i have a 1gm10 yanmar engine
(one cilynder) on my 29 feet sailboat.
yesterday night we had some rough weather
while sailing. i hed to do a small engine
manuver to solv a problam with the rig. the starter didnt work so i had to use the manual starting. it is usually a phisical effort but im used to it now. but this time it took me 3 tryels and it was especially hard. finally it started with a very strange rithem of work. after 5 seconds it made a big boom! ternd off and exheld a lot of smoke from the air inlet. i didnt try to start it agein after that untill we arrived in the marina today.
today i started it agein menually (took a few tryls) and it made the strange rithem agein so i ternd it off fast after 3 seconds. i made some priming to the fule sistem and tryd agein to start it and it workd fine.
i checkd the air filter becouse of the smoke that came out of the air inlet and found a lot of soot with an oily texture when you toch the filter. i checkd the engine oil
level and its full. what is the meaning of the smoke exiting the air inlet? or the big boom that coused the smoke? im worride aboute some dammage to the cilynder. or maybe something else? anybody know the meaning of this?
i should say that my engine is an old one with up to 28 years behinde him. i made 350 hours on it in the last year myself but i have been making all the oil
and filter maintenence on time. i even made valve clearence 250 hours ago (3 mounth ago).
thanks a lot