volvo penta aq170 har start when worm

[horch-d2]

i have fjord 21 dc with aq170A, carbs are new, sparks, head gasket and head jobs are done, when i drive it is has no problem, when i turn it off and try to start it again iit starts perfect but ih i live it for about 10minutes or more and try to start it it needs a lot of time to start .. can anyone know why? thanks and sorry about my english i am from croatia

engine photo

 

[diesel1960]

Re: volvo penta aq170 har start when worm

Just joined the forum,I have AQ170 in my Wellcraft,same problem but found solution,when engine worm just operate throttle two times which injects extra fuel into the intake manifold for easier start.