Ys 140 Dz
05-29-2003, 07:11 PM
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Ys 140 Dz
Just got my first YS 140DZ and have a few questions. I am running Powermaster 30% Low Viscosity, OS F glow and a 18x8 Zinger.
At a wide open throttle it sounds like pre-ignition. Does not matter how much I open the high speed needle. I have tried adjusting the pump. The pump from the factory was about 1 turn in from flush. I get plenty of exhaust smoke. I am using medium fuel tubing and there does not seem to be any restrictions. I am using a YS check valve on the vent line to prevent leaking.
The throttle has to be at a mid setting to start. It will not start at idle. The idle is OK when running though I have not really tried to adjust it.
I am using a Dave Brown motor mount. The glow plug has loosened and it's hard to keep the Perf Spec muffler tight. Does this mount allow the motor to move too much?
With a 18x8 I am getting 8400 rpm's. The engine is brand new so I expect it will even get better. Is the 9000 rpm the upper limit(will bad things happen it I pass it :-( ). I see others using a 18x6w APC's and this should get pass the 9000 mark. I am looking for good thrust at low speed's.
BTW I posted this on the YS forum and did not get any response. Hope some one here can help it would be most appreciated. TIA
At a wide open throttle it sounds like pre-ignition. Does not matter how much I open the high speed needle. I have tried adjusting the pump. The pump from the factory was about 1 turn in from flush. I get plenty of exhaust smoke. I am using medium fuel tubing and there does not seem to be any restrictions. I am using a YS check valve on the vent line to prevent leaking.
The throttle has to be at a mid setting to start. It will not start at idle. The idle is OK when running though I have not really tried to adjust it.
I am using a Dave Brown motor mount. The glow plug has loosened and it's hard to keep the Perf Spec muffler tight. Does this mount allow the motor to move too much?
With a 18x8 I am getting 8400 rpm's. The engine is brand new so I expect it will even get better. Is the 9000 rpm the upper limit(will bad things happen it I pass it :-( ). I see others using a 18x6w APC's and this should get pass the 9000 mark. I am looking for good thrust at low speed's.
BTW I posted this on the YS forum and did not get any response. Hope some one here can help it would be most appreciated. TIA
05-29-2003, 08:24 PM
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Nitro
Richening it up won't compensate for too much nitro. If it is knocking your plug loose, your about to destroy your engine. That engine has balls to the wall power without all that nitro. The vent line should be open to the atmosphere. No restriction.
