New motor install - it smokes

Doodah · 05-29-2016, 11:28 AM

I bought a Yamaha JR6-19001-00-00, 357cc engine assembly for my '05 G27A light duty. It was in the factory box but had no procedure/etc. paperwork with it. Before I proceed. I checked if it had oil before I removed it from the box. It did.
I changed motors and replaced the brakes. It cranked up fine. I ran it in and out of the shop, to check brake setting. Maybe 5 minutes running time or so
I smelled smoke; raised the seat and yes, it was.
Is this normal for first few minutes? Would it have break in oil in it?

Mike Mac · 05-30-2016, 07:57 AM

Are you sure it came with oil "in it"? That's unusual for it to be shipped with oil!
And where is the smoke coming from?

And it's always smart to only do one thing at a time and test your work, before going on to another issue!! Are the brakes dragging, and causing the motor to work harder?

smallblock450sl · 05-30-2016, 08:05 AM

Could it be your old engine smoked and the risidual oil in the muffler is trying to burn out?

Doodah · 05-31-2016, 09:41 AM

smallblock, thanks for your response.
Yes the old engine was smoking. It did occur to me that it might be smoking from residual oil. But I wanted someone with experience on this type motor to respond. Didn't want to go on "gut instinct".
The vendor is supposed to contact Yamaha for their explanation/response today.

smallblock450sl · 05-31-2016, 07:21 PM

Experiance

I work at Taco Bell

Or I thought I as going to. Run the engine at medium rpm's for 5 minutes. Let cool down. Repeat. Should be fine. I've NEVER had a bad crate motor from Yamaha.

smokindawg · 05-31-2016, 08:42 PM

New engines will smoke some as they warm up to running temps and will do this for a few minutes........ I've run many a rebuilt engine with new paint and they all smoked off the engine, not from the engine. It's the paint baking. At least when I rebuilt and painted one it was.

Did the smoke smell like oil or something hot?

Doodah · 06-01-2016, 08:17 AM

Smoke was coming from muffler/tail pipe. Smelled like oil.

Doodah · 06-01-2016, 01:34 PM

smallblock, Did your crate motors come in with oil?

smallblock450sl · 06-01-2016, 06:22 PM

Quote:

Originally Posted by Doodah

smallblock, Did your crate motors come in with oil?

Everyone. But we do check to make shure. Maybe the box got turned upside down and some oil got into the cylinder?

Doodah · 06-01-2016, 09:47 PM

smallblock, Thank you very much. Although there was no indication it had been handled previously, I was concerned. It seems it was either mishandled in shipment, OR the old muffler is burning off old oil residue.
Again, THANX!

05-29-2016, 11:28 AM	#1
Doodah Not Yet Wild Join Date: May 2016 Posts: 15	New motor install - it smokes I bought a Yamaha JR6-19001-00-00, 357cc engine assembly for my '05 G27A light duty. It was in the factory box but had no procedure/etc. paperwork with it. Before I proceed. I checked if it had oil before I removed it from the box. It did. I changed motors and replaced the brakes. It cranked up fine. I ran it in and out of the shop, to check brake setting. Maybe 5 minutes running time or so I smelled smoke; raised the seat and yes, it was. Is this normal for first few minutes? Would it have break in oil in it?
Doodah Not Yet Wild Join Date: May 2016 Posts: 15

05-30-2016, 07:57 AM	#2
Mike Mac G8 Specialist Join Date: Jun 2009 Location: Phoenix Posts: 7,799	Re: New motor install - it smokes Are you sure it came with oil "in it"? That's unusual for it to be shipped with oil! And where is the smoke coming from? And it's always smart to only do one thing at a time and test your work, before going on to another issue!! Are the brakes dragging, and causing the motor to work harder?

05-30-2016, 08:05 AM	#3
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,875	Re: New motor install - it smokes Could it be your old engine smoked and the risidual oil in the muffler is trying to burn out?

05-31-2016, 09:41 AM	#4
Doodah Not Yet Wild Join Date: May 2016 Posts: 15	Re: New motor install - it smokes smallblock, thanks for your response. Yes the old engine was smoking. It did occur to me that it might be smoking from residual oil. But I wanted someone with experience on this type motor to respond. Didn't want to go on "gut instinct". The vendor is supposed to contact Yamaha for their explanation/response today.
Doodah Not Yet Wild Join Date: May 2016 Posts: 15

05-31-2016, 07:21 PM	#5
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,875	Re: New motor install - it smokes Experiance I work at Taco Bell Or I thought I as going to. Run the engine at medium rpm's for 5 minutes. Let cool down. Repeat. Should be fine. I've NEVER had a bad crate motor from Yamaha.

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05-31-2016, 08:42 PM	#6
smokindawg Gone Wild Join Date: Sep 2012 Location: Missouri Posts: 2,755	Re: New motor install - it smokes New engines will smoke some as they warm up to running temps and will do this for a few minutes........ I've run many a rebuilt engine with new paint and they all smoked off the engine, not from the engine. It's the paint baking. At least when I rebuilt and painted one it was. Did the smoke smell like oil or something hot?

06-01-2016, 08:17 AM	#7
Doodah Not Yet Wild Join Date: May 2016 Posts: 15	Re: New motor install - it smokes Smoke was coming from muffler/tail pipe. Smelled like oil.
Doodah Not Yet Wild Join Date: May 2016 Posts: 15

06-01-2016, 01:34 PM	#8
Doodah Not Yet Wild Join Date: May 2016 Posts: 15	Re: New motor install - it smokes smallblock, Did your crate motors come in with oil?
Doodah Not Yet Wild Join Date: May 2016 Posts: 15

06-01-2016, 09:47 PM	#10
Doodah Not Yet Wild Join Date: May 2016 Posts: 15	Re: New motor install - it smokes smallblock, Thank you very much. Although there was no indication it had been handled previously, I was concerned. It seems it was either mishandled in shipment, OR the old muffler is burning off old oil residue. Again, THANX!
Doodah Not Yet Wild Join Date: May 2016 Posts: 15

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