86 merc l6 115 hp Jet

[canoemang]

1986 mercury inline 6, converted to ob jet.

Motor starts and runs great, idles at 800.. all day and wot is 5300 - 5400 rpm..

The issue i am having is when i am at wot and go into a power slide it drops down to 4500 rpms. it isnt cavitation of the impeller or it would raise the rpms..

I went through today, cleaned all 3 carbs,new floats,needles and seats and did a link and sync as procedure on my manual and new gas line through out the whole motor.

Problem persists, it wont do it if i do a normal turn but as soon as i start sliding it cuts, i am not and have not ran it more than needed for testing, i don't want to burn up a piston.

It happens when i turn either way and it only cuts out for 4 or 5 seconds, i had a buddy check the wiring and none of that is binding, my gas line is free and not binding either. If i am at idle and turn hard and hit wot it doesnt do it, tried both ways. I checked all of my grounds etc and everything is tight.

I keep thinking maybe a float is getting caught up or a needle is sticking but changing both didn't remedy, but it did make it so it doesn't cut out as long..

any ideas?

 

[Jlawsen]

Re: 86 merc l6 115 hp Jet

Normally when you convert to jet you re-jet the carbs. The Merc Manual has the jetting that you should be using. A 115 prop shaft hp = about 90 hp at the Jet pump. Thats a new jet motor.

You're probably closer to about 70hp and you don't have the hp to hold the rpms up during the slide.

 

[canoemang]

Re: 86 merc l6 115 hp Jet

Normally when you convert to jet you re-jet the carbs. The Merc Manual has the jetting that you should be using. A 115 prop shaft hp = about 90 hp at the Jet pump. Thats a new jet motor.

You're probably closer to about 70hp and you don't have the hp to hold the rpms up during the slide.

It would hold it all last summer.. This just started this spring.

and a 115 breaks down to a 80 HP outboard..