My 99 Larson has a 4.3GL Volvo Penta engine. I ordered a distributor
cap and rotor from the dealer based on the engine serial number but
the parts are all wrong. My engine seems to have a Prestolite
distributor on it so Volvo can't help.

It is hard to read the model no. on the dist. but it is something
like: 1DU Z602. The cap looks like 1BM 1009 but there is no part
number on the rotor.

Can anyone guess at the correct part no. for this distributor so that
I can get the right rotor and cap?

None of the dealers have these in stock so bringing in the parts won't
help, they just order off computer screens.

Thanks!