1966 evinrude 33 hp motor

[Dennishazard]

I have a 1966 evinrude 33 hp motor on a boat and it seems to run just fine except when its in slow, it wants to conk out, is there anything I can do for this problem ? im new to this
thanks

 

[F_R]

Have you experimented with adjusting the slow speed mixture knob on the carburetor? Give it a tweak either way or both and see what happens. You won't hurt anything, so don't be afraid of it.

 

[Dennishazard]

yes I have done that and it seemed to help somewhat until I shifted even lower then it conks out and is hard to start, like I said im new to this but I do have some knowledge about motors, I just got this boat and took it out and couldn't get it started, so I sprayed out the carb, cleaned the gas filter, tinkered with both high and low mixture knobs and it seemed fine until I shifted even lower then it stalled, I also put new plugs in, it seems to smoke a lot too, maybe its bad gas mixture ? what is proper fuel mix for this anyway ? gas was with the boat have no idea how old it is, man I really appreciate your help, wanted a boat really bad to go fishing don't want the wife to think I got screwed anything else you can tell me ?like I said it seems to idel better that I adjusted it but still wants to conk out when shifting even lower and hard to stard then
thanks

 

[oldboat1]

Initial settings for the carb needles are 1 1/2 open for the l.s., and about 1 turn for the h.s. (lower) needle. Final settings are typically a bit leaner than that (clockwise). Best set in the water (Use a barrel if at home -- water about half way up the leg). You need to change out the impeller as a first priority. Final h.s. setting is in the lake at WOT or close, then return to the l.s. and check/adjust.

Start with fresh gas, ratio is 24:1. Plugs are Champion J4C. You may need to disassemble and clean/rebuild the carb. Spraying is rarely enough.

 

[RCO]

Fuel ratio on that motor is 50:1 with TC-W3 rated oil. Be sure to set the idle speed once you have the mixtures dialed in also.

 

[oldboat1]

Here's some info for you. (Note the fuel ratio -- your call on the '66): http://www.fiberglassics.com/library...service002.pdf

 

[Dennishazard]

are you talking about the valves on the high and low settings ? or the black knobs that are on them for the rich / lean mixture ? how come the impeller needs to be replaced ? what about the fuel mixture ? got two different people on here telling me 2 different things, its a 6 gallon can how much oil should go in it ? I told you im new at this so I don't mean to sound dumb, thanks guys I really appreciate it

 

[Dennishazard]

how does one replace the impeller ?

 

[lindy46]

Adjust the idle stop screw on the port side of the engine - where the throttle cable hooks up.

 

[oldboat1]

If new to outboards, best to start with a service manual: https://www.ebay.com/itm/1966-Evinr...966+manual&_from=R40&rt=nc&_trksid=m570.l1313

 

[Dennishazard]

I already bought a service manual

 

[jimmbo]

OMC went 50:1 across the board in 1964. That was with any old outboard oil, or even non detergent SAE 30. TC-W Oil was still a few years away,

 

[racerone]

Maybe coils are cracked and failing.-----You install a new impeller because the motor does NOT have a warning system on it.----You would destroy the motor if water pump failed !!

 

[Dennishazard]

I will check the coils, but I’ll try to replace the impeller first, that is in the lower unit correct ?
thank you

 

[racerone]

Your manual tell you how to and where the impeller is.