fuel pump Evinrude 50HP rebuild

[eurolarva]

I just picked up this motor. Model is E50TLCUD. From what I can find on the internet this should be from 1987. I picked up both Clymer and Syloc manuals and neither show how to rebuild the fuel pump however I am finding fuel pump repair kits online which I am assuming are rebuild kits. Am having a tough time keeping it idling and the primer ball wont get hard. I have a different tank but no cap for it so I plan on trying that first once I get a new cap. My questions are can the pump be rebuilt or do I have to buy a new one. Next question is the impeller kit necessary or can I just buy an impeller. Looks like there are a bunch of gaskets that need replacing when doing the impeller change but I want to make sure that the kit is needed.

Evinrude shows 4 different carb kits. I think two are orginal parts and the other two are sierra numbers. Is the reason for two numbers because the upper and lower carb take different kits?

 

[milliesdad]

Re: fuel pump Evinrude 50HP rebuild

All I can tell you is I have the identical motor with the VRO working. Gets my 16ft Sylvan up on plane and runs great.

Get the impeller kit and change out everything. Then there will be no surprises when you are out on the water.

 

[eurolarva]

Re: fuel pump Evinrude 50HP rebuild

Bump

 

[bonz_d]

Re: fuel pump Evinrude 50HP rebuild

I have a 50hp and a 60hp Johnson and have seen the different rebuild kits listed on BRP. I believe the difference is listed as to different year and HP. Some of these 2 cylinder engines did use different carbs for the top and the bottom.

Read the descriptions carefully, should tell you which kits you need.

 

[eurolarva]

Re: fuel pump Evinrude 50HP rebuild

I used to spend a lot of time on Iboats mainly in the Chrysler forum. If anyone of my questions was posted someone who knew about these motors would have replied normally in a couple of hours. I have not had any of these questions answered and the post is over two days old. Does anybody on this forum know anything about Evinrudes?

 

[bonz_d]

Re: fuel pump Evinrude 50HP rebuild

No questions answered! Thanks. Guess you don't want to look at the BRP parts breakdown for the carbs as suggested.

I have no experience with the VRO engines so I can't answer your question about the fuel pump. Yes you can replace just the impellar, you can also buy all the gaskets, Oring and bushings separate. Just what you will need to replace you will have to determine by looking at each piece.

 

[Will Bark]

Re: fuel pump Evinrude 50HP rebuild

Your engine is indeed a 1987 50hp; if you are having trouble keeping the engine idling have you rebuilt the carb especially the idle ports underneath the welch plug? Have you tested the output of the fuel pump or do you know it's not pumping? As to the water pump when I go in one I want to put the entire kit in as opposed to just the impeller since I don't want to go back later for something else; that's your choice. Good luck

 

[eurolarva]

Re: fuel pump Evinrude 50HP rebuild

I have ordered the kit for the impeller. My experience with primer bulb not staying firm has been a blown or cracked diaphram in the fuel pump. Can I rebuild this or do I have to replace it. In my original post I mentioned that both Clymer and Syloc do not show rebuild as an option for the pump but a repair kit is available here at Iboat but it does not show what is included. I prefer not to take the carbs apart if I dont need to. I have never worked on a motor with dual carbs and would prefer to stay with the simple fuel pump and fuel lines before tackling the dual carbs and then doing the link and sync.

 

[bonz_d]

Re: fuel pump Evinrude 50HP rebuild

BRP also shows a repair kit for this so I would assume there is a new diaphram included.
I can say I only tried once to rebuild one of these type pumps and had no luck. There are reed valves inside and if they get bent just the tiniest bit then ooooppps.

As Will asked did you try and test the pump you have?

 

[Will Bark]

Re: fuel pump Evinrude 50HP rebuild

I don't know about Chrysler products but on OMC/BRP models the primer bulb is supposed to go soft once the engine is running since the bulb just becomes part of the fuel line. The bulb is not supposed to go flat since this would indicate a restriction in the fuel line between bulb and tank. Good luck. Have you taken the fuel line off at the carb and cranked engine to see if the pump is pumping?

 

[eurolarva]

Re: fuel pump Evinrude 50HP rebuild

thank you for the information. Fuel bulb is not going flat is just never gets hard that i why I am thinking a bad diaphragm. My garbage pail I use for a test tank is not large enough for this motor and I do not have muffs for it. We are hopefully hitting a lake tomorrow and will get better information on what is happening. This motor is my friends who has limited knowledge on motors. Runs good at WOT but wont stay running at low rpm. Muffs might not re create this condition. If we cant figure this out on the water we will get muffs and try and figure where the problem is. I am not crazy about taking the carbs apart just yet till I get more comfortable with the motor. I am pretty comfortable with Chrysler and Mercs but have no history with Evinrude. Sorry for being negative but felt that my basic questions weren't being answered. I have everything I need now and will go forward will hopefully post with the results later.

 

[bonz_d]

Re: fuel pump Evinrude 50HP rebuild

This last post says alot. I hate to say it but if it's running strong at WOT but not at idle then the place ot look is the low speed circuit in the carbs. Any idea when the last time the fuel hoses were replaced? All it takes is a small piece of hose to flake off and the next thing ya know you're in cardiac arrest.

As a note my 1983 60hp Johnson the bulb does not get hard either and it runs like a top.

 

[bonzoscott]

Re: fuel pump Evinrude 50HP rebuild

Pull the line leading to the carb/s. Crank the motor and see if it squirts fuel. If it does, got to carbs. If it doesn't - there are rebuild kits, try ebay. You may end up spending $50 and chancing a correct rebuild when you can buy a new OEM pump for $70-80. Also, it's bearing down on a Holiday week-end, start of boating season. I think many of the specialist may be quite busy.

 

[eurolarva]

Re: fuel pump Evinrude 50HP rebuild

Ordered new carb kits from I boats. Had to order a new rectifier as well. Found fuel like at a local place and will hopefully be able to get this licked next weekend.

 

[bonz_d]

Re: fuel pump Evinrude 50HP rebuild

Sounds great. If you have too take your time and take pictures and notes as you go. Will help putting it all back together. Any questions we'll be here. Good luck and post back your results!

Once you have them off and apart use some good spray carb cleaner and spray into the hi speed, low speed ciruits and thru the ports where the fuel enter until you have cleaner coming out the other side. Then blow it out with air in a can. Repeat the carb cleaner and air.

I once had an 18hp Evinrude that I had to do the slow speed circuit 4 times before I got it cleared enough to idle like it should. Thing would run terrific above idle. At idle it would lean sneeze and stall out.

 

[Swan Man]

Re: fuel pump Evinrude 50HP rebuild

Sounds great. If you have too take your time and take pictures and notes as you go. Will help putting it all back together. Any questions we'll be here. Good luck and post back your results!

All, really appreciate the advice, as I am the guy who knows nothing of motors, but just bought the one in question. Will replace the fuel lines, rebuild the carbs, to Eurolarves advice, one at a time. Will keep you posted. Thanks again for the advice!