more than likely why the 1045 kicks back.

 

So if you had a SG motor ready for assembly on the bench and both style cams available which one would go in? 

[Handy Don 12,217]

3 minutes ago, WHX?? said:

Point taken Richard ... more than likely why the 1045 kicks back.

 

So if you had a SG motor ready for assembly on the bench and both style cams available which one would go in? 

Great question!

[WHX?? 48,815]

5 minutes ago, Handy Don said:

Great question!

I thought so Don.

When I was building the 1055 motor I had both and went with the advance cam. Mainly because that's what was in it. Hindsight being 20/20 I shoulda put in the ACR one. 

It may have meant dealing with tappet & valve length issues like Bob had but worth it? 

[squonk 41,096]

Compression release every time. The 2 piece Spark Advance cam is a pain to install

[richmondred01 2,237]

5 minutes ago, squonk said:

Compression release every time. The 2 piece Spark Advance cam is a pain to install

Yes they are a pain. You need two hands and 12 fingers.

I’ve got two hands but only 7 fingers that work. 

[WHX?? 48,815]

Interesting the 1054 I just picked up from @Shynon has a weird starting quirk.

It rolls over very easy so obviously a ACR cam. Starts to run at very low rpm like it's still rolling on the SG but the start button is released. After about 10 seconds you can hear/feel the ACR flip and off she goes. 

[rmaynard 15,446]

And my fat fingers always seem to get in the way of each other.

[rmaynard 15,446]

2 minutes ago, WHX?? said:

Interesting the 1054 I just picked up from @Shynon has a weird starting quirk.

It rolls over very easy so obviously a ACR cam. Starts to run at very low rpm like it's still rolling on the SG but the start button is released. After about 10 seconds you can hear/feel the ACR flip and off she goes. 

I think maybe the idle is set too low? ACR doesn't kick out until 600 RPM.

Edited April 6, 2023 by rmaynard

[squonk 41,096]

59 minutes ago, WHX?? said:

Interesting the 1054 I just picked up from @Shynon has a weird starting quirk.

It rolls over very easy so obviously a ACR cam. Starts to run at very low rpm like it's still rolling on the SG but the start button is released. After about 10 seconds you can hear/feel the ACR flip and off she goes. 

Sounds like the weights that operating the ACR lever are hanging up or maybe the spring is broken