1973 evinrude 65hp slow on water ???

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

Because of your Timer Base not traveling all the way to the stopping point on the block explains your whole problem Yes, that wire harness on the right is the Timer base Trigger/Sensor wires, Stator and Charge Coils on the left, two wire harnesses with 4 wires each 8 wires total, 4 wires for the three triggers and the other 4 wires are for the Stator and the three Charge coils. You should be good to go once you give that timer base wire harness a little slack

thanks for your reply i plan to hit the water in the am i will post results

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

ok guys got some results after further testin i found i was running 2 cylinders instead of three one carb was pretty gunked up i pulled all three and spent a few hours yesterday cleaning the heck out of them motor fires right up and sound alot better but still wont go WOT on the water . the history is unknown on this motor it went through a few hands before i got it i do know that is has all new top end new head an head gasket new carb kits new plugs im trying to get a timing light but does any one know what the timing should be also would it hurt to adjust the timing base while running? yesterday i pulled the timing base lever back while it was idling and the engine started to bog so im assuming that the timing base work any tip or pointers
i am now running on all three cylinder just no WOT on the lake

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

Which cylinder is dead Top, Middle or Bottom??? Did you check the coil for Spark with a spark tester at 7/16" gap on the dead cylinder? If it doesn't spark swap it with one of the other two coils/wire connections and check if the coil will spark. If it doesn't spark then you have a bad coil but if it does spark you have a bad Power Pack or Trigger. Also check the other coil you swap with if it will fire on that dead cylinder to rule out faulty Trigger or Power Pack.

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

Which cylinder is dead Top, Middle or Bottom??? Did you check the coil for Spark with a spark tester at 7/16" gap on the dead cylinder? If it doesn't spark swap it with one of the other two coils and check if the coil will spark. If it doesn't spark then you have a bad coil but if it does spark you have a bad Power Pack or Trigger.

the dead cylinder wasnt getting fuel i cleaned all three carbs and all three cylinders are running now just still no WOT on the water

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

Ok so you did a spark test on all tree coils with a Spark tester set at 7/16" very important. A bad coil will fire a spark plug outside the motor but if the coil winding circuit is open it will not fire in the cylinder where there is more resistance. Is the timer base moving all the way to it's stopping point? Also are the spark plugs new?

What is the highest RPM the motor will run on the water under a load?

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

Ok so you did a spark test on all tree coils with a Spark tester set at 7/16" very important. A bad coil will fire a spark plug outside the motor but if the coil winding circuit is open it will not fire in the cylinder where there is more resistance. Is the timer base moving all the way to it's stopping point? Also are the spark plugs new?

What is the highest RPM the motor will run on the water under a load?

dont have a rpm gauge on the boat but u can deff tell by the sound it not even close to reaching max rpm the base does hit the stop but im wondering if someone before me has messed with that adjustment

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

You may also want to get a service manual for this motor if you don't already have one and check if the Throttle Cam is properly adjusted.

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

There is a little timing mark on the Throttle Cam, that mark should be in line with the top side of that Cam follower Roller when the Three Throttle valves in the three Carbs start to open.

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

There is a little timing mark on the Throttle Cam, that mark should be in line with the top side of that Cam follower Roller when the Three Throttle valves in the three Carbs start to open.

that lil mark on the throttle cam is where it should be with the cam follower roller all three carbs open wide open just wont rpm up in the water all three cylinder are running now if i pull any one plug boot off while running engine bogs down

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

Well the only thing left is the FUEL PUMP, get back on the water and when the motor bogs down, get someone to pump the hell out of the primer bulb and report back. If it speeds up and starts to run or runs better, get a new fuel pump.

If you can, lets get a video the next time you run it on the water.

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

Well the only thing left is the FUEL PUMP, get back on the water and when the motor bogs down, get someone to pump the hell out of the primer bulb and report back. If it speeds up and starts to run or runs better, get a new fuel pump.

If you can, lets get a video the next time you run it on the water.

rudemen thanks for ur replies i plan on hittin the water today at some point ill try and get a few videos

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

No problem, nothing worse then having a boat and can't use it. It's a shame you don't know the history of this motor!!!

You mentioned that one of the carbs was dirty gummed up, was that the top carb by any chance??? If so, I would check the crankshaft seal on top with a little bit of two stroke oil, looking to see if the oil gets sucked or blown past the seal and crankshaft with carbs installed and choked. Also check the (Reed Valves, Bent, broken, trash, and improperly seated) next I would focus on the Carbs again blow out all passages with carb cleaner check flow of carb cleaner coming out of passages on all three carbs if one seems to have less flow then the others it may still have Trash/Gunk in it and will need to focus more on that carb, there may very well be gunk and trash still in there.

Check Float levels for proper adjustment, Carb gaskets to intake for any breaks, tears, air leaks, Intake Manifold gasket and both Leaf plate gaskets.

If you get to video the motor running on the water please do so with the cover off.

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

ok i wasnt able to get on the water today lots of storms today but i did take a video of the linkage and the movement of the timing base note the timing base stop movement long before the carbs hit WOT. is this normal? Or is the timing base supposed to travel as far as throttle? meaning is it supposed to stop when the throttle stops?

heres a video
http://s532.photobucket.com/albums/ee327/lukepatten/?action=view&current=VID-20120426-00006.mp4

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

bump to the top

 

[busted-bayliner]

Re: 1973 evinrude 65hp slow on water ???

ok after all three carbs getting a rigorous cleaning and adjusting the timing i finally got this boat moving on the water like it should ill have a short video clip below thanks for every ones help
link to video
http://s532.photobucket.com/albums/ee327/lukepatten/?action=view&current=VID-20120427-00007.mp4

 

[Rudemen]

Re: 1973 evinrude 65hp slow on water ???

Glad to see you got her all worked out and screaming the way she should. Congrats