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Message started by Dave48 on 12/07/07 at 03:15:24

Title: HOT engine?
Post by Dave48 on 12/07/07 at 03:15:24

I'd sort of noticed that the Savage's engine gets very, well, HOT! And takes what seems like a long time to cool (at least compared with the Virago). And when after only 2 miles on a coldish day I arrived at local workshop yesterday the guy said "that smells hot for such a short trip!"

Any thoughts as as to how do I tell if it is TOO hot? And if it is, what might be the cause(s)?

Longest trip it's done to date is only c.40 miles, but I haven't noticed any fall off in power or other symptoms at that distance.

Thanks for any advice.

Title: Re: HOT engine?
Post by LANCER on 12/07/07 at 04:27:03

Other than buying a cylinder head temp gauge, which I think is a very good thing to have, just watch to be sure the oil is fresh and always up to the mark.

This is the front page of the website, it is an ultralight aircraft parts supply.
http://www.ultralightnews.ca/westach/chtgauges.html

This link is info about the CHT's (cylinder head temp gauges)
http://www.ultralightnews.ca/cht/chtstory.htm

Link of gauges and parts.
http://www.ultralightnews.ca/cht/index.htm

Here is a pic of one of the gauges and the page it is on.
http://www.ultralightnews.ca/westach/images/2C1-CHT.jpg

http://www.ultralightnews.ca/westach/chtgauges.html

Title: Re: HOT engine?
Post by azjay on 12/07/07 at 05:45:34

lancer, you have some of the coolest info! i haven't seen you post that temp gage before, excellent!

Title: Re: HOT engine?
Post by thumperclone on 12/07/07 at 06:39:38

whats the operating temp range of the head ?
oil is 140 F

Title: Re: HOT engine?
Post by Savage_Greg on 12/07/07 at 06:57:03

Sometimes the word HOT is subjective, and the guy at the "workshop" made a silly comment. What does HOT mean for an air cooled Thumper on a cold day?

If the mixture is correct and the engine runs good then just forget about it. It's okay.

Title: Re: HOT engine?
Post by LANCER on 12/07/07 at 17:57:33

thumperclone wrote:

whats the operating temp range of the head ?
oil is 140 F

I am not sure where I got this idea but for some reason it seems to me that the head temp is about 350......ok, the info page I linked to mentions 350 degrees. That is on a Rotax air cooled engine so it would seem that the temp would be in the same ball park.

Title: Re: HOT engine?
Post by LANCER on 12/07/07 at 17:59:13

azjay wrote:

lancer, you have some of the coolest info! i haven't seen you post that temp gage before, excellent!

I did mention it a few months ago when I bought one of the gauge & sensor sets for my project bike.

Title: Re: HOT engine?
Post by J Mac on 12/07/07 at 19:08:29

The pipe also gets hot (well, duh) :D

I wondered how my favorite jeans got a hole in them until I realized I had been burning them the way I was standing when filling the gas tank. I darn near burned a hole in my new ones too.

Title: Re: HOT engine?
Post by Max_Morley on 12/07/07 at 19:10:41

I think the owner manual should recommend refueling from the left side not right. Max

Title: Re: HOT engine?
Post by Savage_Greg on 12/08/07 at 07:03:46

J Mac wrote:

Yep. I learned about muffler burns a long time ago, and I still manage to get a new one every year. Just can't seem to stay away from the engine until it cools :P

That pipe gets hot, and it's fun listening to the "crackle and pop" from the contracting metal as it is cooling down too.

Title: Re: HOT engine?
Post by J Mac on 12/09/07 at 07:40:21

Yes, my daughter was wondering about that noise after I pulled in one day. I explained it was the metal cooling, etc. It's one of those "motorcycle sounds" that the uninitiated can't understand.