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  1. I

    Cant get WOT above 3400

    Looking for ideas here. 1986 Sun Runner 31ft cruiser. Weighing approx. 10,000lbs. Two new chevy 350 small blocks from Advanced Marine engine. Two rebuilt AQ290a SP drives in 2015. Props are 15.5 x 17p counter-rotating. Added HEI 65,000 volt Marine distributors, timed at 8 deg BTDC @800rpm., and...
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    Aquamatic propeller Question

    I have a 1986 Sun Runner 310SB cruiser which weighs in at 9,960lbs. It has a waterline length of approximately 28ft and a beam of 11ft 6in. Original power units(2) are Volvo Penta AQ260/290A I have rebuilt as new original AQ290A outdrives on the boat This boat will be completely re-powered this...
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    Building a new 350 SBC for my boat

    So, here is the deal. 1985 Sun Runner 310 with twin VP AQ260/290As. Starboard motor is an 85 block # 14010207, probably original. Port engine is an 87 block, #10066036 (Hencho de Mexico). Replaced at some point. Looks like I will be building an engine to replace the tired low...
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    Tired AQ260s Running out of hope

    I was writing last summer on the rebuild of our 86 Sun Runner 310SB, which, BTW, is really an 85. We did get her in the water on the Ohio River and sailed 70 miles down river from East Cincinnati to Warsaw, Ky. We could not get her up on a plane as the RPMS would not come up over 3000. However...
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    Twin AQ260/AQ290A wont go over 3000 rpm

    1986 31ft Sun runner with twin 350 chevy small blocks. new out drives. The boat sat for a long time with gas in the tank. put in 50 gallons of fresh gas. We ran it down river 70 miles down the Ohio to its new marina. both engines exhibit the same problem. Cannot get the rpms to go over 3000...
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    1986 Aq260/Aq290A starter, which one?

    Folks, I am in a quandary here. Just got my rebuilt outdrives on and all ready to go when my Starboard engine wont start. Bad Starter. Smoked the battery wire. So, I have found about 9 different part numbers for a starter. This should be a standard chevy 350 small block no? This is a 1986 Sun...
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    AQ290 SP to DP

    Can I swap my lower unit from a single prop to a Duo Prop? I have twin AQ290a units powered by two 350 chevy engines. What do I need to swap out to make this happen? Is there a case part number to look for? Thanks, Kevin
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    Grease recommendations

    Ricardo, Since you have much experience with the AQ290 drives, what are your grease recommendations for the PDS bearings in the FLywheel cover and for the grease in the steering forks bushing area. I have the green marine grease, but it appears the grease in the PDS area is black in color...
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    AQ290 Transmission question

    Hi Folks, I have twin 1985 AQ290 outdrives. I am rebuilding them as far as new seals, gaskets, paint, etc. Both transmissions are removed for cleanup, gaskets, seals, U-joints, Etc. On the Starboard drive transmission, when I put it into forward or reverse, you can turn the u-joint and the...
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    AQ290 Prop Shaft removal Tool

    Hey Ricardo, Do you have any full size pictures of your homebuilt 290 Prop shaft removal tool? I cant seem to blow up the thumbnails big enough to read them for materials and assembly. Thank you very much for all your help. Indy1K Kevin Croak 1985 SunRunner 310 Sunbridge twin AQ260/290A units
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    AQ290 Decals

    As I am rebuilding my two 1986 AQ290 outdrives, I am wanting to replace the original sliver decals on the sides of the transmission and on the front Shift Protector cover. First, does anyone know where to get them? Second, I have a friend that can reproduce the original vinyl decals same as...
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    AQ290 Separating the lower unit from the Intermediate unit - HELP

    Hey Folks, Need some help here. I am rebuilding my two outdrives and need to remove the lower unit from the intermediate housing. I have removed all the bolts but I still cannot get them to split. I have rubber mallet-ed the heck out of them. Then tried a cold chisel at the seam but I am only...
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    AQ290 Seals face each other, Huh?

    I am reassembling the pivot assembly for the water tube, Intermediate Housing to H bracket. In the service manual it says to put the needle bearing seals in facing each other so as to seal out water and keep the grease inside. My interpretation of that is that the rubber seal faces outward from...
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    1986 AQ290 Steering spindle bearing question

    Hey folks, Finally bought the special tools and a 12 ton press to properly remove the Steering Spindles from the Yokes so I can replace the seals and washers. On inspection, the needle bearings are well greased and the yokes moved freely, but since I have the drives down this far and only want...
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    WhatBellhousing is correct for AQ260A/290

    Hi folks, In the spring, I will be looking at pulling my twin 350 SBCs to replace the PDS bearings. This is on a 1985 Sun Runner 310. I figure since the outdrives are off and I am rebuilding them and replacing the U-joints and have no evidence that these bearings were ever replaced, I should...
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    Output shaft Bearing on AQ260/290, Replace it?

    Hi Folks, we have a 1985 Sun Runner 310. I have pulled to outdrives off to replace them with 2 much better freshwater drives. I was reading an older post and it was mentioned by Ricardo to replace the PDS Bearing which is the engine output shaft bearing in the transom plate/Bellhousing where...
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    Which prop to use on my AG290's

    Hi Folks, I have a question about Prop Pitch. We just bought a 1985 SunRunner 310SB. The boat weighs in at 9300lbs dry. can carry 150 gallons of fuel. It is a Deep Vee hull with flat stabilizing chines. It is powered by 2 AQ260/AQ290 units. I believe they are 305 chevy small blocks. The...
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    Cockpit couch for 85 SunRunner 310SB

    We are looking for an original "L" shaped couch that goes in the cockpit of our 1985 SunRunner 310Sunbridge. Any condition ok. It would look like this Thanks, Kevin
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    AQ260/290 Shimming lower unit to intermediate Units

    Hello Ricardo, I was told you are the expert on these older Aquamatic drives. I recently bought a 1986 SunRunner with twin AQ260/290 units in it. The engines were rebuilt last year and run fine. The is only 210 hours on the meters. I am replacing the intermediate and lower units with two good...
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