[christian.hess]

well first see if its not seized...does your engine have decomp levers? make sure it turns freely

then start dealing with the other things

I would suggest at the minimum, oil change and all fuel and oil filters, check fuel pump and diaphragms and use new fresh fuel with maybe an additive to "clean" injectors if you dont want to take them off initially

use a spearate tank for that while you clean your main take and lines...

if it wont start you have to start taking things apart and diagnosing but Ive seen some diesels look like crap start right up after being left to rot for decades...

of course before that a new air filter, make sure no mice or animals are inside the intake, exhaust isnt plugged, flange and elbow are clear

I would check the impeller(s)

all the usual suspects...

good luck

an important issue is was the boat dry docked or in the water...?

 

[christian.hess]

did you at least close the intake and protect it from the air or was it left "exposed" and again was it in dry storage or oin the water

if in the water its very probable you have rusty cylinders...however diesels are so damn robust a quick spray of oil or wd 40 and a few turns over is enough...

just make sure you are not seized.

 

[christian.hess]

just spray the intake lightly....thats good you always turned it over

you know its free
diesels are robust...

do whats been said above by us and youll be back in business

 

[christian.hess]

you havent bled ths system properly

25 secs crank is a lot, waterlock or not thats hard on the starting system

 

[christian.hess]

dfinitely fuel...make sure its getting to the injectors like previously mentioned

 

[christian.hess]

no matter what they say you need to reprime especially after sitting that long...

I had a 2gm same deal anytime ANYTHING got touched on the fuel system you had to prime...(bleed)

while the electric pump helps its by no means a self bleeding system...that is darn near impossible

 

[christian.hess]

HELL YEAH MAN! congrats

sounds good too