2000 Johnson 115 ocean pro, How should it idle? - The Hull Truth

seewll · 02-24-2007, 07:05 PM

I posted a question about the carbded Johnson. I went ahead and bought it. but when I let it idle,using the muffs, it will sort of ramp up and down and puff a little smoke, Not sure if it has bad gas from setting, or if it just needs some tuning, could it be that it is putting a little much oil when it puffs. It appears to have new plugs, How should the motor Idle? will it ramp up and down and puff a little almost like a burp of smoke. Other than that it seems to be great.

seewll · 02-24-2007, 08:23 PM

Not on this one. It does run good, and the price was good on the boat, One owner, and looked well taken care of. I am going to have it checked out for spring anyway, just wanted to know a little information to make sure the boat service mech, does not steer me wrong. I know they replaced the VRO last year. Would this have any affect. I will get fresh gas for it. I think that may be part of it. any other information would be great.

seewll · 02-26-2007, 07:29 PM

How would the gap on spark plugs affect the idle. I removed the plugs and replaced them, I checked the old ones and they were 020 the specs call for 030. Just wondering would this cause any issues, There is not a lot of difference in the gap, but not to spec.

A1 Outboard · 03-01-2007, 11:37 PM

You cannot judge the idle quality while the motor is run on a hose flusher. There is no exhaust backpressure that is present when the motor is in the water and the carburetors are calibrated for that backpressure. On a hose, the motor runs leaner and at a higher rpm. Stale fuel can also affect the drivabillity of the engine

The correct sparkplug for that motor is Champion QL78YC gapped at .030". Too narrow a gap can affect the idle and acceleration on your outboard.

Mr. Bee

seewll · 03-11-2007, 09:36 PM

A1, I pulled the plugs on my Johnson and noticed that the left lower one looked like it had not sparked and the other above it was bit darker, then I pulled the Right side and they looked very dark like they had been sparking alot. I posted a thread about fluff coming out of the prop, and people suggested I check the plug wires, they were good so I pulled the plugs, I think I may have two cylinders not firing. This may explain the unusal idle. shouldnt the plugs look uniform? If I change my power pack is there adjusting like timing or something I well need to do?

A1 Outboard · 03-12-2007, 08:22 AM

Normally the plugs will look diferent in the various cylinders when run a low speeds.

If you were to replace a powerpack, checkng the timing is recommended

seewll · 03-12-2007, 09:54 PM

A1 decided to drop it off at the shop, I want to make sure it is in good shape for the season, I really thank you for answering questions! I am sure you get a lot of dumb ones like mine.