Mercruser 7,3 diesel

[Wellcraft]

Hello again.. Still not worked out my smoke problem and hard starting..

I have alot of smoke when i start the engine grey , white , and black at once .

On idle its grey almost white.. No coolant is disappearing.
Running fine at idle.. Will not get warm... under 40 centigrade..Why??

Today i tryed to decrease the fuel setting with 2 flats on the pump.. No difference there.. But it got litle more difficult starting..
This shall be the same from a boat engine to an car engin or what??
Engine is 270 hp and 742 Nm of Torque.

Anyone with a good idea..??

[RawPower]

I dont normally here the Nm used for torque measurements...just Ft Lbs. would the nm be nanometers?

[Wellcraft]

No.. Newton Metres.. we use that in Norway


742 Nm is 547 ib-ft i think..

[bilder12]

Has the injection pump ever been worked on ? The way you are talking, there is a problem with the timing. The hard start could be the glow plug system (if equipped). Get someone with a timing system to look at your injection timing. I dont know where the timing should be for marine application but the land engines are about 5 degrees advanced. Also, I didnt know the engine in the boat had a cooling system, I thought it would get cooled by drawing water from the lake and cycle it thru the system.

[Wellcraft]

it is closed fresh water colled.. With heat EXCHANGER..

[Spectramac]

Is it possible someone's got the pump gear out of time? Does it eat fuel like it's going out of style?

[Birken Vogt]

Sounds to me like a clear cut temperature regulation problem...ie thermostat...if it won't get over 40c it is way too cold. It should run more like 80c. Before you can deal with a smoke and low power problem you have to get the water to the proper temperature.

Birken