Guests - If You want access to member only forums on HSO. You will gain access only when you sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
Wishin I was fishin

evinrude help

11 posts in this topic

I have a 1979 85 horse evinrude that was running fine on Sat., but on Sun I was having problems when running wide open. It would slow down then speed back up like it was starving for fuel. I didn't have any issues when running slow, and when I had my buddy pump the ball while we were running it was fine. I checked my connections and all seem fine. I was wondering if there is a fuel filter somehwere. I pulled the cover and didn't see one, but I know nothing about outboards. Any help or suggestions would be greatly appreciated.

Share this post


Link to post
Share on other sites

So, when your buddy squeezed the primer bulb it ran fine? Follow the fuel line under the hood after it enters the cowling and see if there's a inline fuel filter.

If that's not the problem it sounds like a weak fuel pump.

marine_man

Share this post


Link to post
Share on other sites

I would check fuel tank venting. It could also be the primer ball. The primer ball also is a check valve, and they are notorious for failing. Make sure if you buy one that you get a good quality OEM (original equipment manufacturer) one, such as geniune OMC, Mercury, Yamaha, etc....

Share this post


Link to post
Share on other sites

I had a similar problem pump the bulb and it would run at high speeds I had to replace the fuel pump . I would recommend replacing the hole pump and not just the just the kit I had a 79 that the plastic was swelling in the fuel pump after sitting at home it would work fine in the drive way then break down on the lake 3 kits later I bought a pump. RR

Share this post


Link to post
Share on other sites

I would definitely check the fuel filter. On my '84 Evinrude, it's an opaque white canister with a size that would roughly hold a stack of quarters. Unscrew the top and check the filter screen for debris/gunk.

Primer bulb could be your problem (a good thing to replace anyway and cheap/easy to boot).

Make sure you don't have water in your gas. I did 2 years ago and it caused a lot of hesitation and up/down in RPM's. Disconnect the line right after your primer and squirt some in a glass to see if it separates.

As mentioned it could be a fuel pump, but you'd probably have to bring in to replace that.

Share this post


Link to post
Share on other sites

I just fixed this very same problem on my 87 Johnson 70 HP. Almost the same motor.

At first I thought the fuel (VRO) pump was bad. Turns out it was the primer bulb. A couple of bucks later and it's fixed.

Share this post


Link to post
Share on other sites

I would check fuel tank venting. It could also be the primer ball. The primer ball also is a check valve, and they are notorious for failing. Make sure if you buy one that you get a good quality OEM (original equipment manufacturer) one, such as geniune OMC, Mercury, Yamaha, etc....

Also, fuel lines can and do collapse, especially poor grade ones. Sometimes the collapse is internal and not seen from outer coating. Not to complicate the process, but another thing to consider.

Share this post


Link to post
Share on other sites

Thanks for all the help guys. I have purchased a new preimer bulb and spark plugs, and will do some more checking this weekend. Hope to try it out on Monday or Tues. Will let you know when/if I figure it out.

Share this post


Link to post
Share on other sites

please let us know how it goes! 99% of the time, the problem is something simple.

Share this post


Link to post
Share on other sites

Replaced the spark plugs and primer bulb and have had the boat out twice since. Everything seems to be running fine. Thanks for all the help and suggestions.Hope everyone has a great memorial weekend!

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • From Wikipedia Nope, nothing to see here. We had nothing to do with it. No involvement at all. 
    • I did cut off the radish tops and they do taste like radish but I am not going to get in the business of growing them..
    • Nice overreaction. Did you have too much caffeine today?   Nobody said or implied that the world would be better off without the united States.    What I did say was the world would be better off if we were not destabilizing governments and taking out the leaders that kept these radicals in check.    Where do you think all the refugees that are heading to Europe and here are coming from? They are coming largely from areas where we deposed, removed or destabilized the government in their home country. Do you think this is some kind of coincidence?   
    • The Shah was there for a long time before the revolution, but yes we had a role in his getting the job.   I don't recall anyone saying that we had a role in the disintegration of Lebanon.   I think that was the peaceful Muslims trying to take the whole place, with input from outside forces.  Syria maybe? 
    • My granny would fricassee them.  Cut-up, season, braise in stock, remove, then add flour and butter to thicken the stock, season to taste, and return the pieces for a few minutes.  If we had a few quail or dove she would add them in as well.  HERE is a really good looking rabbit fricassee with mushrooms, wine and herbs served over pasta.  Would like to try this with chicken drumsticks or wings.
    •   Ding, ding ding, ding! We have a winner. I sensed this was were this thread was heading   It's all America's fault and the world would be a much more peaceful place if America never existed. Why, these people would be the salt of the Earth if it wasn't for the mean and bad USA and throw in Israel in that   "America's Chickenzzz....are coming to home to roost!"   The common denominator is Radicalized Islam. You may not like hearing that but that is the common denominator including in other parts of the world were Radical Muslims cannot seem to get along with their own neighbors including others in their religion that aren't radical enough that have zilch, zero, zip, nada to do with the USA.   No other religion or belief system, I don't care if it's Christianity, Scientology, Paganism, Agnostics, Atheists,ect, has the issues with violence in modern times as Islam does. Spin it anyway you want but the facts cannot be denied.   This massive denial by some of what's sadly and painfully obvious is mind boggling. I get the desire to seem enlightened and non judgemental but that doesn't mean one should deny reality and blame  Fox or Briebart
    • Wonder if it is on Netflix?   Looks like there is actually a good reason to build the wall.....it could help keep the Mexicans out of harms way from drunken South Texas hunters. http://www.foxnews.com/us/2017/02/19/hunters-charged-in-texas-shooting-had-blamed-immigrants.html
    • Not that any of this has anything to do with atheism but...    
  • Our Sponsors