Question about Boating
I bought a new Sun Tracker 20' Party Barge with a 60 HP BigFoot. Have a question about the throttle control. After putting shifter into Fwd we get throttle response immediately after going into gear. But Reverse is a different story. After selecting reverse, it does go into gear fine, but we have NO throttle response until you continue moving the handle half way to the floor?? Dealer says everything is to specs. Is this the way they are suppose to operate? Thanks for your time.
Posted by Anonymous on
You can adjust the throttle position better than what you have described
the first forward action is the gear engagement and the at least 1/2 " lever movement before the engine starts to rev up
the same for reverse
that gives more control over the required rpms
Posted on Jun 02, 2017
I am a Mercury certified technician. What you need to do is take it to a Mercury dealer and have them hook it up to the computer. It sounds like the engine could be in Guardian mode or possibly a high RPM misfire. It is not something that is common and the computer program that Mercury has for those is able to test misfires and all sorts of cool stuff. It can also tell you if the engine was broke in properly, how many actual running hours are on it and even at what RPM each hour was ran. It will be able to bring up all faults that it has had in the past and any faults that are current. I know that you are probably looking for a quick, easy fix but for this problem I dont think that there is any way around taking the engine in. For what it is worth, if they charge you for more than 2 hours to run it on the computer then take it somewhere else. I can fully test the engine with the computer in about an hour. The only reason that it would take any longer is if they had to put it in the water to duplicate the problem but most shops will have a test tank that is capable of running your engine under a load at full throttle. Sorry for the bad news but I cant think of any other way and throwing new parts at it is just going to get expensive quick.
Posted on Aug 11, 2009
See if you can turn down the base idle some. Then check your gear lube, sometimes you can get an airpocket and the top end is dry. Last, if still not fixed, see if you can adjust the cables so that the throttle RPM changes after the gears do.
You want a little lag in the throttle so you don't take out a dock when coming onshore.
Posted on Mar 17, 2010
This Can Be a Few Problems!
1- Check The Control Cables Are Set In The Neutral Position Correctly
Check And Try Again -If Not
2-Is The Control Box Moving The Lever Fully To Forward And Reverse Positions- If Yes
3- Remove Gearbox ,Remove Bearing carrier ,Remove Prop Shaft,
In The Front Of Prop Shaft There Should Be A Pin With Three Ball Bearings **(Will Give You The Problem You Are Having If Left Out) The Pin Should Not Be Flattened Or Badlly Worn ,
Replace If Worn
The Shift Cam Located Inside Gear Box Right At The Back Should Not Be Cracked Or Chipped ,You Can See It With A Torch Through The Middle Of Forward Gear ,Replace If Damaged.
Re Assemble And Test.
Posted on Mar 17, 2013
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