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Old 04 October 2016, 12:33   #11
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So... All parts arrived and fitted.

Started engine and runs nice and smooth. Then after no more than 1 minute it'll stall as if fuel is cut off.

No miss fire, just revs drop and gone.

All carb bowls have equal fuel in them after stalling.

Will restart without priming, but using choke after 1-2 pulls.


Any ideas?
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Old 04 October 2016, 12:34   #12
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New pump fitted as per tohatsu diagrams.
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Old 04 October 2016, 12:58   #13
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Intermittent fault on the kill switch?
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Old 04 October 2016, 13:02   #14
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Quote:
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Intermittent fault on the kill switch?

Don't think so, revs drop a lot quicker with that
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Old 04 October 2016, 13:12   #15
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Two stroke engine ? If so air getting in crankcase ( through inspection plate or similar)
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Old 04 October 2016, 13:19   #16
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Air getting in on fuel line?
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Old 04 October 2016, 13:29   #17
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Two stroke engine ?

Yeah it's a tohatsu m50d2

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Old 04 October 2016, 13:37   #18
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There was someone doing a mariner up who found a plate leaking on the crankcase drawing air,seems odd it's not burning all the fuel in the bowls on yours giving a least 5 mins running time.could it be float chamber valves sticking causing a vaccume so will only run until it carnt pull anymore fuel ?
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Old 04 October 2016, 14:13   #19
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I am not 100% sure but think also the 50 has a safety feature cutting the RPM if overheating , possible also on some other issues. So if You have a faulty sensor, this might be the issue?
Symptoms not fully supporting this but might be a long shot?
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Old 04 October 2016, 23:03   #20
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Soz to go over the symptoms again!!!

The engine starts easily?
Does it idle cleanly when on the muffs?
If you do nothing how long will it idle for?
Does the idle revs die suddenly or over a period of say 10 secs , 30 secs to what?
By pumping the bulb will it continue to idle? That is very significant?
Will it restart normally or must you use the choke?
Do you need to pump the bulb to get it to start?

My thoughts are about raising the fuel tank to atleast the height of the carbs and as a tempory measure i'd replace the fuel tubing by clear transparent stuff just to watch the fuel flow.
I don't know the engine how many carbs and how many cylinders? Pull or electric?
regards Nic
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