question about break in periond for 250 Merc ProXS

This topic has 9 replies, 8 voices, and was last updated 9 years, 5 months ago by PhilAddison.

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September 27, 2008 at 8:08 pm #345692

6packbacklash
Participant

Buddy and I took the new Puma FTD w/250 Merc ProXS to the lake last weekend to run through the Merc Owners Manual break in for the outboard….They recommend: “after a 30 to 60 second warm up, run between 4000 and 5400 RPMs for the first hour, changing speed every 2 minutes and have trim all the way down for the break in period.” At 4800 to 4900 RPMs and the trim all the way down, the hot foot is at full throttle. The only way I could reach 5300 to 5400 RPMs was to bump the tilt up a couple of times. Does this sound about right or is my HOT Foot out of adjustment? Thanks for the feedback, as Im pretty new to Bass Cat boats and Merc Motors. John W.

September 27, 2008 at 8:33 pm #345712

Chuck Hannaford
Participant

YOu will get some different opiinions on this. I keep my motor trimmed all the way down throughout the break in proceedure. I vary between 3-4 K the first hour and in the 4s the second with an occasional full throttle burst for about 30 seconds in the second hour. You cant, as you say, get the Rs to 53 unless you bump the trim but keeping a load on the engine during break in is more important. This is what the Merc techs have told me and my 09 runs like a scalded ape.

September 28, 2008 at 1:10 pm #345730

Bass Cat Boats
Keymaster

Do you have the Smart Craft gauges? If so I would not touch the trim until the 120 minutes has counted off. Its not all that bad. If you can just fill her up and go ride around. I did that with my 08. 6Pack these hours are really important for the motor. The other problem is if they are not followed the dealers can tell with there little computers.

September 28, 2008 at 3:38 pm #345749

Bass Cat Boats
Keymaster

It just needs a load on the engine to record break in. The ECU is able to measure torque in the operation and requires a certain range to record break in. Thus the hull can not be free on the water and generate engine torque. A little trim is allright and if the gauge is tick tocking the break in minutes down your fine.

September 28, 2008 at 9:11 pm #345763

Tideman
Participant

YA RECKON I NEED TO BREAK MINE IN AGAIN?????????????????????????????????

September 28, 2008 at 10:07 pm #345785

MIKE LUCAS
Participant

Your owners manual also mentions not to trim the engine above verticle during break in… ie… no rooster tail. keep the engine tucked all the way down the first hour… rpms 3 to 4 thousand… hour two, 4-5 thousand.. vary speeds every two minutes… at the higher rpms you will have to trim up just slightly but not much… next three hours vary speeds every ten minutes… Dont run WOT (wide open throttle) for more than 3 to five minutes for hours 3 through 4.

September 28, 2008 at 10:08 pm #345799

6packbacklash
Participant

Appreciate everyones feedback. Sounds like I did everything A OK… thanks, John W.

September 28, 2008 at 11:08 pm #345825

Leebr1966
Participant

You cant go wrong if you go by the owners manual. Page 53 explains the proper breakin Procedures. BREAK-IN PRODEDURES 1. For the first hour of operation, allow the engine to warm up for 30-60 seconds. a. Run the engine at varied throttle settings, the majority of the time between 3000 and 4500 RPMs or Three-Quarter throttle. b. Change engine speed approximatly every two minutes, and avoid continuous operation at idle speed for more than ten minutes. Short bursts of Full throttle for a period up to ten seconds are acceptable. c. Avoid trimming the outboard out (up) beyond a verticle trim postition during operation. 2. For the Next three hours of operation, change engine speed every ten minutes.

December 20, 2016 at 3:35 pm #345848

C130
Participant

Does the “break in mode” limit RPMS? Its double oil I believe but wondering if it actually limits RPMS.

December 20, 2016 at 11:56 pm #345862

PhilAddison
Participant

C130 wrote:Does the “break in mode” limit RPMS? Its double oil I believe but wondering if it actually limits RPMNo. Not until it hits the rev limiter @ 6000+
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