Like Tree1Likes
  • 1 Post By mrv8outboard

outboard problem

Reply

Old 06-25-2018, 11:18 AM
  #1
Registered
Thread Starter
 
Join Date: Jun 2007
Posts: 96
Default outboard problem

My bil has a bass boat (don't know the year) that has a 150 merc on it. If you stay below 4000 rpms it will runs fine if you go above 4000 rpms it shuts down for awhile.
jrdonnellyjr is offline  
Reply With Quote
Old 06-25-2018, 12:04 PM
  #2
BUP
Registered
iTrader: (8)
 
Join Date: Jul 2011
Location: Ft. Worth TX
Posts: 9,089
Default

Way not enough to even think about what is wrong and what testing has been. Start with the basics --- Fuel --- air -- Spark

the fuel pressure is ?

Does it have spark on all cyc ?

Compression is ?

Is the air box restricted or did something get suck thru in the air box into the cyc ?. Believe it or not that can be common. Dirt dabbers is our issue and will take out a powerhead in 2 min. when that happens. Not uncommon at all.

This question and the lack of info is like calling the auto service store and providing very little info - example - Hello ---- My car does not work can you help me out ?
BUP is offline  
Reply With Quote
Old 06-25-2018, 04:17 PM
  #3
Registered
Thread Starter
 
Join Date: Jun 2007
Posts: 96
Default

Originally Posted by BUP View Post
Way not enough to even think about what is wrong and what testing has been. Start with the basics --- Fuel --- air -- Spark

the fuel pressure is ?

Does it have spark on all cyc ?

Compression is ?

Is the air box restricted or did something get suck thru in the air box into the cyc ?. Believe it or not that can be common. Dirt dabbers is our issue and will take out a powerhead in 2 min. when that happens. Not uncommon at all.

This question and the lack of info is like calling the auto service store and providing very little info - example - Hello ---- My car does not work can you help me out ?

Yes, I understand what you ae saying I was just hoping this has happened to someone and they could say "it is the..." thanks for your help.
jrdonnellyjr is offline  
Reply With Quote
Old 06-25-2018, 09:05 PM
  #4
coolrunning racing
VIP Member
 
mrv8outboard's Avatar
 
Join Date: Feb 2001
Location: cape cod
My Boat: built myself 1994
Posts: 547
Default

Well of the cuff the most likely issue is fuel. You have a restriction,air leak or lift pump failure. If it has two switch boxes it my be the high speed winding's in the stator. With more details there may be more help.
SB likes this.
mrv8outboard is offline  
Reply With Quote

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 On
Pingbacks are On
Refbacks are On


OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser