| T O P I C R E V I E W |
| philihun |
Posted - 30 Jun 2017 : 18:52:56
Evening all. Back from a lovely 2 weeks along the Chesterfield canal via Keadby and West Stockwith Trent locks. Lovely scenic narrow waterway, bit weedy and shallow in parts but well worth a visit. My question about the petrol -leak is this. My Honda 15 is pretty well 100% reliable so far but when i come to moor (locks etc) i slow to a stop and press the engine kill button--i always seem to leave a small film of neat petrol on the water behind the engine. It does not happen on start up or on the move. Advice please.
pr hunt |
| 5 L A T E S T R E P L I E S (Newest First) |
| df |
Posted - 03 Jul 2017 : 22:20:19
If you saw the crud that comes out of the back of my boat when manouvering you wouldn't worry about anything coming from a 4 stoke outboard, greenpeace have bigger fish to fry and most of those fish are floating on the surface behind me.
NBAS--The communal colostomy bag of the boating community.
 Visit leomagill.co.uk |
| philihun |
Posted - 03 Jul 2017 : 18:17:51
Thanks for the replies. The Honda is a key start but to stop it there is a red button alongside the ignition switch. I always switch off at locks etc as i have to give the wife a hand to open the gates etc Keeps me fit and saves fuel. The un burnt fuel answer sounds right and as it is a minimal amount of fuel in the water i will leave it at that.( until Greenpeace turn up). Thanks lad's.
pr hunt |
| IanM |
Posted - 02 Jul 2017 : 10:03:44
A good test might be to cut off the fuel (either with a tap or by pulling the hose off the tank), let it idle until it runs out and then see if you get the same symptom. Also, the oil on the water you see might be oil or grease from lower down the leg (and might be happening when you are on the move). Even the smallest amount will spread out into a sizeable area once you have stopped moving but will be hard to spot with the prop churning up the water.
As for the switching off in locks that Trevor mentioned, it seems to vary by waterway. On the canals it is usual to keep the engine running in locks. On the Great Ouse it was the opposite. I don't know if that was because The Great Ouse was dominated by GRP boats rather than narrowboats and thus packed more boats into the locks but anyone leaving their engine running would often be asked to switch it off.
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| cliveshep |
Posted - 01 Jul 2017 : 16:54:20
Whether ignition key-switch of "kill-switch" which do the same job, the engine will continue to run down a rev or two until physical motion stops. During that time and for that second or so it is sucking in fuel it cannot burn, so your twin cylinder for even one second assuming a 1000rpm tickover will run down from 16rpm/sec of which half will be exhaust strokes so you have a potential for 16 cylinders of unburnt gas per second. That of course assumes 1 second at 1000 rom which in fact is a slow to dead stop so maybe only 50% of that but if I have made the point clear you can see there is still a small amount of oily gas being ejected.
Phew - that was a bit long-winded!
Finally living the dream!
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| trevork |
Posted - 30 Jun 2017 : 23:43:23
Must admit as to know very little about outboards but I did think Hondas were key started and stopped??? The very description of a kill switch suggests emergency stop to me and stopping the engine dead like that may leave unburnt fuel in the system that then dribbles out. Also, I wonder why you don't leave it ticking over when going through locks, swing bridges etc?
Likely I'm talking twaddle and some much cleverer bods will venture by presently! |
