Thread Tools Search this Thread
Old 16 July 2015, 15:44   #1
Country: UK - England
Town: Warwickshire
Boat name: Sea Warrior
Make: Flatacraft -fletcher
Length: 4m +
Engine: 3.0 Merc. 40HPMarine
Join Date: Jul 2015
Posts: 27
F100 4CYL 4 Stroke High idle

The motor is idling high, (about 1.5K RPM) is it as simple as adjusting an idle screw? Any advice would be welcomed.

Mattacraft is offline   Reply With Quote
Old 18 July 2015, 11:49   #2
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 853
If it was fast idling on either muffs or a tub of water ,I wouldnt worry about it at the moment, if it is still fast sitting on the water, check the throttle arm/s are touching the stop, and that the throttle cable not adjusted to tight and hasnt slipped, if all those are correct then i would advice to to contact your nearest dealer.

uncle al is offline   Reply With Quote
Old 19 July 2015, 14:59   #3
Country: UK - England
Make: Humber / Phantom
Length: 5m +
Engine: Lots of Yamahas
Join Date: Feb 2006
Posts: 114
It should be idling at approx 700-800 in water, out of water on muffs will increase 100rpm.

If left at 1500 you are doing damage to the engagement dog when shifting into gear.

Is it actually revving too fast or is the tacho incorrectly set?

If it is revving too fast and cables are all adjusted correctly then the idle screw is normally wound in to mask stalling due to slight restrictions in the low speed jets.
phantom 19 is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:06.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.