1972 25 hp evinrude 2520

[jethro66]

hey guys wats up? I took my motor out on the lake today to test out the motor. It starts on second pull but when I take off its bogging like something is holding it back. I open the cowl and I see on top of the fuel pump seperate from the fuel pump theres a hose that is cut off I lok beside the carb and I see thisnipple with no hose on it . when it runs I see gas coming out and the other one has air blown out? one nipple is bgger then the other one do they connect ? i know i need a New connector as weel Is this a good motor please help!!

 

[OBJ]

Re: 1972 25 hp evinrude 2520

Sounds like the oil recirc hose jethro. What it does is takes the fuel/oil mix that would other wise lay at the bottom of the reed cage cover and puts it back to the engine.....to the upper crankshaft bearing I believe. Yes you want to replace the line if it's cut.

When I get back to the shop Monday, I'll have a look at manual and make sure this is it. Maybe one of the other guys will jump in and verify it.

 

[jethro66]

Re: 1972 25 hp evinrude 2520

One hole is smaller. Its the one beside the fuel pump. this effets per formance ? What kind of hose should I get? Can i use zip ties?

 

[OBJ]

Re: 1972 25 hp evinrude 2520

I really can't picture the set up in my head and the parts break down don't show enough. But get a hose that will fit the smaller nipple.

If the nipple is going into the block, it could effect performance....it's like an air leak in the block.

Once I see the picture, I can tell for sure.

 

[jethro66]

Re: 1972 25 hp evinrude 2520

thanks Admiral !! Great site!! I see a small hose there can I get a little bigger hose and connet them together with zip ties or just get that clear hose .? Thanks!!

 

[tashasdaddy]

Re: 1972 25 hp evinrude 2520

it needs to be fuel/gas rated.

 

[Xcusme]

Re: 1972 25 hp evinrude 2520

Jethro, Is there any chance of getting a photo of the hoses??

 

[jethro66]

Re: 1972 25 hp evinrude 2520

No sorry

 

[jethro66]

Re: 1972 25 hp evinrude 2520

how do U adjust the carberator? I dont see any adjustment screws? All I see is the lean rich dial . What is the best setting?

 

[jethro66]

25hp evinrude

25hp evinrude

how do u I
adjust the carb i dont see any srewws??

 

[Xcusme]

Re: 1972 25 hp evinrude 2520

(Carburetor Adjustments - Two Adjustable N/Vs)
(J. Reeves)

Initial settings are: Bottom high speed = seat gently, then open 1 turn out. Top slow speed = seat gently, then open 1-1/2 turns.

Setting the high and low needle valves properly:

NOTE: For engines that DO NOT have a shift selection, obviously there is no NEUTRAL position. Simply lower the rpms to the lowest setting to obtain the low speed needle valve adjustment.

(High Speed) Start engine (it will run pretty rough), shift into forward gear, take up to full throttle. In segments of 1/8 turn, wating for the engine to respond between turns, start turning in the bottom high speed needle valve. You'll reach a point whereas the engine will either start to die out or spit back (sounds like a mild backfire). At that point, back out the needle valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest setting.

(Low Speed) Slow the engine down to where it just stays running. Shift into neutral. Again in segments of 1/8 turns, start to turn the top needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running. Eventually you'll hit the point where the engine wants to die out or it will spit back. Again, at that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

When you have finished the above adjustments, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.