69 Caravelle Mercruiser 120 I/O

[jwh]

Hi!
Never having owned a I/O boat before I have what is probably a really stupid question to some of you. Checking switches and pull switches on my boat(all work thank goodness. One of them starts what sounds like a blower in the engine compartment. Is this for blowing out gas fumes while running? If so does it need to run constantly whille the motor is running? Thanks John

 

[81 Checkmate]

Re: 69 Caravelle Mercruiser 120 I/O

Yes on the blower in my book! It is to suck out dangerous fumes in bilge area.

I leave mine on at all times... let run a few min before starting and at low speeds and after refueling before starting..... Some say you can turn it off when crusing at higher speeds...which is correct...but just have to remember to turn it back on.

Im am sure others will chime in on this. Such a great debate

Good luck with your new boat!

 

[Fishermark]

Re: 69 Caravelle Mercruiser 120 I/O

I'll take the other side of the coin and say no. Yes, you do need to run it for a few minutes before starting the engine, but once underway it is not necessary.

Being that your boat is a 1969, how's the access to the engine? Seems like most of the older boats are not as confined as the newer boats.

 

[jwh]

Re: 69 Caravelle Mercruiser 120 I/O

Thanks guys for the info. Yes it is easy to get to the motor and there is actually quite a bit of room. Is there a special way to change the oil in the motor? It doesn't have a lot of clearance under it for some kind of drain pan and I am not sure there is a drain plug. But I do need to change the oil and filter. Whoever had it before me did not keep the oil changed it is pretty dirty. The oil in the outdrive was even low and dirty so I changed that. Hard to believe people take care of stuff like this. I am just tickled to have it so it will get the care it deserves. John

 

[Bondo]

Re: 69 Caravelle Mercruiser 120 I/O

Thanks guys for the info. Yes it is easy to get to the motor and there is actually quite a bit of room. Is there a special way to change the oil in the motor? It doesn't have a lot of clearance under it for some kind of drain pan and I am not sure there is a drain plug. But I do need to change the oil and filter. Whoever had it before me did not keep the oil changed it is pretty dirty. The oil in the outdrive was even low and dirty so I changed that. Hard to believe people take care of stuff like this. I am just tickled to have it so it will get the care it deserves. John

Ayuh,... Ya pump the oil out through the dipstick on a boat motor,...

There's alota different systems,....
I recently bought the Mouller pump it, 'n walk away vacuum canister style...
Donno how I ever got by without it....

For the Filter,...
Crack it loose with yer strap-wrench, 'n slip a big baggie 'round it, 'n spin it off, into the baggie..
seal it up, 'n toss it...

 

[jaymo1994]

Re: 69 Caravelle Mercruiser 120 I/O

Hi!
Never having owned a I/O boat before I have what is probably a really stupid question to some of you. Checking switches and pull switches on my boat(all work thank goodness. One of them starts what sounds like a blower in the engine compartment. Is this for blowing out gas fumes while running? If so does it need to run constantly whille the motor is running? Thanks John

Im glad i looked at this section because i was fixing to ask the same thing ,just purchased a 1978 Carrevelle with a 470.

 

[Part-time]

Re: 69 Caravelle Mercruiser 120 I/O

This is the style of pump I use at work... works really great and I can even do oil changes without pulling the boats out of the water, even the 4 stroke outboards.

"Quick clean and easy. The pump extracts oil through the engine dipstick hole. Simply pump to create a vacuum; the oil is sucked into the holding chamber, which can then be easily emptied. The cylindrical versions have a heavy duty pump unit. Requires just 4 to 15 strokes in a row to create a powerful vacuum. The integrated container (6.5 litres) then neatly captures the oil preventing messy spills. The see-through, calibrated container lets the user know how much oil has been extracted. A built-in float switch automatically stops extraction as soon as capacity is reached. A pour spout facilitates emptying. With the pump housed inside the container. "

 

[jwh]

Re: 69 Caravelle Mercruiser 120 I/O

you guys are great, lots of good info. Thanks much John