1976 35hp running kind of flat after WOT

[Azonic]

Took out the boat last night...

I will start here..

Brand new fresh pre mix @ 40:1

Water pump works well in the tank...

We started her up no problems, ran out...
about 15 mins of run time she started to stumble a bit flat...
back off throttle, idles fine...
Rev up to a certain point, and she goes flat again...

Force the issue and you can get her back at WOT

Am I not getting enough fuel to the carbs?
Or am I running to rich/lean on the top end?

Thanks for the help

 

[Daviet]

Re: 1976 35hp running kind of flat after WOT

You might try pumping the primer bulb and see if it will pick back up. If it doesn't remove 7/16 plug on front of carb bowel, the high speed jet is behind it. Remove jet and clean and see if it helps, if so it is time to remove carb and overhaul. If engine has been sitting for a while, you might want to check compression and spark while you are at it.

 

[Azonic]

Re: 1976 35hp running kind of flat after WOT

That may be the biggest of the issues...

The motor has sat...

It was taken care of. Run dry, bowls drained, then covered...

I will check the high speed jet...

And new plugs...

Other than that, the hole shot was good, and she planed out really nice