Poor Starting - Scottoiler issue? - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 4 (permalink) Old 11-04-2012, 10:34 AM Thread Starter
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Poor Starting - Scottoiler issue?

The guy that's selling me his bike told me that it sometimes turned over a few times before starting. Having read through a number of posts on this forum I decided to open the fuel cap and try it, in order to see if it might be a vacuum problem.

Well, the engine burst into life instantly (much to his surprise) and I suggested that it might need new fuel/vacuum pipes. He mentioned that he had T'eed in his Scottoiler to the pipe to the fuel tap, and not directly onto the carb, and I wondered if this could cause a lack of vacuum pressure, possibly due to a poor fit at the T.

I forgot to ask at the time, but why do some people tee in the Scottoiler connector and not just take it direct from one of the carbs?
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post #2 of 4 (permalink) Old 11-05-2012, 12:06 AM
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Scottoilers sure do cause a lot of trouble for devices that are supposed to save labor. I would not run one, personally. Between having lost a chain due to a defective Loobman (and the bad habits I picked up with it) and the sensitivity of the vacuum systems on these bikes, I feel like it's just begging for trouble.

All that said, not having enough vacuum to run the oiler and the petcock may be indicative of further vacuum problems. May not be, but it's something to keep an eye on long term.

Cheers,
-Kit
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post #3 of 4 (permalink) Old 11-13-2012, 10:08 PM
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If the bike sets for any length of time, fuel will evap out of the float bowls requiring the engine to turn over a few times for vacuum to open the fuel tap and fill the bowls. Use prime to fill the bowls before starting and you won,t have that problem. Also, get rid of the "T" and run the oiler off another carb by itself.
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Erv

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post #4 of 4 (permalink) Old 11-14-2012, 01:44 AM Thread Starter
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Quote:
Originally Posted by ervdrvr1 View Post
If the bike sets for any length of time, fuel will evap out of the float bowls requiring the engine to turn over a few times for vacuum to open the fuel tap and fill the bowls. Use prime to fill the bowls before starting and you won,t have that problem. Also, get rid of the "T" and run the oiler off another carb by itself.
Happy trails,
Erv
Seems that might have been the issue - bike had not been used much just recently. Since I've had it, the problem has failed to show.
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