dropped from 30 to 5 mph 30hp johnson

[opag07]

Hi pros,

Can someone give me an idea what could have cause the drop after making a sharp turn two week ago after the water started to get choppy (14 foot BW),
I've hussle a tow back to the doc. I've changed the spark plug and chankcase oil which needed changing.. Took it out today and still at 5mph.. also have my trolling motor now..

thank

 

[mables]

Re: dropped from 30 to 5 mph 30hp johnson

What motor do you have?

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

It's a E30ECDM 1986 Johnson Evinrude 30HP. Which I had for a little under a year..

 

[mables]

Re: dropped from 30 to 5 mph 30hp johnson

By chankcase oil do you mean your lower unit? And were your revs still high when it dropped down?

 

[Will Bark]

Re: dropped from 30 to 5 mph 30hp johnson

If your revs were still high but you weren't moving; sounds like you could have spun the hub on your prop.

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

i WOULD SAY IT WAS GOING JUST AS SLOW IN REV....

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

i'LL BE BACK...
THANKS FOR A QUICK RESPONSE.

i NEED TO STEP OUT

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

y\ YOU SAY MY LOWER UNIT IS POSSIBLE.........WOULD THERE BE A WAY TO DETECT THIS PROBLEM

 

[mables]

Re: dropped from 30 to 5 mph 30hp johnson

I think you would be best served with a factory service manual you can purchase them on iboats get the factory service, not owners, manual and not a clymer or seloc the fsm will have troubleshooting steps you can take and detailed instructions for your motor.

 

[Will Bark]

Re: dropped from 30 to 5 mph 30hp johnson

Was your engine running hard but you not moving but 5 MPH ? This is in forward gear.

 

[boobie]

Re: dropped from 30 to 5 mph 30hp johnson

How many rpm's would you guess the mtr is turning? Is it screaming or just loping along?

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

It was running high rpm at 5mph....in forward and rev,,

 

[wilde1j]

Re: dropped from 30 to 5 mph 30hp johnson

Prop slipping:
1. Mark inner and outer hubs with indelible marker
2. Run boat to planning speed
3. Compare marks ? if they?ve moved relative to each other, hub is slipping
4. Remove prop
5. Take it to a propeller shop and have it rehubbed

 

[54fleetwin]

Re: dropped from 30 to 5 mph 30hp johnson

spun prop

 

[boobie]

Re: dropped from 30 to 5 mph 30hp johnson

Bad prop hub or splines someplace that haven't quite given up yet.

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

I have tooken the prop to A SHOP AND IN 6 MINUTES HAD THE HUB REPLACE. IT WAS BAD . I;LL SEE IF THAT WOULD DO THE TRICK THIS WEEKEND.

THANKS FOR ALL YOUR REPLIES

 

[opag07]

Re: dropped from 30 to 5 mph 30hp johnson

yep
It was a spun hub alright.............and it's at least in the ups and running.

Thanks again