is this normal? attn old merc owners

[johnny howe]

the water sprays outward from my motor. is this normal? it is flooding the back of my boat.

 

[Faztbullet]

Re: is this normal? attn old merc owners

Looks like the engine is to low and cavation plate is catching water.

 

[johnny howe]

Re: is this normal? attn old merc owners

HOW THE HECK do you fix that?
tilt the motor out or in?

 

[Mi duckdown]

Re: is this normal? attn old merc owners

Do you have a 20 inch motor on 15 inch transom??

 

[johnny howe]

Re: is this normal? attn old merc owners

i was told it was the original 66 950ss on a 66 larson..im new to boats. what is a 20 inch motor?

 

[ajgraz]

Re: is this normal? attn old merc owners

Do you trailer the boat? Post a pic of a side view of the transom, showing the relative height of the prop/cavitation plate on the lower unit to the bottom of the hull.

 

[johnny howe]

Re: is this normal? attn old merc owners

i will take a picture tuesday morning and post on here...thanks to all!

 

[merc850]

Re: is this normal? attn old merc owners

It looks like you should raise the motor ,maybe an inch; while you are running look over the transom at the lower unit and note how far in the water it is. You can put a piece of wood under the clamp bracket to hold it up. Make sure that you have at least two bolts in the clamp bracket and the thumbscrews are tight.
Looks like you could also trim it out a notch.

 

[johnny howe]

Re: is this normal? attn old merc owners

thanks! by trim it out a notch...that means moving the pin behind the motor towards the boat or away from the boat right? now the pin is kinda in the middle ( of all the holes that it can be in.)

 

[merc850]

Re: is this normal? attn old merc owners

If you move the pin away from the transom the boat will ride bow higher and go faster, if you move it towards the transom it will ride bow down with a loss of speed and performance. It's really a trial and error procedure but don't put it out too far or the motor may over-rev and lose cooling water intake.

 

[johnny howe]

Re: is this normal? attn old merc owners

i will play with it this weekend. i think i need to move it out. the motor is a 95 hp and the boat will do only 25 mph. i thought it would do better, maybe this is why. thanks again.

 

[merc850]

Re: is this normal? attn old merc owners

Do you have a tach? Sounds like a prop problem as well.

 

[johnny howe]

Re: is this normal? attn old merc owners

i do not, i replaced the starter and "magic" switch box, regapped the points and i somehow lost the tach. all the wires are hooked up correctly, i think. are you saying a prop problem because of speed? or the sound of the motor. i dont think i am at wot even though the forward lever is all the way forward with no more travel. it sounds like it should rev a little bit more, i might be wrong though,( im just watching other tower of power engines on youtube and they sound like they rev a little higher. im sure it needs a new prop.

 

[bullbat]

Re: is this normal? attn old merc owners

if you look at the cavitation plate on your foot for peak performance it should be about level with the bottom of the boat and yes it sounds a little low rpm max rpm should b e around 5400 or 5500 at wot