84 Evinrude 25hp Link and Sync clarification

shimanok2

Seaman
Joined
Jul 31, 2011
Messages
53
Hello All,

Model # E25RLCRD. I purchased this motor for cheap last year and have so far replaced all the fuel lines, rebuilt the fuel pump and carb, replaced the thermostat, cleaned inside the hood/cowlings and rebuild the lower unit with all new seals and a new-to-me prop shaft. It starts first pull typically and idles fine, does seem to throttle up fine too, as much as can happen in a bucket. I've been looking through the Selec manual and reading through the forums on the link and sync procedure and do believe that mine needs adjustment. Currently the roller lies between the 2 marks on the plate but according to the Selec manual the Primary pickup location (B) is "starboard side of mark". Well this implies only 1 mark and mine has 2. Additionally every video or thread I've seen of similar years (also listed B as the pick up location in the manual) are on the port side of the 2 marks or centered between them. Reference Low Idle photo.

Second, it seems the carb is opening too much (See Full Throttle Carb). I take it this is just the carb linkage adjustment but how far off of the plate should the roller sit at idle? Or should it always be touching?

Lastly, There is some play in the plate causing the roller to not always line up between the 2 marks. I've traced it down to the throttle gear being loose (Reference Throttle Gear photo). I don't see a way of tightening this other than some shim stock. Or is a new plastic pin required? Also wondering if the plastic bushing it sits in has just disintegrated causing the slop. Can any one confirm if this gear can be removed without removing the lower cover? Seems like I should be able to remove the vertical throttle post and slide the gear out, not positive though.

Overall I'm not very impressed with the Selec manual and now do wish I just paid the extra for the OEM.

Thanks for any and all input!
 

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shimanok2

Seaman
Joined
Jul 31, 2011
Messages
53
To add to this, I'm wondering if the manual is wrong. It's calling out the primary pickup location on the 30 and 35hp models as between the 2 marks. Would they really have different setups on nearly the same motor?
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,435
Over thinking on your part.----Post compression numbers.----Post pictures of that thin rod on side of the block...---Picture of the adjustable stop at the back at slowest idle.
 

shimanok2

Seaman
Joined
Jul 31, 2011
Messages
53
Compression is 110-115 on both. This is pull start too which is not the easiest. I'd think with electric start the numbers would be higher.

I think these are what you're asking for. I adjusted the nut on the rod back some towards the plastic stop. Prior to this it was just over 1/4" away from the stop.

Thank you!
 

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racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,435
Fact-----When the stop adjustment is CORRECT it often looks WRONG to a novice.-----So put it back at 1/4" gap and test run.
 

shimanok2

Seaman
Joined
Jul 31, 2011
Messages
53
I apologize for the late response. I never received an email notification. I changed the stop adjustment back and will try to run in a barrell tonight.
  • First thing I noticed is in the idle position the roller is maybe 5/8" away (port-side) from the 2 marks (Roller Idle).
  • Also the Carb doesn't start to open until the roller is way past the 2 marks (Roller Carb Movement).
  • In this configuration @ WOT the butterfly is horizontal (Butterfly Full Throttle)
  • If I adjust the carb linkage so the roller touches or nearly touches the cam, @ WOT the butterfly is over rotated (Butterfly Full Throttle 1)
 

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  • Butterfly Full Throttle.jpg
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  • Butterfly Full Throttle  (1).jpg
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