Sd 22 diesel in boat won't increase rpm in gear

SD diesels were widely available in the US in the 1981-86 Datsun/Nissan 720 pickups, and in Canada through '87 in the D21 pickup.

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Ldog
Posts: 7
Joined: 1 year ago

Sd 22 diesel in boat won't increase rpm in gear

#1

Post by Ldog » 1 year ago

Well, now I am really stumped. When out of gear, engine revs perfectly. When put in forward, the revs will not increase. In reverse, just stalls. Help please!!

Ldog
Posts: 7
Joined: 1 year ago

Re: Sd 22 diesel in boat won't increase rpm in gear

#2

Post by Ldog » 1 year ago

I checked fuel pickup, changed all filters, prop shaft free, no air in system, linkage ok, ideas?

waynosworld
Posts: 517
Joined: 7 years ago
Location: Vancouver Washington USA

Re: Sd 22 diesel in boat won't increase rpm in gear

#3

Post by waynosworld » 1 year ago

I don't really know a lot about the boat engines and what they all have, is there a lift pump with a primer on the side of the injection pump?
If there is, does it have a screen in the bottom banjo fitting where the fuel enters the lift pump, that one may need to be cleaned.
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Otherwise have you had the injection pump off or have you adjusted it for any reason?
I know the voices are not real,
but they have some really good ideas.

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